Batch Lossy JPG And PNG Compression Script Using GraphicsMagick

<div style="text-align: justify;"><b>WebUpd8 reader Bruce Ingalls has created a script for batch lossy compression of jpg and png files</b>. The script is useful if you have a lot of images - e.g., you can run it to compress all the images used by a website, etc.</div><br /><div style="text-align: justify;">The script compresses only the files for which the resulted compressed image is detected to be smaller than the original image file. It uses GraphicsMagick which Bruce says is better for compression than ImageMagick (~1.5% smaller images with GraphicsMagick than with ImageMagick) and also faster, when compressing a large number of images. </div><br /><br /><a name='more'></a><div style="text-align: justify;">Also, the script doesn't overwrite the original files and instead, it places the compressed images under a folder called "compressed". You can configure the compressed directory path/name, the compression ratio (40 by default) and the png compression ratio of transparent background (05 by default) by editing the script.</div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">GraphicsMagick cannot handle gif files, so it converts such files to png.</div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">The compressLossy script doesn't do magick so don't expect png files to be a lot smaller after compression (the compression should be more obvious for jpg files). But it makes a difference if you're compressing a large amount of files.</div><br /><div style="text-align: center;"><a href="http://img.netupd8.com/mc-compression-result.png"><img alt="image compression result mc" src="http://img.netupd8.com/mc-compression-result_thumb.png" /></a></div><br /><br /><h2>Download compressLossy</h2><div style="text-align: justify;"><br /></div><div style="text-align: justify;"><b>You can download the compressLossy script from <a href="https://github.com/bingalls/webGraphicsMagick">GitHub</a> - here's a <a href="https://raw.github.com/bingalls/webGraphicsMagick/master/compressLossy.sh">direct link</a> </b>to the script (tip: Bruce's GitHub repository also has a script called "apple-touch.sh" which generates Apple iPad/iPhone favicons).</div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">To be able to use the compressLossy script, install GraphicsMagick - in Ubuntu, use the following command:</div><pre class="linux-code"><code>sudo apt-get install graphicsmagick</code></pre><br /><div style="text-align: justify;">Then, place the script in a folder containing png/jpg files, make the script executable and run it.<br /><br /><br /><div style="text-align: right;"><i>thanks to Bruce Ingalls for the script and info! </i></div></div>

Batch Lossy JPG And PNG Compression Script Using GraphicsMagick

WebUpd8 reader Bruce Ingalls has created a script for batch lossy compression of jpg and png files . The script is useful if you have a lot ...

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