The five test images: (a) LENA, (b) BABOON, (c) PEPPERS, (d) BARB and (e) GOLDHILL
lake.jpg
pirate.jpg
lena.jpg
woman_darkhair.jpg
peppers.jpg
cameraman.jpg
house.jpg
jetplane.jpg
mandril_gray.jpg
walkbridge.jpg
woman_blonde.jpg
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http://www.imageprocessingplace.com/root_files_V3/image_databases.htm