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 196 \r
 197 <h1>ImageMagick Convert Command-line Tool</h1>
 198 <p class="navigation-index">[<a href="#usage">Example Usage</a> &bull; <a href="#options">Option Summary</a>]</p>
 199
 200 <div class="doc-section">
 201 <p>Use the <kbd>convert</kbd> program to convert between image formats as well as resize an image, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more.   See <a href="../www/command-line-processing.html">Command Line Processing</a> for advice on how to structure your <kbd>convert</kbd> command or see below for example usages of the command.</p>
 202 </div>
 203
 204 <h2><a id="usage"></a>Example Usage</h2>
 205 <div class="doc-section">
 206
 207 <p>We list a few examples of the <kbd>convert</kbd> command here to illustrate its usefulness and ease of use.  To get started, lets convert an image in the JPEG format to PNG:</p>
 208
 209 <p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>convert rose.jpg rose.png</span></p>
 210 <p>Next, we reduce the image size before it is written to the PNG format:</p>
 211
 212 <p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>convert rose.jpg -resize 50% rose.png</span></p>
 213 <p class="image">
 214   <a href="../images/rose.jpg">
 215   <img src="../images/rose.jpg" width="70" height="46" alt="rose" />
 216   </a>
 217   <img style="margin-top:13px; margin-bottom:13px;" src="../images/right.gif" width="20" height="20" alt="==>" />
 218   <a href="../images/rose.png">
 219   <img style="margin-top:11px; margin-bottom:12px;" src="../images/rose.png" width="35" height="23" alt="rose" />
 220   </a>
 221 </p>
 222
 223 <p>You can combine multiple image-processing operations to produce complex results:</p>
 224
 225 <p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>convert -size 320x85 xc:transparent -font Bookman-DemiItalic -pointsize 72 \ <br/>
 226 -draw "text 25,60 'Magick'" -channel RGBA -blur 0x6 -fill darkred -stroke magenta \ <br/>
 227 -draw "text 20,55 'Magick'" fuzzy-magick.png</span></p>
 228 <p class="image">
 229   <a href="../images/fuzzy-magick.png"><img src="../images/fuzzy-magick.png" width="320" height="85" alt="fuzzy-magick" /></a>
 230 </p>
 231
 232 <p>You can find additional examples of using <kbd>convert</kbd> in <a href="http://www.imagemagick.org/Usage/">Examples of ImageMagick Usage</a>.</p>
 233
 234 </div>
 235
 236 <h2><a id="options"></a>Option Summary</h2>
 237 <div class="doc-section">
 238
 239 <p>The <kbd>convert</kbd> command recognizes these options.  Click on an option to get more details about how that option works.</p>
 240
 241 <table class="doc">
 242   <tbody>
 243   <tr>
 244     <th align="left">Option</th>
 245     <th align="left">Description</th>
 246   </tr>
 247
 248   <tr>
 249     <td valign="top"><a href="../www/command-line-options.html#adaptive-blur">-adaptive-blur <em class="option">geometry</em></a></td>
 250     <td valign="top">adaptively blur pixels; decrease effect near edges</td>
 251   </tr>
 252
 253   <tr>
 254     <td valign="top"><a href="../www/command-line-options.html#adaptive-resize">-adaptive-resize <em class="option">geometry</em></a></td>
 255     <td valign="top">adaptively resize image with data dependent triangulation.</td>
 256   </tr>
 257
 258   <tr>
 259     <td valign="top"><a href="../www/command-line-options.html#adaptive-sharpen">-adaptive-sharpen <em class="option">geometry</em></a></td>
 260     <td valign="top">adaptively sharpen pixels; increase effect near edges</td>
 261   </tr>
 262
 263   <tr>
 264     <td valign="top"><a href="../www/command-line-options.html#adjoin">-adjoin</a></td>
 265     <td valign="top">join images into a single multi-image file</td>
 266   </tr>
 267
 268   <tr>
 269     <td valign="top"><a href="../www/command-line-options.html#affine">-affine <em class="option">matrix</em></a></td>
 270     <td valign="top">affine transform matrix</td>
 271   </tr>
 272
 273   <tr>
 274     <td valign="top"><a href="../www/command-line-options.html#alpha">-alpha</a></td>
 275     <td valign="top">on, activate, off, deactivate, set, opaque, copy",
 276 transparent, extract, background, or shape the alpha channel</td>
 277   </tr>
 278
 279   <tr>
 280     <td valign="top"><a href="../www/command-line-options.html#annotate">-annotate <em class="option">geometry text</em></a></td>
 281     <td valign="top">annotate the image with text</td>
 282   </tr>
 283
 284   <tr>
 285     <td valign="top"><a href="../www/command-line-options.html#antialias">-antialias</a></td>
 286     <td valign="top">remove pixel-aliasing</td>
 287   </tr>
 288
 289   <tr>
 290     <td valign="top"><a href="../www/command-line-options.html#append">-append</a></td>
 291     <td valign="top">append an image sequence</td>
 292   </tr>
 293
 294   <tr>
 295     <td valign="top"><a href="../www/command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
 296     <td valign="top">decipher image with this password</td>
 297   </tr>
 298
 299   <tr>
 300     <td valign="top"><a href="../www/command-line-options.html#auto-gamma">-auto-gamma</a></td>
 301     <td valign="top">automagically adjust gamma level of image</td>
 302   </tr>
 303
 304   <tr>
 305     <td valign="top"><a href="../www/command-line-options.html#auto-level">-auto-level</a></td>
 306     <td valign="top">automagically adjust color levels of image</td>
 307   </tr>
 308
 309   <tr>
 310     <td valign="top"><a href="../www/command-line-options.html#auto-orient">-auto-orient</a></td>
 311     <td valign="top">automagically orient image</td>
 312   </tr>
 313
 314   <tr>
 315     <td valign="top"><a href="../www/command-line-options.html#background">-background <em class="option">color</em></a></td>
 316     <td valign="top">background color</td>
 317   </tr>
 318
 319   <tr>
 320     <td valign="top"><a href="../www/command-line-options.html#bench">-bench <em class="option">iterations</em></a></td>
 321     <td valign="top">measure performance</td>
 322   </tr>
 323
 324   <tr>
 325     <td valign="top"><a href="../www/command-line-options.html#bias">-bias <em class="option">value</em></a></td>
