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Cristy committed Aug 24, 2024
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Expand Up @@ -2520,7 +2520,7 @@ <h3>Image Type when Reading and Writing</h3>The "<code><a href="https://imagemag
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<a name="image_quality" id="image_quality"></a>
<h2>Controling the Quality of Images</h2><a name="depth" id="depth"></a>
<h3>Depth - File Format Bit Depth</h3><b>Quality and Depth</b> are two terms are often talked about in Mailing Lists and in these example pages, so I'd like to explain them a little. <i>Quality</i> is a compile time setting in ImageMagick, and is used to determine the size of the values use to store images in IM memory and during processing. Basically it means the <b>Quality of Processing</b> that a specific IM was compiled for. The <i>Depth</i> is the size of the values used when an image is either read or saved to/from an Image File Format. It is as such more highly variable. and controlled by the "<code><a href="https://imagemagick.org/script/command-line-options.php?#depth">-depth</a></code>" setting, or by the original 'depth' of the image that was read in. More on this in a moment. Remember...
<h3>Depth - File Format Bit Depth</h3><b>Quality and Depth</b> are two terms are often talked about in the discussion formums and in these example pages, so I'd like to explain them a little. <i>Quality</i> is a compile time setting in ImageMagick, and is used to determine the size of the values use to store images in IM memory and during processing. Basically it means the <b>Quality of Processing</b> that a specific IM was compiled for. The <i>Depth</i> is the size of the values used when an image is either read or saved to/from an Image File Format. It is as such more highly variable. and controlled by the "<code><a href="https://imagemagick.org/script/command-line-options.php?#depth">-depth</a></code>" setting, or by the original 'depth' of the image that was read in. More on this in a moment. Remember...
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<b>Quality is 'in memory' value size, and is compiled into IM.<br>
Depth is file format value size, and is variable.</b>
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