quantize(5) File Formats Manual quantize(5) (NAME) quantize - ImageMagick (SYNOPSIS) #include (DESCRIPTION) ImageMagick . . n RGB . RGB pi : (ri, gi, bi). ( ) cmax . RGB (0,0,0) (cmax,cmax,cmax) . ImageMagick cmax = 255 . . : RGB . (0,0,0) (cmax,cmax,cmax) . . . : (Classification) (Reduction) (Assignment). . . . . << >> . . cmax . k- cmax = 2k-1 k . : ki=1 8k k = 8, cmax = 255 ,, . ImageMagick: () () ( log4(colormap size)+2). . . . . RGB . : n1: RGB n2: n2 = 0 . Sr, Sg, Sb: . n2 . E: RGB . . n2 > 0 . E . Ep : Ep = 0 while number of nodes with (n2 > 0) > required maximum number of colors prune all nodes such that E <= Ep Set Ep to minimum E in remaining nodes . . n2 Sr, Sg, Sb . . n2 RGB . n2 > 0 . n2 = 0 . n1 . n1 - n2 . . : () ( RGB) () . . n2 > 0 Sr Sg Sb n2 . . . . . YUV YIQ RGB . . . cmax . . (MEASURING COLOR REDUCTION ERROR) . ( ) ( ) . . ( ) ImageMagick RGB . ImageMagick . . . . -verbose -colors : mean error per pixel: . normalized mean square error: . . normalized maximum square error: . . (SEE ALSO) display(1), animate(1), mogrify(1), import(1), miff(5) (COPYRIGHT) (C) 2002 ImageMagick Studio . (<>) ImageMagick / ImageMagick ImageMagick : ImageMagick . << >> . ImageMagick Studio ImageMagick ImageMagick . ImageMagick Studio ImageMagick Studio ImageMagick . (ACKNOWLEDGEMENTS) (Paul Raveling) (USC Information Sciences Institute) . . (AUTHORS) (John Cristy) ImageMagick (ImageMagick Studio) ImageMagick $Date$ quantize(5)