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Glenn Randers-Pehrson

Coauthor of PNG spec, developer/maintainer of libpng, on development teams for ImageMagick and GraphicsMagick. Author of pngcrush. Maintains PNG support in Firefox. Retired, father of four, grandfather of fifteen.

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31 How do I keep track of many, many clients in a single shoot (like a school portrait day)? Oct 19 '15
6 How do I convert multiple JPG images to PNG at once in Photoshop? Aug 7 '16
5 Who took this picture of a Concorde during the 1973 eclipse, and how? Oct 12 '16
2 A poster with 300 faces Sep 26 '16
1 What are the benefits of using GPS tagging? Jan 23 '17

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