The following images:        lenna.pgm        barbara.pgm        goldhill.pgmwere retrieved from the Web site of the Image Communications Lab of UCLA(http://www.icsl.ucla.edu/~ipl).These images have been used extensively as "standard" images for testingwavelet coders.  They are all grayscale with a resolution of 512x512.  Theseimages were originally in a raw binary format, but have been converted topgm format here (involves only the addition of a header).The notes on the origin of the images (as noted at the UCLA site) are as follows:-------------------------------------------------------------------------------The Lena image above is the one from the RPI site; the Barbara image from is the lab of Prof. Gersho at UC Santa Barbara. The Goldhill image is from R. Joshi of Washington.A word of caution: Unfortunately, the "standard" images aren't standard, and there are several versions of all of the above images that have been used to report coding results. -------------------------------------------------------------------------------Additionally, we include the file lenna.mask.pgm, a transparency mask foruse with shape-adaptive coding. This mask, for the lenna.pgm image, segmentsLenna from the background.