Comments on: Optimizing PNG Files, for both Web and Print. http://www.useragentman.com/blog/2009/09/16/optimizing-png-files-for-both-web-and-print/ A Blog about Client Side Web Technology Wed, 08 Sep 2010 09:00:27 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Brian Tao http://www.useragentman.com/blog/2009/09/16/optimizing-png-files-for-both-web-and-print/comment-page-1/#comment-10 Brian Tao Wed, 30 Sep 2009 13:52:09 +0000 http://www.useragentman.com/blog/?p=3#comment-10 If you're running Windows Vista or 7 and want to produce really snazzy screencaps that include the Aero Glass effects, Window Clippings (http://windowclippings.com/) is a great utility. It correctly captures the alpha channel of translucent window chrome, rounded corners, and drop shadows. I don't know if I can embed images in comments here, but here's a sample PNG: http://luxography.ca/tmp/alpha_channel_screenshot.png If you’re running Windows Vista or 7 and want to produce really snazzy screencaps that include the Aero Glass effects, Window Clippings (http://windowclippings.com/) is a great utility. It correctly captures the alpha channel of translucent window chrome, rounded corners, and drop shadows.

I don’t know if I can embed images in comments here, but here’s a sample PNG: http://luxography.ca/tmp/alpha_channel_screenshot.png

]]> By: Oliver http://www.useragentman.com/blog/2009/09/16/optimizing-png-files-for-both-web-and-print/comment-page-1/#comment-6 Oliver Mon, 28 Sep 2009 18:04:38 +0000 http://www.useragentman.com/blog/?p=3#comment-6 OptiPNG is a pretty magical tool, and perfect for batch processing. When I'm editing single images, though, I find that the GIMP already optimizes PNGs pretty well, sometimes within a percentage point or two of OptiPNG's best (-o7), especially on smaller files. GIMP seems to save quite a lot faster than OptiPNG, too. Before I knew about OptiPNG, GIMP helped me slim down several PNGs from (AFAIK) Photoshop. Each had only 448 pixels, but they were somehow using 38KB each! They trimmed down nicely to a couple hundred bytes each. I'm not sure where the extra 99% of the space was being used, but I'm glad it's gone now. Both are great tools to have in the toolbox. If I had another batch of images to trim, I'd probably use OptiPNG. OptiPNG is a pretty magical tool, and perfect for batch processing. When I’m editing single images, though, I find that the GIMP already optimizes PNGs pretty well, sometimes within a percentage point or two of OptiPNG’s best (-o7), especially on smaller files. GIMP seems to save quite a lot faster than OptiPNG, too.

Before I knew about OptiPNG, GIMP helped me slim down several PNGs from (AFAIK) Photoshop. Each had only 448 pixels, but they were somehow using 38KB each! They trimmed down nicely to a couple hundred bytes each. I’m not sure where the extra 99% of the space was being used, but I’m glad it’s gone now.

Both are great tools to have in the toolbox. If I had another batch of images to trim, I’d probably use OptiPNG.

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