 326     <td valign="top">add bias when convolving an image</td>
 327   </tr>
 328
 329   <tr>
 330     <td valign="top"><a href="../www/command-line-options.html#black-threshold">-black-threshold <em class="option">value</em></a></td>
 331     <td valign="top">force all pixels below the threshold into black</td>
 332   </tr>
 333
 334   <tr>
 335     <td valign="top"><a href="../www/command-line-options.html#blue-primary">-blue-primary <em class="option">point</em></a></td>
 336     <td valign="top">chromaticity blue primary point</td>
 337   </tr>
 338
 339   <tr>
 340     <td valign="top"><a href="../www/command-line-options.html#blue-shift">-blue-shift <em class="option">factor</em></a></td>
 341     <td valign="top">simulate a scene at nighttime in the moonlight</td>
 342   </tr>
 343
 344   <tr>
 345     <td valign="top"><a href="../www/command-line-options.html#blur">-blur <em class="option">geometry</em></a></td>
 346     <td valign="top">reduce image noise and reduce detail levels</td>
 347   </tr>
 348
 349   <tr>
 350     <td valign="top"><a href="../www/command-line-options.html#border">-border <em class="option">geometry</em></a></td>
 351     <td valign="top">surround image with a border of color</td>
 352   </tr>
 353
 354   <tr>
 355     <td valign="top"><a href="../www/command-line-options.html#bordercolor">-bordercolor <em class="option">color</em></a></td>
 356     <td valign="top">border color</td>
 357   </tr>
 358
 359   <tr>
 360     <td valign="top"><a href="../www/command-line-options.html#brightness-contrast">-brightness-contrast <em class="option">geometry</em></a></td>
 361     <td valign="top">improve brightness / contrast of the image</td>
 362   </tr>
 363
 364   <tr>
 365     <td valign="top"><a href="../www/command-line-options.html#caption">-caption <em class="option">string</em></a></td>
 366     <td valign="top">assign a caption to an image</td>
 367   </tr>
 368
 369   <tr>
 370     <td valign="top"><a href="../www/command-line-options.html#cdl">-cdl <em class="option">filename</em></a></td>
 371     <td valign="top">color correct with a color decision list</td>
 372   </tr>
 373
 374   <tr>
 375     <td valign="top"><a href="../www/command-line-options.html#channel">-channel <em class="option">type</em></a></td>
 376     <td valign="top">apply option to select image channels</td>
 377   </tr>
 378
 379   <tr>
 380     <td valign="top"><a href="../www/command-line-options.html#charcoal">-charcoal <em class="option">radius</em></a></td>
 381     <td valign="top">simulate a charcoal drawing</td>
 382   </tr>
 383
 384   <tr>
 385     <td valign="top"><a href="../www/command-line-options.html#chop">-chop <em class="option">geometry</em></a></td>
 386     <td valign="top">remove pixels from the image interior</td>
 387   </tr>
 388
 389   <tr>
 390     <td valign="top"><a href="../www/command-line-options.html#clamp">-clamp</a></td>
 391     <td valign="top">restrict colors from 0 to the quantum depth</td>
 392   </tr>
 393
 394   <tr>
 395     <td valign="top"><a href="../www/command-line-options.html#clip">-clip</a></td>
 396     <td valign="top">clip along the first path from the 8BIM profile</td>
 397   </tr>
 398
 399   <tr>
 400     <td valign="top"><a href="../www/command-line-options.html#clip-mask">-clip-mask</a> <em class="option">filename</em></td>
 401     <td valign="top">associate clip mask with the image</td>
 402   </tr>
 403
 404   <tr>
 405     <td valign="top"><a href="../www/command-line-options.html#clip-path">-clip-path <em class="option">id</em></a></td>
 406     <td valign="top">clip along a named path from the 8BIM profile</td>
 407   </tr>
 408
 409   <tr>
 410     <td valign="top"><a href="../www/command-line-options.html#clone">-clone <em class="option">index</em></a></td>
 411     <td valign="top">clone an image</td>
 412   </tr>
 413
 414   <tr>
 415     <td valign="top"><a href="../www/command-line-options.html#clut">-clut</a></td>
 416     <td valign="top">apply a color lookup table to the image</td>
 417   </tr>
 418
 419   <tr>
 420     <td valign="top"><a href="../www/command-line-options.html#contrast-stretch">-contrast-stretch <em class="option">geometry</em></a></td>
 421     <td valign="top">improve the contrast in an image by `stretching' the range of intensity value</td>
 422   </tr>
 423
 424   <tr>
 425     <td valign="top"><a href="../www/command-line-options.html#coalesce">-coalesce</a></td>
 426     <td valign="top">merge a sequence of images</td>
 427   </tr>
 428
 429   <tr>
 430     <td valign="top"><a href="../www/command-line-options.html#colorize">-colorize <em class="option">value</em></a></td>
 431     <td valign="top">colorize the image with the fill color</td>
 432   </tr>
 433
 434   <tr>
 435     <td valign="top"><a href="../www/command-line-options.html#color-matrix">-color-matrix <em class="option">matrix</em></a></td>
 436     <td valign="top">apply color correction to the image.</td>
 437   </tr>
 438
 439   <tr>
 440     <td valign="top"><a href="../www/command-line-options.html#colors">-colors <em class="option">value</em></a></td>
 441     <td valign="top">preferred number of colors in the image</td>
 442   </tr>
 443
 444   <tr>
 445     <td valign="top"><a href="../www/command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
 446     <td valign="top">set image colorspace</td>
 447   </tr>
 448
 449   <tr>
 450     <td valign="top"><a href="../www/command-line-options.html#combine">-combine</a></td>
 451     <td valign="top">combine a sequence of images</td>
 452   </tr>
 453
 454   <tr>
 455     <td valign="top"><a href="../www/command-line-options.html#comment">-comment <em class="option">string</em></a></td>
 456     <td valign="top">annotate image with comment</td>
 457   </tr>
 458
 459   <tr>
 460     <td valign="top"><a href="../www/command-line-options.html#compose">-compose <em class="option">operator</em></a></td>
 461     <td valign="top">set image composite operator</td>
 462   </tr>
 463
 464   <tr>
 465     <td valign="top"><a href="../www/command-line-options.html#composite">-composite</a></td>
 466     <td valign="top">composite image</td>
 467   </tr>
 468
 469   <tr>
