There is no single way to evaluate the quality of an image. The image may have good contrast, but poor color balance. It may be in sharp focus but too dark. Some portion of the image may look great; another may have motion blur. Hence, there can be no single measure of image quality.

ISET includes a variety of tools to assess different components of image quality. For example, ISET includes software for calculating the visibility of spatial blur, noise, and color accuracy.

In addition to these tools, ISET includes standard test images to evaluate color  (e.g., Gretag ColorChecker) and pattern (Mackay Chart) and spatial targets designed by ImagEval Consulting.