Re:Pngquant – Lossy PNG compressor
by pornel on Monday January 13, 2014 @10:00AM
(#7050890)
It produces same type of file PNG8, but:
* pngquant has adaptive dithering which compresses better and makes less noisy images
* pngquant has more predictable algorithm and usually gives better quality (pngquant aims for minimum square error and guarantees local optimum, while pngnq has neural net algorithm that sometimes works well, sometimes misses details or generates useless palette entries)
* pngquant can automatically choose number of colors required for desired quality and leave 24-bit image if it requires too many colors.
* pngquant's algorithm is available as embeddable libimagequant
* pngquant has adaptive dithering which compresses better and makes less noisy images
* pngquant has more predictable algorithm and usually gives better quality (pngquant aims for minimum square error and guarantees local optimum, while pngnq has neural net algorithm that sometimes works well, sometimes misses details or generates useless palette entries)
* pngquant can automatically choose number of colors required for desired quality and leave 24-bit image if it requires too many colors.
* pngquant's algorithm is available as embeddable libimagequant