 470     <td valign="top"><a href="../www/command-line-options.html#compress">-compress <em class="option">type</em></a></td>
 471     <td valign="top">image compression type</td>
 472   </tr>
 473
 474   <tr>
 475     <td valign="top"><a href="../www/command-line-options.html#contrast">-contrast</a></td>
 476     <td valign="top">enhance or reduce the image contrast</td>
 477   </tr>
 478
 479   <tr>
 480     <td valign="top"><a href="../www/command-line-options.html#convolve">-convolve <em class="option">coefficients</em></a></td>
 481     <td valign="top">apply a convolution kernel to the image</td>
 482   </tr>
 483
 484   <tr>
 485     <td valign="top"><a href="../www/command-line-options.html#crop">-crop <em class="option">geometry</em></a></td>
 486     <td valign="top">crop the image</td>
 487   </tr>
 488
 489   <tr>
 490     <td valign="top"><a href="../www/command-line-options.html#cycle">-cycle <em class="option">amount</em></a></td>
 491     <td valign="top">cycle the image colormap</td>
 492   </tr>
 493
 494   <tr>
 495     <td valign="top"><a href="../www/command-line-options.html#decipher">-decipher <em class="option">filename</em></a></td>
 496     <td valign="top">convert cipher pixels to plain</td>
 497   </tr>
 498
 499   <tr>
 500     <td valign="top"><a href="../www/command-line-options.html#debug">-debug <em class="option">events</em></a></td>
 501     <td valign="top">display copious debugging information</td>
 502   </tr>
 503
 504   <tr>
 505     <td valign="top"><a href="../www/command-line-options.html#define">-define <em class="option">format:option</em></a></td>
 506     <td valign="top">define one or more image format options</td>
 507   </tr>
 508
 509   <tr>
 510     <td valign="top"><a href="../www/command-line-options.html#deconstruct">-deconstruct</a></td>
 511     <td valign="top">break down an image sequence into constituent parts</td>
 512   </tr>
 513
 514   <tr>
 515     <td valign="top"><a href="../www/command-line-options.html#delay">-delay <em class="option">value</em></a></td>
 516     <td valign="top">display the next image after pausing</td>
 517   </tr>
 518
 519   <tr>
 520     <td valign="top"><a href="../www/command-line-options.html#delete">-delete <em class="option">index</em></a></td>
 521     <td valign="top">delete the image from the image sequence</td>
 522   </tr>
 523
 524   <tr>
 525     <td valign="top"><a href="../www/command-line-options.html#density">-density <em class="option">geometry</em></a></td>
 526     <td valign="top">horizontal and vertical density of the image</td>
 527   </tr>
 528
 529   <tr>
 530     <td valign="top"><a href="../www/command-line-options.html#depth">-depth <em class="option">value</em></a></td>
 531     <td valign="top">image depth</td>
 532   </tr>
 533
 534   <tr>
 535     <td valign="top"><a href="../www/command-line-options.html#despeckle">-despeckle</a></td>
 536     <td valign="top">reduce the speckles within an image</td>
 537   </tr>
 538
 539   <tr>
 540     <td valign="top"><a href="../www/command-line-options.html#direction">-direction <em class="option">type</em></a></td>
 541     <td valign="top">render text right-to-left or left-to-right</td>
 542   </tr>
 543
 544   <tr>
 545     <td valign="top"><a href="../www/command-line-options.html#display">-display <em class="option">server</em></a></td>
 546     <td valign="top">get image or font from this X server</td>
 547   </tr>
 548
 549   <tr>
 550     <td valign="top"><a href="../www/command-line-options.html#dispose">-dispose <em class="option">method</em></a></td>
 551     <td valign="top">layer disposal method</td>
 552   </tr>
 553
 554   <tr>
 555     <td valign="top"><a href="../www/command-line-options.html#distort">-distort <em class="option">type coefficients</em></a></td>
 556     <td valign="top">distort image</td>
 557   </tr>
 558
 559   <tr>
 560     <td valign="top"><a href="../www/command-line-options.html#dither">-dither  <em class="option">method</em></a></td>
 561     <td valign="top">apply error diffusion to image</td>
 562   </tr>
 563
 564   <tr>
 565     <td valign="top"><a href="../www/command-line-options.html#draw">-draw <em class="option">string</em></a></td>
 566     <td valign="top">annotate the image with a graphic primitive</td>
 567   </tr>
 568
 569   <tr>
 570     <td valign="top"><a href="../www/command-line-options.html#edge">-edge <em class="option">radius</em></a></td>
 571     <td valign="top">apply a filter to detect edges in the image</td>
 572   </tr>
 573
 574   <tr>
 575     <td valign="top"><a href="../www/command-line-options.html#emboss">-emboss <em class="option">radius</em></a></td>
 576     <td valign="top">emboss an image</td>
 577   </tr>
 578
 579   <tr>
 580     <td valign="top"><a href="../www/command-line-options.html#encipher">-encipher <em class="option">filename</em></a></td>
 581     <td valign="top">convert plain pixels to cipher pixels</td>
 582   </tr>
 583
 584   <tr>
 585     <td valign="top"><a href="../www/command-line-options.html#encoding">-encoding <em class="option">type</em></a></td>
 586     <td valign="top">text encoding type</td>
 587   </tr>
 588
 589   <tr>
 590     <td valign="top"><a href="../www/command-line-options.html#endian">-endian <em class="option">type</em></a></td>
 591     <td valign="top">endianness (MSB or LSB) of the image</td>
 592   </tr>
 593
 594   <tr>
 595     <td valign="top"><a href="../www/command-line-options.html#enhance">-enhance</a></td>
 596     <td valign="top">apply a digital filter to enhance a noisy image</td>
 597   </tr>
 598
 599   <tr>
 600     <td valign="top"><a href="../www/command-line-options.html#equalize">-equalize</a></td>
 601     <td valign="top">perform histogram equalization to an image</td>
 602   </tr>
 603
 604   <tr>
 605     <td valign="top"><a href="../www/command-line-options.html#evaluate">-evaluate <em class="option">operator value</em></a></td>
 606     <td valign="top">evaluate an arithmetic, relational, or logical expression</td>
 607   </tr>
 608
 609   <tr>
 610     <td valign="top"><a href="../www/command-line-options.html#evaluate-sequence">-evaluate-sequence <em class="option">operator</em></a></td>
