The images are:
Bird256x256x8 (natural)
Bridge256x256x8 (natural)
Camera256x256x8 (natural)
Circles256x256x8 (natural)
Crosses256x256x8 (natural)
Goldhill256x256x8 (natural)
Horiz256x256x8 (natural)
Lena256x256x8 (natural)
Montage256x256x8 (natural)
Slope256x256x8 (natural)
Squares256x256x8 (natural)
Text256x256x8 (natural)
Other images from the Waterloo Repertoire are found in GreySet2 and ColorSet .