Go The difference between PNG8 and PNG24

First we need to know:

the fundamental difference between 1.PNG8 and Png24 is not the difference between color bits, but the way they are stored.

The 2.PNG8 has a 1-bit Boolean transparent channel (either completely transparent or completely opaque), andPng24 has a 8-bit (256-Step) Boolean transparent channel (so-called translucent).

There are some similarities between png-8 and GIF, which are indexed colors, support only pixel-level pure transparency, and do not support alpha transparency.

What we usually call "IE6 does not support PNG transparency" refers to the transparency that does not support PNG-24. But IE6 supports PNG-8 transparency, just as it supports gif transparency.

So we have a direction at work:

1. Color-rich, large images are cut into JPG;
2. Small size, the color is not rich and the background transparent cut into gif or Png8;
3. Translucent cut into png24.  

Back to the question at the beginning of this article, How to differentiate (the simplest of 2 ways):

1. Look at the image ---mode in PS,Png8 of course only 8 bits /channel.

2. When you open the Png8 picture,PS will default to its image title with "index" word,png24 is not.

3. File attribute details.

Original:

Http://www.cnblogs.com/snowinmay/archive/2013/04/25/3043550.html

Refer to:

About GIF picture (or PNG8) edge aliasing--Zhang Xin Xu

http://www.zhangxinxu.com/wordpress/2009/09/%E5%85%B3%E4%BA%8Egif%E5%9B%BE%E7%89%87%EF%BC%88%E6%88%96png8%EF% bc%89%e6%9d%82%e8%be%b9%e9%94%af%e9%bd%bf%e7%9a%84%e9%97%ae%e9%a2%98/

[Differences between]png8 and PNG24