 611     <td valign="top">evaluate an arithmetic, relational, or logical expression for an image sequence</td>
 612   </tr>
 613
 614   <tr>
 615     <td valign="top"><a href="../www/command-line-options.html#extent">-extent <em class="option">geometry</em></a></td>
 616     <td valign="top">set the image size</td>
 617   </tr>
 618
 619   <tr>
 620     <td valign="top"><a href="../www/command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
 621     <td valign="top">extract area from image</td>
 622   </tr>
 623
 624   <tr>
 625     <td valign="top"><a href="../www/command-line-options.html#family">-family <em class="option">name</em></a></td>
 626     <td valign="top">render text with this font family</td>
 627   </tr>
 628
 629   <tr>
 630     <td valign="top"><a href="../www/command-line-options.html#fft">-fft</a></td>
 631     <td valign="top">implments the discrete Fourier transform (DFT)</td>
 632   </tr>
 633
 634   <tr>
 635     <td valign="top"><a href="../www/command-line-options.html#fill">-fill <em class="option">color</em></a></td>
 636     <td valign="top">color to use when filling a graphic primitive</td>
 637   </tr>
 638
 639   <tr>
 640     <td valign="top"><a href="../www/command-line-options.html#filter">-filter <em class="option">type</em></a></td>
 641     <td valign="top">use this filter when resizing an image</td>
 642   </tr>
 643
 644   <tr>
 645     <td valign="top"><a href="../www/command-line-options.html#flatten">-flatten</a></td>
 646     <td valign="top">flatten a sequence of images</td>
 647   </tr>
 648
 649   <tr>
 650     <td valign="top"><a href="../www/command-line-options.html#flip">-flip</a></td>
 651     <td valign="top">flip image in the vertical direction</td>
 652   </tr>
 653
 654   <tr>
 655     <td valign="top"><a href="../www/command-line-options.html#floodfill">-floodfill <em class="option">geometry color</em></a></td>
 656     <td valign="top">floodfill the image with color</td>
 657   </tr>
 658
 659   <tr>
 660     <td valign="top"><a href="../www/command-line-options.html#flop">-flop</a></td>
 661     <td valign="top">flop image in the horizontal direction</td>
 662   </tr>
 663
 664   <tr>
 665     <td valign="top"><a href="../www/command-line-options.html#font">-font <em class="option">name</em></a></td>
 666     <td valign="top">render text with this font</td>
 667   </tr>
 668
 669   <tr>
 670     <td valign="top"><a href="../www/command-line-options.html#format_identify_">-format <em class="option">string</em></a></td>
 671     <td valign="top">output formatted image characteristics</td>
 672   </tr>
 673
 674   <tr>
 675     <td valign="top"><a href="../www/command-line-options.html#frame">-frame <em class="option">geometry</em></a></td>
 676     <td valign="top">surround image with an ornamental border</td>
 677   </tr>
 678
 679   <tr>
 680     <td valign="top"><a href="../www/command-line-options.html#function">-function <em class="option">name</em></a></td>
 681     <td valign="top">apply a function to the image</td>
 682   </tr>
 683
 684   <tr>
 685     <td valign="top"><a href="../www/command-line-options.html#fuzz">-fuzz <em class="option">distance</em></a></td>
 686     <td valign="top">colors within this distance are considered equal</td>
 687   </tr>
 688
 689   <tr>
 690     <td valign="top"><a href="../www/command-line-options.html#fx">-fx <em class="option">expression</em></a></td>
 691     <td valign="top">apply mathematical expression to an image channel(s)</td>
 692   </tr>
 693
 694   <tr>
 695     <td valign="top"><a href="../www/command-line-options.html#gamma">-gamma <em class="option">value</em></a></td>
 696     <td valign="top">level of gamma correction</td>
 697   </tr>
 698
 699   <tr>
 700     <td valign="top"><a href="../www/command-line-options.html#gaussian-blur">-gaussian-blur <em class="option">geometry</em></a></td>
 701     <td valign="top">reduce image noise and reduce detail levels</td>
 702   </tr>
 703
 704   <tr>
 705     <td valign="top"><a href="../www/command-line-options.html#geometry">-geometry <em class="option">geometry</em></a></td>
 706     <td valign="top">preferred size or location of the image</td>
 707   </tr>
 708
 709   <tr>
 710     <td valign="top"><a href="../www/command-line-options.html#gravity">-gravity <em class="option">type</em></a></td>
 711     <td valign="top">horizontal and vertical text placement</td>
 712   </tr>
 713
 714   <tr>
 715     <td valign="top"><a href="../www/command-line-options.html#green-primary">-green-primary <em class="option">point</em></a></td>
 716     <td valign="top">chromaticity green primary point</td>
 717   </tr>
 718
 719   <tr>
 720     <td valign="top"><a href="../www/command-line-options.html#help">-help</a></td>
 721     <td valign="top">print program options</td>
 722   </tr>
 723
 724   <tr>
 725     <td valign="top"><a href="../www/command-line-options.html#identify">-identify</a></td>
 726     <td valign="top">identify the format and characteristics of the image</td>
 727   </tr>
 728
 729   <tr>
 730     <td valign="top"><a href="../www/command-line-options.html#ift">-ift</a></td>
 731     <td valign="top">implements the inverse discrete Fourier transform (DFT)</td>
 732   </tr>
 733
 734   <tr>
 735     <td valign="top"><a href="../www/command-line-options.html#implode">-implode <em class="option">amount</em></a></td>
 736     <td valign="top">implode image pixels about the center</td>
 737   </tr>
 738
 739   <tr>
 740     <td valign="top"><a href="../www/command-line-options.html#insert">-insert <em class="option">index</em></a></td>
 741     <td valign="top">insert last image into the image sequence</td>
 742   </tr>
 743
 744   <tr>
 745     <td valign="top"><a href="../www/command-line-options.html#intent">-intent <em class="option">type</em></a></td>
 746     <td valign="top">type of rendering intent when managing the image color</td>
 747   </tr>
 748
 749   <tr>
 750     <td valign="top"><a href="../www/command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
 751     <td valign="top">type of image interlacing scheme</td>
 752   </tr>
 753
 754   <tr>
