PNG Image Optimization

[Alejandro Tejada]

Hi Scott,

on Sat, 10 Aug 2013 13:17:14 -0700
Scott Rossi wrote:

> in my experience, all of the options you cite
> will usually work only if the colors of your source image
> can comfortably fit within a range of 256 colors.
> Images that are primarily solid colors or have
> very complex patterns where dithering isn't
> apparent are good candidates for reducing to 8 bit.
> Photographic images with wide ranges of color
> will often display visual artifacts when their color is
> reduced to 8 bits, so the end result is not better
> than the original.

Many Thanks, Scott, for answering this request.

Did you test optimizing this image:

http://upload.wikimedia.org/wikipedia/common/b/bc/Gluecksklee_(transparent_background).png

in each one of these websites?

http://www.8bitalpha.com/
http://tinypng.org/
http://compresspng.com/

In my tests, 8bitalpha.com always produces
a smaller image and reduces the visible
white artifacts around the transparent png.

Al