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Graphic Design
Glenn Randers-Pehrson's user avatar
Glenn Randers-Pehrson's user avatar
Glenn Randers-Pehrson's user avatar
Glenn Randers-Pehrson
  • Member for 10 years, 5 months
  • Last seen more than 6 years ago
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About

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.

profile for Glenn Randers-Pehrson on Stack Exchange, a network of free, community-driven Q&A sites.

LICENSE: All my StackExchange contributions across all sites, except as noted within any particular contribution, are available under the standard SO/SE licensing terms (CC-BY-SA) or under the CC-0 Public Domain Dedication, at your choice.

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Top posts
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19
How to crop a JPEG without recompressing?
Jul 7, 2015
answer
12
Why does a JPEGs file size increase after cropping and saving for web in Photoshop?
Apr 24, 2015
answer
9
What is the difference between PNG and PNG8?
Sep 5, 2016
answer
6
Can I reduce the file size of an SVG to be closer to its JPEG equivalent?
Apr 8, 2015
answer
5
What is the purpose of embedding a color profile when saving an image?
Jun 19, 2014
answer
5
Why are the text and boundaries / edges of graphics blurry in this image, and how can I fix it?
Sep 13, 2014
answer
5
What is a bevel join of two lines exactly (Illustrator)?
Sep 3, 2015
answer
5
Horizontally flip a lot of pictures in GIMP
Oct 26, 2016
answer
5
Imagemagick: how to compare two images and obtain a third image with the differences?
Jan 7, 2017
answer
4
Improving the quality of a picture taken at night
Sep 16, 2016
Top network posts
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264
libpng warning: iCCP: known incorrect sRGB profile
123
I lost the source code for programs I released as GPL. What to do?
36
Dither a Grayscale Image
31
How do I keep track of many, many clients in a single shoot (like a school portrait day)?
31
Find out if PNG is 8 or 24?