Pnmgamma(1) General Commands Manual (NAME) pnmgamma - Netpbm (SYNOPSIS) pnmgamma { -bt709tolinear | -lineartobt709 | -bt709tosrgb | -srgbtobt709 } [-gamma=float] [-rgamma=float] [-ggamma=float] [-bgamma=float] [pnmfile] pnmgamma [ -bt709ramp | -srgbramp ] [-ungamma] [{gamma | redgamma greengamma bluegamma} [pnmfile]] (DESCRIPTION) Netpbm(1). pnmgamma -PNM . PPM . (Luminance) ITU-R BT.709 . BT.709 (Radiance) . PPM PGM : ( << >> linear intensity ). SRGB (IEC) . SRGB BT.709 . SRGB <> . . pnmgamma -PPM . PPM pnmgamma -bt709tolinear PPM . pnmgamma -linearto709 PPM . PGM . pnmgamma PBM PGM . -PPM PPM pnmgamma . PPM pnmgamma ( ) . (PARAMETERS) . . . -bt709ramp ( -cieramp) -srgbramp ( ) . . ( ) . -gamma -rgamma -ggamma -bgamma . (OPTIONS) libnetpbm ( -quiet ) pnmgamma : -bt709tolinear BT.709 . PPM PGM . Netpbm 10.32 ( ) . -lineartobt709 BT.709. PPM PGM . BT.709 ( PPM PGM ) ( -gamma ). Netpbm 10.32 ( ) . -bt709tosrgb BT.709 SRGB. PPM PGM SRGB . SRGB ( -gamma ). Netpbm 10.32 ( ) . -srgbtobt709 SRGB BT.709. PPM PGM SRGB. Netpbm 10.32 ( ) . -bt709ramp -lineartobt709 . Netpbm 10.32 ( ) . -cieramp . -cieramp -bt709ramp . CIE ( ) ( ) . -srgbramp SRGB. ( ) SRGB . . pnmgamma . . Netpbm -lineartobt709 -bt709tosrgb PNG TIFF pngtopam pnmtotiff . -srgbramp Netpbm pnmgamma . -ungamma ( ). -bt709ramp ( -cieramp) -srgbramp . -gamma=float . . . . . ( ) . . -bt709tosrgb -srgbtobt709 . -gamma (<>) (<>) . (-rgamma ) -gamma . -bt709ramp ( -cieramp) -srgbramp <#parameters> . Netpbm 10.32 ( ) . -rgamma=float -ggamma=float -bgamma=float -gamma . -gamma ( -gamma ). -bt709ramp ( -cieramp) -srgbramp <#parameters> . Netpbm 10.32 ( ) . -maxval=maxval (maxval) . maxval . maxval . -ungamma -bt709ramp maxval . maxval maxval . Netpbm 10.32 ( ) . maxval maxval pamdepth . (WHAT IS GAMMA?) (Charles Poynton) http://www.poynton.com/GammaFAQ.html(1) http://www.poynton.com/ColorFAQ.html(1) . : . . . . . . (Luminance) . . . . . CRT . CRT ! ( ) . (SEE ALSO) pnm(1) (AUTHORS) 1991 Bill Davidson Jef Poskanzer . (DOCUMENT SOURCE) Netpbm makeman HTML . : http://netpbm.sourceforge.net/doc/pnmgamma.html netpbm Pnmgamma(1)