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<p class="lead magick-description">There are copious amounts of extra data associated with images (metadata), beyond the actual image pixels. This metadata can be useful, either for display, or for various calculations, or in modifying the behavior of later image processing operations. You can utilize percent escapes in a number of options, for example in <a href="command-line-options.html#format_identify_">-format</a> or in montage <a href="command-line-options.html#label" >-label</a>, to print various properties and other settings associated with an image.</p>
</td></tr>
</table></div>
-<h3 class="magick-header">Percent Escape Handling</h3>
+<h3>Percent Escape Handling</h3>
<p>If you request a percent escape such as <code>%[key]</code> the setting
is looked for in the following order until the first match has been
free-form string tables directly, allowing you to override the above sequence,
and avoid accessing an attribute or property of the same name.</p>
-<pre>
-%[artifact:<var>setting</var>]
+<pre class="highlight"><code>%[artifact:<var>setting</var>]
%[option:<var>setting</var>]
-</pre>
+</code></pre>
-<h3 class="magick-header">Single Letter Attribute Percent Escapes</h3>
+<h3>Single Letter Attribute Percent Escapes</h3>
<p>Here are common single letter escapes (short form) is used to report the most
common attributes and properties of an image, such as: the image filename
filename, type, width, height. </p>
<div class="table-responsive">
-<table class="table table-condensed table-striped">
+<table class="table table-sm table-striped">
<tr>
<td>\n</td>
<td>newline</td>
</tr>
<tr>
<td>%b</td>
- <td>file size of image read in</td>
+ <td>file size of image read in (use <a href="escape.html#precision">-precision</a> 16 to force results in B)</td>
</tr>
<tr>
<td>%c</td>
<td>%A</td>
<td>image transparency channel enabled (true/false)</td>
</tr>
+ <tr>
+ <td>%B</td>
+ <td>file size of image read in bytes</td>
+ </tr>
<tr>
<td>%C</td>
<td>image compression type</td>
<p>Here is a sample command and its output for an image with filename
<code>bird.miff</code> and whose width is 512 and height is 480.</p>
-<pre>
--> identify -format "%m:%f %wx%h" bird.miff
+<pre class="highlight"><code>-> identify -format "%m:%f %wx%h" bird.miff
MIFF:bird.miff 512x480
-</pre>
+</code></pre>
<p>Note that all single letter percent escapes can also be used using long
form (from IM version 6.7.6-9, see next). For example <code>%[f]</code> is
<p>Also be warned that calculated attributes can take some time to generate,
especially for large images.</p>
-<h3 class="magick-header">Long Form Attribute Percent Escapes</h3>
+<h3>Long Form Attribute Percent Escapes</h3>
<p>In addition to the above specific and calculated attributes are recognized
when enclosed in braces (long form):</p>
<div class="table-responsive">
-<table class="table table-condensed table-striped">
+<table class="table table-sm table-striped">
<tr>
- <td>%[base]</td>
+ <td>%[basename]</td>
<td>base filename, no suffixes (as %t)</td>
</tr>
+ <tr>
+ <td>%[bit-depth]</td>
+ <td>Actual bit-depth of the pixel data</td>
+ </tr>
+ <tr>
+ <td>%[caption]</td>
+ <td>caption meta-data property</td>
+ </tr>
+ <tr>
+ <td>%[caption:pointsize]</td>
+ <td>returns the pointsize computed during caption: processing (as of IM 6.9.1-0)</td>
+ </tr>
<tr>
<td>%[channels]</td>
<td>??? channels in use - colorspace ???</td>
</tr>
+ <tr>
+ <td>%[colors]</td>
+ <td>Number of unique colors in the image (as of IM 7.0.3.8)</td>
+ </tr>
<tr>
<td>%[colorspace]</td>
- <td>Colorspace of Image Data (excluding transparency)</td>
+ <td>colorspace of Image Data (excluding transparency)</td>
+ </tr>
+ <tr>
+ <td>%[compose]</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>%[compression]</td>
+ <td>image compression type (as of IM 6.9.6-6)</td>
</tr>
<tr>
<td>%[copyright]</td>
<td>%[height]</td>
<td>original height of image (when it was read in)</td>
</tr>
+ <tr>
+ <td>%[input]</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>%[interlace]</td>
+ <td>Image interlace mode (as of IM 7.0.3.8)</td>
+ </tr>
<tr>
<td>%[kurtosis]</td>
<td>CALCULATED: kurtosis statistic of image</td>