 755     <td valign="top"><a href="../www/command-line-options.html#interline-spacing">-interline-spacing <em class="option">value</em></a></td>
 756     <td valign="top">the space between two text lines</td>
 757   </tr>
 758
 759   <tr>
 760     <td valign="top"><a href="../www/command-line-options.html#interpolate">-interpolate <em class="option">method</em></a></td>
 761     <td valign="top">pixel color interpolation method</td>
 762   </tr>
 763
 764   <tr>
 765     <td valign="top"><a href="../www/command-line-options.html#interword-spacing">-interword-spacing <em class="option">value</em></a></td>
 766     <td valign="top">the space between two words</td>
 767   </tr>
 768
 769   <tr>
 770     <td valign="top"><a href="../www/command-line-options.html#kerning">-kerning <em class="option">value</em></a></td>
 771     <td valign="top">the space between two characters</td>
 772   </tr>
 773
 774   <tr>
 775     <td valign="top"><a href="../www/command-line-options.html#label">-label <em class="option">string</em></a></td>
 776     <td valign="top">assign a label to an image</td>
 777   </tr>
 778
 779   <tr>
 780     <td valign="top"><a href="../www/command-line-options.html#lat">-lat <em class="option">geometry</em></a></td>
 781     <td valign="top">local adaptive thresholding</td>
 782   </tr>
 783
 784   <tr>
 785     <td valign="top"><a href="../www/command-line-options.html#layers">-layers <em class="option">method</em></a></td>
 786     <td valign="top">optimize or compare image layers</td>
 787   </tr>
 788
 789   <tr>
 790     <td valign="top"><a href="../www/command-line-options.html#level">-level <em class="option">value</em></a></td>
 791     <td valign="top">adjust the level of image contrast</td>
 792   </tr>
 793
 794   <tr>
 795     <td valign="top"><a href="../www/command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
 796     <td valign="top">pixel cache resource limit</td>
 797   </tr>
 798
 799   <tr>
 800     <td valign="top"><a href="../www/command-line-options.html#linear-stretch">-linear-stretch <em class="option">geometry</em></a></td>
 801     <td valign="top">linear with saturation histogram stretch</td>
 802   </tr>
 803
 804   <tr>
 805     <td valign="top"><a href="../www/command-line-options.html#liquid-rescale">-liquid-rescale <em class="option">geometry</em></a></td>
 806     <td valign="top">rescale image with seam-carving</td>
 807   </tr>
 808
 809   <tr>
 810     <td valign="top"><a href="../www/command-line-options.html#log">-log <em class="option">format</em></a></td>
 811     <td valign="top">format of debugging information</td>
 812   </tr>
 813
 814   <tr>
 815     <td valign="top"><a href="../www/command-line-options.html#loop">-loop <em class="option">iterations</em></a></td>
 816     <td valign="top">add Netscape loop extension to your GIF animation</td>
 817   </tr>
 818
 819   <tr>
 820     <td valign="top"><a href="../www/command-line-options.html#mask">-mask <em class="option">filename</em></a></td>
 821     <td valign="top">associate a mask with the image</td>
 822   </tr>
 823
 824   <tr>
 825     <td valign="top"><a href="../www/command-line-options.html#mattecolor">-mattecolor <em class="option">color</em></a></td>
 826     <td valign="top">frame color</td>
 827   </tr>
 828
 829   <tr>
 830     <td valign="top"><a href="../www/command-line-options.html#median">-median <em class="option">radius</em></a></td>
 831     <td valign="top">apply a median filter to the image</td>
 832   </tr>
 833
 834   <tr>
 835     <td valign="top"><a href="../www/command-line-options.html#modulate">-modulate <em class="option">value</em></a></td>
 836     <td valign="top">vary the brightness, saturation, and hue</td>
 837   </tr>
 838
 839   <tr>
 840     <td valign="top"><a href="../www/command-line-options.html#monitor">-monitor</a></td>
 841     <td valign="top">monitor progress</td>
 842   </tr>
 843
 844   <tr>
 845     <td valign="top"><a href="../www/command-line-options.html#monochrome">-monochrome</a></td>
 846     <td valign="top">transform image to black and white</td>
 847   </tr>
 848
 849   <tr>
 850     <td valign="top"><a href="../www/command-line-options.html#morph">-morph <em class="option">value</em></a></td>
 851     <td valign="top">morph an image sequence</td>
 852   </tr>
 853
 854   <tr>
 855     <td valign="top"><a href="../www/command-line-options.html#morphology">-morphology <em class="option">method</em></a> <em class="option">kernel</em></td>
 856     <td valign="top">apply a morphology method to the image</td>
 857   </tr>
 858
 859   <tr>
 860     <td valign="top"><a href="../www/command-line-options.html#motion-blur">-motion-blur <em class="option">geometry</em></a></td>
 861     <td valign="top">simulate motion blur</td>
 862   </tr>
 863
 864   <tr>
 865     <td valign="top"><a href="../www/command-line-options.html#negate">-negate</a></td>
 866     <td valign="top">replace each pixel with its complementary color </td>
 867   </tr>
 868
 869   <tr>
 870     <td valign="top"><a href="../www/command-line-options.html#noise">-noise <em class="option">radius</em></a></td>
 871     <td valign="top">add or reduce noise in an image</td>
 872   </tr>
 873
 874   <tr>
 875     <td valign="top"><a href="../www/command-line-options.html#normalize">-normalize</a></td>
 876     <td valign="top">transform image to span the full range of colors</td>
 877   </tr>
 878
 879   <tr>
 880     <td valign="top"><a href="../www/command-line-options.html#opaque">-opaque <em class="option">color</em></a></td>
 881     <td valign="top">change this color to the fill color</td>
 882   </tr>
 883
 884   <tr>
 885     <td valign="top"><a href="../www/command-line-options.html#ordered-dither">-ordered-dither <em class="option">NxN</em></a></td>
 886     <td valign="top">ordered dither the image</td>
 887   </tr>
 888
 889   <tr>
 890     <td valign="top"><a href="../www/command-line-options.html#orient">-orient <em class="option">type</em></a></td>
 891     <td valign="top">image orientation</td>
 892   </tr>
 893
 894   <tr>
 895     <td valign="top"><a href="../www/command-line-options.html#page">-page <em class="option">geometry</em></a></td>
