QUOTE(Alan Smith @ Jul 21 2012, 12:15 PM)
The PNG format is not a new format of images. But there are numbers of reasons why it is more popular and are best image format among other formats. The reasons are as under:
Because of the support of semi-transparent pixels of PNG, it can be saved with soft drop shadow and floated over any background. You can use it as watermark on a textured or background.
PNG images never degrade in quality in comparison to other formats because it displays full color photographic images and also supports a managed color palette.
As PNG images can be saved with built-in gamma correction, it automatically adjusts brightness and contrast according to OSs gamma settings so it looks correct on a various monitors and operating systems.
Thanks for sharing the nice information, i would like to share further that PNG supports palette-based images with palettes of 24-bit RGB or 32-bit RGBA colors, grayscale images and full-color non-palette-based RGB images.PNG was designed for transferring images on the Internet, not for professional-quality print graphics, and
therefore does not support non-RGB color spaces such as CMYK.