PhotoDefiner Editor is a simple and easy to use image compression Mac OS X utility that will allow you to quickly compress your photos and export them to the CPD, JPD, GPD new formats.
Saving 25/30 % (For 24 bits true color images).
The CPD (Compression PhotoDefiner) image format, as an alternative to the .PNG format for create a smaller compressed images.
The GPD (Graphic PhotoDefiner) image format, as an alternative to the .PNG and the .GIF formats.
The JPD (Joint PhotoDefiner) is a compressed raster image format used by PhotoDefiner, as an alternative to the .JPG format. It uses lossy compression that quantizes the color space before DCT.