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<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>compare -metric PSNR rose.jpg reconstruct.jpg difference.png</span><span class='crtout'>28.31</span></p>
<p>If the reconstructed image is a subimage of the image, the compare program returns the best match offset. In addition, it returns a similarity image such that an exact match location is completely white and if none of the pixels match, black, otherwise some gray level in-between:</p>
-<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>compare -metric RMSE logo.png wizard.jpg similarity.gif</span><span class='crtout'>85.05 (0.00129778) @ 353,157</span></p>
+<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>compare -metric RMSE -subimage-search logo.png wizard.jpg similarity.gif</span><span class='crtout'>85.05 (0.00129778) @ 353,157</span></p>
<p>You can find additional examples of using <kbd>compare</kbd> in <a href="http://www-106.ibm.com/developerworks/library/l-graf/?ca=dnt-428">Graphics from the Command Line</a>. Further discussion is available in <a href="http://www-106.ibm.com/developerworks/library/l-graf2/?ca=dgr-lnxw15GraphicsLine">More Graphics from the Command Line</a> and <a href="http://www.imagemagick.org/Usage/">Examples of ImageMagick Usage</a>.</p>
<div style="margin: auto;">
<tr>
<td valign="top"><a href="../www/command-line-options.html#disimilarity-threshold">-disimilarity-threshold <em class="option">value</em></a></td>
- <td valign="top">maximum RMSE for (sub)image match (default 0.2)</td>
+ <td valign="top">maximum distortion for (sub)image match (default 0.2)</td>
</tr>
<tr>
<td valign="top">width and height of image</td>
</tr>
+ <tr>
+ <td valign="top"><a href="../www/command-line-options.html#subimage-search">-subimage-search</a></td>
+ <td valign="top">search for subimage</td>
+ </tr>
+
+ <tr>
+ <td valign="top"><a href="../www/command-line-options.html#synchronize">-synchronize</a></td>
+ <td valign="top">synchronize image to storage device</td>
+ </tr>
+
+ <tr>
+ <td valign="top"><a href="../www/command-line-options.html#taint">-taint</a></td>
+ <td valign="top">mark the image as modified</td>
+ </tr>
+
<tr>
<td valign="top"><a href="../www/command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
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