jpegv9源码

The only major new feature in jpeg-9 relative to jpeg-8 is a new color transform for the "Lossless SmartScale" format. SmartScale is a non-standard format (it was rejected by the ITU-T) that was introduced in jpeg-8, and our own research has revealed that, in general, it does not accomplish anything that can't already be accomplished with existing, standard formats (such as PNG, webp, baseline JPEG, or JPEG with arithmetic coding.)