Pnmhisteq User Manual(0) Pnmhisteq User Manual(0) (NAME) pnmhisteq - PNM (SYNOPSIS) pnmhisteq [-gray] [-noblack] [-nowhite] [-rmap pgmfile] [-wmap pgmfile] [-verbose] [pnmfile] (DESCRIPTION) Netpbm(1) . pnmhisteq PGM PPM << >> (histogram equalization) .[1] pnmhisteq (luminosity) . . . . . : B (bucket) 0 ( ) B-1 . N[i] i . T ( N[i] i) . W . pnmhisteq j : j --- \ > (N[i] / T) * W / --- i=0 (grayscale) . . pnmhisteq . A B 0.2 A 0.4 B 0.4 . pnmhisteq . ( ) . -wmap pnmhisteq PGM . -rmap pnmhisteq . pnmhisteq -wmap pamcat . pnmhisteq -rmap . pnmhistmap . ppmtopgm . . . -width pnmhistmap . (OPTIONS) libnetpbm ( -quiet (Common Options) ) pnmhisteq : . -gray ( ) . ( ) . . graymap . -noblack . . . . . Netpbm 10.70 ( ) . -nowhite -noblack . -noblack -nowhite . Netpbm 10.70 ( ) . -rmap mapfile PGM mapfile . PGM pnmhisteq -wmap maxval ( ) . ( = ) . -wmap mapfile PGM mapfile . pnmhisteq -rmap . -verbose (Standard Error) . (LIMITATIONS) (continuous-tone) . (halftone) . pnmnorm pnmgamma . -rmap maxval . -wmap pnmhisteq . maxval pamdepth . PBM ( ) pnmhisteq . (SEE ALSO) pnmnorm(1), pamcat(1), pamdepth(1), pnmgamma(1), pnm(1), [1] Russ, John C. The Image Processing Handbook. Boca Raton: CRC Press, 1992. Pages 105-110. (DOCUMENT SOURCE) 'makeman' Netpbm HTML . : http://netpbm.sourceforge.net/doc/pnmhisteq.html netpbm documentation 22 March 2015 Pnmhisteq User Manual(0)