Jpegtopnm User Manual(0) Jpegtopnm User Manual(0) (NAME) jpegtopnm - JPEG/JFIF PPM PGM (SYNOPSIS) jpegtopnm [-dct {int|fast|float}] [-nosmooth] [-maxmemory N] [{-adobe|-notadobe}] [-comments] [-dumpexif] [-exif=filespec] [-multiple] [-repair] [-verbose] [-tracelevel N] [-traceexif] [filename] . . . (DESCRIPTION) Netpbm(1) . jpegtopnm JFIF PPM PGM . jpegtopnm JFIF PGM PPM . . -multiple jpegtopnm JFIF JFIF PPM PGM . . filename filename (Standard Input) . (Standard Output) . JFIF (grayscale) jpegtopnm PGM PPM . Netpbm 10.11 ( ) jpegtopnm . 10.11 10.22 Netpbm -multiple . Netpbm 10.23 ( ) Netpbm 10.11 -multiple 10.12 . JFIF JFIF . JFIF JFIF JFIF . jpegtopnm JPEG JPEG ( Independent JPEG Group IJG) . http://www.ijg.org . "JFIF" "JPEG" . JPEG . JPEG JFIF . TIFF JPEG . EXIF JFIF ( JFIF EXIF APP1 ). jpegtopnm EXIF . JFIF (sample) . . IJG JPEG : . jpegtopnm (link) . jpegtopnm . jpegtopnm JFIF . pamdepth . JFIF CMYK YCCK . . jpegtopnm . JFIF jpegtopnm(1) . (OPTIONS) libnetpbm ( -quiet (Common Options) ) jpegtopnm : . -dct int DCT (). -dct fast DCT ( ). -dct float DCT (floating-point). . . . -nosmooth (upsampling) . -maxmemory N jpegtopnm . "M" . -maxmemory 4m . jpegtopnm . -adobe -notadobe CMYK ( YCCK) JFIF . . . Adobe Photoshop JFIF ( JFIF Encapsulated Postscript ). jpegtopnm CMYK YCCK . jpegtopnm . : CMYK YCCK . . JFIF CMYK YCCK . . -dumpexif Exif (Standard Error). jhead ( Netpbm ). Netpbm 9.19 ( ) . -exif=filespec EXIF filespec. filespec=- . EXIF jpegtopnm ( ) . jpegtopnm EXIF ( ) . pnmtojpeg EXIF JFIF . EXIF jpegtopnm . EXIF APP1 JFIF . JFIF . Netpbm 9.19 ( ) . -multiple JFIF . <#description> . Netpbm 10.23 ( ) . -repair JFIF PNM . jpegtopnm . -repair . jpegtopnm . -repair JFIF (truncated). -repair -repair . JFIF jpegtopnm (pad) . Netpbm 10.38.0 ( ) . jpegtopnm . -comments () . -verbose . -tracelevel n (trace) JPEG . n . -verbose . -traceexif EXIF. Netpbm 11.02 ( ) . (EXAMPLES) JFIF foo.jpg PPM foo.ppm : jpegtopnm foo.jpg >foo.ppm (HINTS) pnmquant . PPM . ppmdither . pamscale . ppmtopgm JFIF PGM . : jpegtopnm foo.jpg | ppmtopgm | pamscale .25 >foo.pgm -dct fast / -nosmooth . -dct float -dct fast . -dct float -dct int . djpeg . djpeg JPEG JPEG jpegtopnm JPEG . JPEG . jpegtopnm cjpeg . djpeg Netpbm jpegtopnm NetPBM . NetPBM . jpegtopnm djpeg Netpbm . (ENVIRONMENT) JPEGMEM . -maxmemory . -maxmemory JPEGMEM . (SEE ALSO) ppm(1), pgm(1), pnmtojpeg(1), pnmquant(1), pamscale(1), ppmtopgm(1), ppmdither(1), pamdepth(1), djpeg cjpeg jpegtran rdjpgcom wrjpgcom jhead Wallace, Gregory K. "The JPEG Still Picture Compression Standard", Communications of the ACM, April 1991 (vol. 34, no. 4), pp. 30-44. (AUTHOR) jpegtopnm djpeg JPEG (Independent JPEG Group) . Bryan Henderson . (DOCUMENT SOURCE) 'makeman' Netpbm HTML . : http://netpbm.sourceforge.net/doc/jpegtopnm.html netpbm documentation 20 March 2023 Jpegtopnm User Manual(0)