 896     <td valign="top">size and location of an image canvas (setting)</td>
 897   </tr>
 898
 899   <tr>
 900     <td valign="top"><a href="../www/command-line-options.html#paint">-paint <em class="option">radius</em></a></td>
 901     <td valign="top">simulate an oil painting</td>
 902   </tr>
 903
 904   <tr>
 905     <td valign="top"><a href="../www/command-line-options.html#ping">-ping</a></td>
 906     <td valign="top">efficiently determine image attributes</td>
 907   </tr>
 908
 909   <tr>
 910     <td valign="top"><a href="../www/command-line-options.html#pointsize">-pointsize <em class="option">value</em></a></td>
 911     <td valign="top">font point size</td>
 912   </tr>
 913
 914   <tr>
 915     <td valign="top"><a href="../www/command-line-options.html#polaroid">-polaroid <em class="option">angle</em></a></td>
 916     <td valign="top">simulate a Polaroid picture</td>
 917   </tr>
 918
 919   <tr>
 920     <td valign="top"><a href="../www/command-line-options.html#posterize">-posterize <em class="option">levels</em></a></td>
 921     <td valign="top">reduce the image to a limited number of color levels</td>
 922   </tr>
 923
 924   <tr>
 925     <td valign="top"><a href="../www/command-line-options.html#precision">-precision <em class="option">value</em></a></td>
 926     <td valign="top">set the maximum number of significant digits to be printed</td>
 927   </tr>
 928
 929   <tr>
 930     <td valign="top"><a href="../www/command-line-options.html#preview">-preview <em class="option">type</em></a></td>
 931     <td valign="top">image preview type</td>
 932   </tr>
 933
 934   <tr>
 935     <td valign="top"><a href="../www/command-line-options.html#print">-print <em class="option">string</em></a></td>
 936     <td valign="top">interpret string and print to console</td>
 937   </tr>
 938
 939   <tr>
 940     <td valign="top"><a href="../www/command-line-options.html#process">-process <em class="option">image-filter</em></a></td>
 941     <td valign="top">process the image with a custom image filter</td>
 942   </tr>
 943
 944   <tr>
 945     <td valign="top"><a href="../www/command-line-options.html#profile">-profile <em class="option">filename</em></a></td>
 946     <td valign="top">add, delete, or apply an image profile</td>
 947   </tr>
 948
 949   <tr>
 950     <td valign="top"><a href="../www/command-line-options.html#quality">-quality <em class="option">value</em></a></td>
 951     <td valign="top">JPEG/MIFF/PNG compression level</td>
 952   </tr>
 953
 954   <tr>
 955     <td valign="top"><a href="../www/command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
 956     <td valign="top">reduce image colors in this colorspace</td>
 957   </tr>
 958
 959   <tr>
 960     <td valign="top"><a href="../www/command-line-options.html#quiet">-quiet</a></td>
 961     <td valign="top">suppress all warning messages</td>
 962   </tr>
 963
 964   <tr>
 965     <td valign="top"><a href="../www/command-line-options.html#radial-blur">-radial-blur <em class="option">angle</em></a></td>
 966     <td valign="top">radial blur the image</td>
 967   </tr>
 968
 969   <tr>
 970     <td valign="top"><a href="../www/command-line-options.html#raise">-raise <em class="option">value</em></a></td>
 971     <td valign="top">lighten/darken image edges to create a 3-D effect</td>
 972   </tr>
 973
 974   <tr>
 975     <td valign="top"><a href="../www/command-line-options.html#random-threshold">-random-threshold <em class="option">low,high</em></a></td>
 976     <td valign="top">random threshold the image</td>
 977   </tr>
 978
 979   <tr>
 980     <td valign="top"><a href="../www/command-line-options.html#red-primary">-red-primary <em class="option">point</em></a></td>
 981     <td valign="top">chromaticity red primary point</td>
 982   </tr>
 983
 984   <tr>
 985     <td valign="top"><a href="../www/command-line-options.html#regard-warnings">-regard-warnings</a></td>
 986     <td valign="top">pay attention to warning messages.</td>
 987   </tr>
 988
 989   <tr>
 990     <td valign="top"><a href="../www/command-line-options.html#region">-region <em class="option">geometry</em></a></td>
 991     <td valign="top">apply options to a portion of the image</td>
 992   </tr>
 993
 994   <tr>
 995     <td valign="top"><a href="../www/command-line-options.html#remap">-remap <em class="option">filename</em></a></td>
 996     <td valign="top">transform image colors to match this set of colors</td>
 997   </tr>
 998
 999   <tr>
1000     <td valign="top"><a href="../www/command-line-options.html#render">-render</a></td>
1001     <td valign="top">render vector graphics</td>
1002   </tr>
1003
1004   <tr>
1005     <td valign="top"><a href="../www/command-line-options.html#repage">-repage <em class="option">geometry</em></a></td>
1006     <td valign="top">size and location of an image canvas</td>
1007   </tr>
1008
1009   <tr>
1010     <td valign="top"><a href="../www/command-line-options.html#resample">-resample <em class="option">geometry</em></a></td>
1011     <td valign="top">change the resolution of an image</td>
1012   </tr>
1013
1014   <tr>
1015     <td valign="top"><a href="../www/command-line-options.html#resize">-resize <em class="option">geometry</em></a></td>
1016     <td valign="top">resize the image</td>
1017   </tr>
1018
1019   <tr>
1020     <td valign="top"><a href="../www/command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
1021     <td valign="top">settings remain in effect until parenthesis boundary.</td>
1022   </tr>
1023
1024   <tr>
1025     <td valign="top"><a href="../www/command-line-options.html#roll">-roll <em class="option">geometry</em></a></td>
1026     <td valign="top">roll an image vertically or horizontally</td>
1027   </tr>
1028
1029   <tr>
1030     <td valign="top"><a href="../www/command-line-options.html#rotate">-rotate <em class="option">degrees</em></a></td>
1031     <td valign="top">apply Paeth rotation to the image</td>
1032   </tr>
1033
1034   <tr>
1035     <td valign="top"><a href="../www/command-line-options.html#sample">-sample <em class="option">geometry</em></a></td>
1036     <td valign="top">scale image with pixel sampling</td>
1037   </tr>
1038
1039   <tr>
