From ghostview, you can view a PostScript document or image, and save or print selected pages. It can handle many different image formats, including PostScript, GIF, JPEG, TIFF, PICT,and SGI's rgb. The following table briefly describes each ImageMagick program. Trahsformations include resizing, rotation, color reduction. Unlike most image manipulation software, Imgworks and imgview allow adjustments to the color balance by interactively manipulating the red, blue and green components.
Formats are somewhat limited.
Imgworks is used to interactively manipulate images. With imgworks, you can rotate, reflect, crop and resize an image. You can also convert color to monochrome, adjust the contrast, color balance and saturation. While converting, the number of colors can be reduced or a transparent background can be interactively added. Imgview is used to view an image.