In order to intuitively test the effects of an image-processing algorithm on a "natural picture" a number of test images are in common use in the image-processing field. These images are generally chosen because they present a range of challenges to image reconstruction algorithms, such as the reproduction of fine detail and textures, sharp transitions and edges, and uniform regions. The most famous image is the Lenna image, from a photograph of 1972 Playboy bunny Lena Soderberg.

Gallery of common test images

The standard size of the images are usually 512x512 or 720x576.

See also

• FERET database

External links

• Computer Vison website - A large collection of links to various test images.
• Vision @ Reading - University of Reading's set of popular test images
• Denoising of natural images
• Image denoising
• Image structure preserving of lossy compression

Image processing