1040     <td valign="top"><a href="../www/command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
1041     <td valign="top">horizontal and vertical sampling factor</td>
1042   </tr>
1043
1044   <tr>
1045     <td valign="top"><a href="../www/command-line-options.html#scale">-scale <em class="option">geometry</em></a></td>
1046     <td valign="top">scale the image</td>
1047   </tr>
1048
1049   <tr>
1050     <td valign="top"><a href="../www/command-line-options.html#scene">-scene <em class="option">value</em></a></td>
1051     <td valign="top">image scene number</td>
1052   </tr>
1053
1054   <tr>
1055     <td valign="top"><a href="../www/command-line-options.html#seed">-seed <em class="option">value</em></a></td>
1056     <td valign="top">seed a new sequence of pseudo-random numbers</td>
1057   </tr>
1058
1059   <tr>
1060     <td valign="top"><a href="../www/command-line-options.html#segment">-segment <em class="option">values</em></a></td>
1061     <td valign="top">segment an image</td>
1062   </tr>
1063
1064   <tr>
1065     <td valign="top"><a href="../www/command-line-options.html#threshold">-selective-blur <em class="option">geometry</em></a></td>
1066     <td valign="top">selectively blur pixels within a contrast threshold</td>
1067   </tr>
1068
1069   <tr>
1070     <td valign="top"><a href="../www/command-line-options.html#separate">-separate</a></td>
1071     <td valign="top">separate an image channel into a grayscale image</td>
1072   </tr>
1073
1074   <tr>
1075     <td valign="top"><a href="../www/command-line-options.html#sepia-tone">-sepia-tone <em class="option">threshold</em></a></td>
1076     <td valign="top">simulate a sepia-toned photo</td>
1077   </tr>
1078
1079   <tr>
1080     <td valign="top"><a href="../www/command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
1081     <td valign="top">set an image attribute</td>
1082   </tr>
1083
1084   <tr>
1085     <td valign="top"><a href="../www/command-line-options.html#shade">-shade <em class="option">degrees</em></a></td>
1086     <td valign="top">shade the image using a distant light source</td>
1087   </tr>
1088
1089   <tr>
1090     <td valign="top"><a href="../www/command-line-options.html#shadow">-shadow <em class="option">geometry</em></a></td>
1091     <td valign="top">simulate an image shadow</td>
1092   </tr>
1093
1094   <tr>
1095     <td valign="top"><a href="../www/command-line-options.html#sharpen">-sharpen <em class="option">geometry</em></a></td>
1096     <td valign="top">sharpen the image</td>
1097   </tr>
1098
1099   <tr>
1100     <td valign="top"><a href="../www/command-line-options.html#shave">-shave <em class="option">geometry</em></a></td>
1101     <td valign="top">shave pixels from the image edges</td>
1102   </tr>
1103
1104   <tr>
1105     <td valign="top"><a href="../www/command-line-options.html#shear">-shear <em class="option">geometry</em></a></td>
1106     <td valign="top">slide one edge of the image along the X or Y axis</td>
1107   </tr>
1108
1109   <tr>
1110     <td valign="top"><a href="../www/command-line-options.html#sigmoidal">-sigmoidal-contrast <em class="option">geometry</em></a></td>
1111     <td valign="top">increase the contrast without saturating highlights or shadows</td>
1112   </tr>
1113
1114   <tr>
1115     <td valign="top"><a href="../www/command-line-options.html#smush">-smush <em class="option">offset</em></a></td>
1116     <td valign="top">smush an image sequence together</td>
1117   </tr>
1118
1119   <tr>
1120     <td valign="top"><a href="../www/command-line-options.html#size">-size <em class="option">geometry</em></a></td>
1121     <td valign="top">width and height of image</td>
1122   </tr>
1123
1124   <tr>
1125     <td valign="top"><a href="../www/command-line-options.html#sketch">-sketch <em class="option">geometry</em></a></td>
1126     <td valign="top">simulate a pencil sketch</td>
1127   </tr>
1128
1129   <tr>
1130     <td valign="top"><a href="../www/command-line-options.html#solarize">-solarize <em class="option">threshold</em></a></td>
1131     <td valign="top">negate all pixels above the threshold level</td>
1132   </tr>
1133
1134   <tr>
1135     <td valign="top"><a href="../www/command-line-options.html#splice">-splice <em class="option">geometry</em></a></td>
1136     <td valign="top">splice the background color into the image</td>
1137   </tr>
1138
1139   <tr>
1140     <td valign="top"><a href="../www/command-line-options.html#spread">-spread <em class="option">radius</em></a></td>
1141     <td valign="top">displace image pixels by a random amount</td>
1142   </tr>
1143
1144   <tr>
1145     <td valign="top"><a href="../www/command-line-options.html#strip">-strip</a></td>
1146     <td valign="top">strip image of all profiles and comments</td>
1147   </tr>
1148
1149   <tr>
1150     <td valign="top"><a href="../www/command-line-options.html#stroke">-stroke <em class="option">color</em></a></td>
1151     <td valign="top">graphic primitive stroke color</td>
1152   </tr>
1153
1154   <tr>
1155     <td valign="top"><a href="../www/command-line-options.html#strokewidth">-strokewidth <em class="option">value</em></a></td>
1156     <td valign="top">graphic primitive stroke width</td>
1157   </tr>
1158
1159   <tr>
1160     <td valign="top"><a href="../www/command-line-options.html#stretch">-stretch <em class="option">type</em></a></td>
1161     <td valign="top">render text with this font stretch</td>
1162   </tr>
1163
1164   <tr>
1165     <td valign="top"><a href="../www/command-line-options.html#style">-style <em class="option">type</em></a></td>
1166     <td valign="top">render text with this font style</td>
1167   </tr>
1168
1169   <tr>
1170     <td valign="top"><a href="../www/command-line-options.html#swap">-swap <em class="option">indexes</em></a></td>
1171     <td valign="top">swap two images in the image sequence</td>
1172   </tr>
1173
1174   <tr>
1175     <td valign="top"><a href="../www/command-line-options.html#swirl">-swirl <em class="option">degrees</em></a></td>
1176     <td valign="top">swirl image pixels about the center</td>
1177   </tr>
1178
1179   <tr>
1180     <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
1181     <td valign="top">synchronize image to storage device</td>
