• filter- NEGATE, GRAYSCALE, BRIGHTNESS, CONTRAST, COLORIZE, EDGEDETECT, EMBOSS, GAUSSIAN_BLUR, SELECTIVE_BLUR, MEAN_REMOVAL, SMOOTH, PIXELATE 

• Massive improvement of the overall quality of the processes image and smaller overall file sizes

• Did I mention filters!!! :D

Also it's been well tested by many people and sites.