<tr>
<td>%[label]</td>
<td>label meta-data property</td>
+ </tr>
+ <tr>
+ <td>%[label:pointsize]</td>
+ <td>returns the pointsize computed during label: processing (as of IM 6.9.1-0)</td>
</tr>
<tr>
<td>%[magick]</td>
<td>%[min]</td>
<td>CALCULATED: minimum value statistic of image</td>
</tr>
- <tr>
- <td>%[name]</td>
- <td>The original name of the image</td>
- </tr>
<tr>
<td>%[opaque]</td>
<td>CALCULATED: is image fully-opaque?</td>
<td>%[profiles]</td>
<td>list of any embedded profiles</td>
</tr>
+ <tr>
+ <td>%[quality]</td>
+ <td>Image quality value (as of IM 7.0.3.8)</td>
+ </tr>
+ <tr>
+ <td>%[rendering-intent]</td>
+ <td>Image rendering intent (as of IM 7.0.3.8)</td>
+ </tr>
<tr>
<td>%[resolution.x]</td>
<td>X density (resolution) without units</td>
</tr>
</table></div>
-<h3 class="magick-header">Properties</h3>
+<h3>Properties</h3>
<p>All other long forms of percent escapes (not single letter long form) are
handled in a case insensitive manner. Such escapes will will attempt to look
images when write, if the image file format allows. </p>
-<h3 class="magick-header">Artifacts and Options</h3>
+<h3>Artifacts and Options</h3>
<p>The previous percent escapes are associated with the primary Attributes and
Properties. Which is the original and primary focus of such percent escapes.
Artifact. </p>
-<h3 class="magick-header">Glob-Pattern Listing of Properties, Artifacts and Options</h3>
+<h3>Glob-Pattern Listing of Properties, Artifacts and Options</h3>
<p>The <var>setting</var> can contain a glob pattern. As such you can
now list all free-form string properties, artifacts, and options, (but not
specific image attributes) using...</p>
-<pre>
-convert ... \
+<pre class="highlight"><code>convert ... \
-print "__Properties__\n%[*]" \
-print "__Artifacts__\n%[artifact:*]" \
-print "__Options__\n%[option:*]" \
...
-</pre>
+</code></pre>
<p> The format of glob patterns are very specific and as such is generally
only used to list specific settings, such as when debugging, rather than being
used for image processing use. </p>
-<h3 class="magick-header">Calculated Percent Escape Prefixes</h3>
+<h3>Calculated Percent Escape Prefixes</h3>
<p>There are some special prefixes (before the first ':') which performs
calculations based on the user provided string that follows that prefix. For
example you can do a numerical calculation use <code>%[fx:...]</code> to
evaluate the given <a href="fx.html">FX</a> expressions:</p>
-<pre>
-%[fx:<var>expression</var>]
-</pre>
+<pre class="highlight"><code>%[fx:<var>expression</var>]
+</code></pre>
-<p>Use <code>pixel:</code> to evaluate a pixel color as defined by the <a
+<p>Use <code>pixel:</code>
or <code>hex:</code> to evaluate a pixel color as defined by the <a
href="fx.html">FX</a>
expression:</p>
-<pre>
-%[pixel:<var>expression</var>]
-</pre>
+<pre class="highlight"><code>%[pixel:<var>expression</var>]
+</code></pre>
-<h3 class="magick-header">Specific Profile Percent Escape Prefixes</h3>
+<h3>Specific Profile Percent Escape Prefixes</h3>
<p>You can also use the following special formatting syntax to print EXIF
mage meta-data that was included in the image read in:</p>
-<pre>
-%[EXIF:<var>tag</var>]
-</pre>
+<pre class="highlight"><code>%[EXIF:<var>tag</var>]
+</code></pre>
<p>Choose <var>tag</var> from the following:</p>
-<pre class="pre-scrollable">
+<pre class="pre-scrollable"><code>
* (print all EXIF tags, in keyword=data format)
! (print all EXIF tags, in tag_number data format)
#hhhh (print data for EXIF tag #hhhh)
SensingMethod
FileSource
SceneType
-</pre>
+</code></pre>
<br/>
<p>Surround the format specification with quotation marks to prevent your
shell from misinterpreting any spaces and square brackets.</p>
<p>The following special formatting syntax can be used to print IPTC
information contained in the file:</p>
-<pre>
-%[IPTC:<var>dataset</var>:<var>record</var>]
-</pre>
+<pre class="highlight"><code>%[IPTC:<var>dataset</var>:<var>record</var>]
+</code></pre>
<p>Select <var>dataset</var> and <var>record</var> from the following:</p>
Post ObjectData Descriptor Record
9:10 Confirmed ObjectData Size
-</pre>
+</code></pre>
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