1182   </tr>
1183
1184   <tr>
1185     <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
1186     <td valign="top">mark the image as modified</td>
1187   </tr>
1188
1189   <tr>
1190     <td valign="top"><a href="../www/command-line-options.html#texture">-texture <em class="option">filename</em></a></td>
1191     <td valign="top">name of texture to tile onto the image background</td>
1192   </tr>
1193
1194   <tr>
1195     <td valign="top"><a href="../www/command-line-options.html#threshold">-threshold <em class="option">value</em></a></td>
1196     <td valign="top">threshold the image</td>
1197   </tr>
1198
1199   <tr>
1200     <td valign="top"><a href="../www/command-line-options.html#thumbnail">-thumbnail <em class="option">geometry</em></a></td>
1201     <td valign="top">create a thumbnail of the image</td>
1202   </tr>
1203
1204   <tr>
1205     <td valign="top"><a href="../www/command-line-options.html#tile">-tile <em class="option">filename</em></a></td>
1206     <td valign="top">tile image when filling a graphic primitive</td>
1207   </tr>
1208
1209   <tr>
1210     <td valign="top"><a href="../www/command-line-options.html#tile-offset">-tile-offset <em class="option">geometry</em></a></td>
1211     <td valign="top">set the image tile offset</td>
1212   </tr>
1213
1214   <tr>
1215     <td valign="top"><a href="../www/command-line-options.html#tint">-tint <em class="option">value</em></a></td>
1216     <td valign="top">tint the image with the fill color</td>
1217   </tr>
1218
1219   <tr>
1220     <td valign="top"><a href="../www/command-line-options.html#transform">-transform</a></td>
1221     <td valign="top">affine transform image</td>
1222   </tr>
1223
1224   <tr>
1225     <td valign="top"><a href="../www/command-line-options.html#transparent">-transparent <em class="option">color</em></a></td>
1226     <td valign="top">make this color transparent within the image</td>
1227   </tr>
1228
1229   <tr>
1230     <td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
1231     <td valign="top">transparent color</td>
1232   </tr>
1233
1234   <tr>
1235     <td valign="top"><a href="../www/command-line-options.html#transpose">-transpose</a></td>
1236     <td valign="top">flip image in the vertical direction and rotate 90 degrees</td>
1237   </tr>
1238
1239   <tr>
1240     <td valign="top"><a href="../www/command-line-options.html#transverse">-transverse</a></td>
1241     <td valign="top">flop image in the horizontal direction and rotate 270 degrees</td>
1242   </tr>
1243
1244   <tr>
1245     <td valign="top"><a href="../www/command-line-options.html#treedepth">-treedepth <em class="option">value</em></a></td>
1246     <td valign="top">color tree depth</td>
1247   </tr>
1248
1249   <tr>
1250     <td valign="top"><a href="../www/command-line-options.html#trim">-trim</a></td>
1251     <td valign="top">trim image edges</td>
1252   </tr>
1253
1254   <tr>
1255     <td valign="top"><a href="../www/command-line-options.html#type">-type <em class="option">type</em></a></td>
1256     <td valign="top">image type</td>
1257   </tr>
1258
1259   <tr>
1260     <td valign="top"><a href="../www/command-line-options.html#undercolor">-undercolor <em class="option">color</em></a></td>
1261     <td valign="top">annotation bounding box color</td>
1262   </tr>
1263
1264   <tr>
1265     <td valign="top"><a href="../www/command-line-options.html#unique-colors">-unique-colors</a></td>
1266     <td valign="top">discard all but one of any pixel color.</td>
1267   </tr>
1268
1269   <tr>
1270     <td valign="top"><a href="../www/command-line-options.html#units">-units <em class="option">type</em></a></td>
1271     <td valign="top">the units of image resolution</td>
1272   </tr>
1273
1274   <tr>
1275     <td valign="top"><a href="../www/command-line-options.html#unsharp">-unsharp <em class="option">geometry</em></a></td>
1276     <td valign="top">sharpen the image</td>
1277   </tr>
1278
1279   <tr>
1280     <td valign="top"><a href="../www/command-line-options.html#verbose">-verbose</a></td>
1281     <td valign="top">print detailed information about the image</td>
1282   </tr>
1283
1284   <tr>
1285     <td valign="top"><a href="../www/command-line-options.html#version">-version</a></td>
1286     <td valign="top">print version information</td>
1287   </tr>
1288
1289   <tr>
1290     <td valign="top"><a href="../www/command-line-options.html#view">-view</a></td>
1291     <td valign="top">FlashPix viewing transforms</td>
1292   </tr>
1293
1294   <tr>
1295     <td valign="top"><a href="../www/command-line-options.html#vignette">-vignette <em class="option">geometry</em></a></td>
1296     <td valign="top">soften the edges of the image in vignette style</td>
1297   </tr>
1298
1299   <tr>
1300     <td valign="top"><a href="../www/command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
1301     <td valign="top">access method for pixels outside the boundaries of the image</td>
1302   </tr>
1303
1304   <tr>
1305     <td valign="top"><a href="../www/command-line-options.html#wave">-wave <em class="option">geometry</em></a></td>
1306     <td valign="top">alter an image along a sine wave</td>
1307   </tr>
1308
1309   <tr>
1310     <td valign="top"><a href="../www/command-line-options.html#weight">-weight <em class="option">type</em></a></td>
1311     <td valign="top">render text with this font weight</td>
1312   </tr>
1313
1314   <tr>
1315     <td valign="top"><a href="../www/command-line-options.html#white-point">-white-point <em class="option">point</em></a></td>
1316     <td valign="top">chromaticity white point</td>
1317   </tr>
1318
1319   <tr>
1320     <td valign="top"><a href="../www/command-line-options.html#white-threshold">-white-threshold <em class="option">value</em></a></td>
1321     <td valign="top">force all pixels above the threshold into white</td>
1322   </tr>
1323
1324   <tr>
1325     <td valign="top"><a href="../www/command-line-options.html#write">-write <em class="option">filename</em></a></td>
1326     <td valign="top">write images to this file</td>
1327   </tr>
1328
1329   </tbody>
1330 </table>
1331
1332 </div>
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