Pnmtopng User Manual(0) Pnmtopng User Manual(0) (NAME) pnmtopng - PNM PNG (SYNOPSIS) pnmtopng [-verbose] [-downscale] [-interlace] [-alpha=file] [-transparent=[=]color] [-background=color] [-palette=palettefile] [-gamma=value] [-hist] [-text=file] [-ztxt=file] [-rgb='wx wy rx ry gx gy bx by'] [-size='x y unit'] [-srgbintent=intent] [-modtime='[yy]yy-mm-dd hh:mm:ss'] [-nofilter] [-sub] [-up] [-avg] [-paeth] [-compression=n] [-comp_mem_level=n] [-comp_strategy={huffman_only|filtered}] [-comp_method=deflated] [-comp_window_bits=n] [-comp_buffer_size=n] [-force] [-libversion] [pnmfile] (OPTION USAGE) : [-filter n] : [-chroma wx wy rx ry gx gy bx by] [-phys x y unit] [-time [yy]yy-mm-dd hh:mm:ss] . . (whitespace) . (DESCRIPTION) Netpbm(1) . pnmtopng PNM PNG . PNG pnmtopng maxval . (grayscale) pnmtopng PNG . maxval PNG . maxval PNM maxval PNG ( ) maxval . maxval PNM maxval PNG . 2/5 = .40 3/7 = .43 . maxval maxval . PNG PGM maxval . PNG PNM maxval PNM . pamdepth maxval ( ) . : Netpbm 10.30 ( ) pnmtopng Netpbm . . . -chroma -phys -time -rgb -size -modtime . ( -phys/-size) -phys -size . pnmtopng -phys 800 800 0 input.pnm > output.png : pnmtopng -size "800 800 0" input.pnm > output.png "unrecognized option" . libnetpbm ( -quiet ) pnmtopng : -verbose pnmtopng . -downscale pnmtopng (maxval) . pnmtopng . -interlace PNG (interlaced) Adam7 . (raster) . Adam7 . . . . . -alpha=filename () . PGM ( PGM(1) ). pnmtopng PNG . PNG . pnmtopng . -transparent=color pnmtopng PNG . (color) pnm_parsecolor() . red rgb:ff/00/0d. pnmtopng . RGB . pnmtopng . "=" : -transparent =red . . pnmtopng . -background=color pnmtopng (chunk) PNG . color -transparent . -palette=palettefile PNG . pnmtopng (colormapped) PNG -- pnmtopng . pnmtopng . pnmtopng PNG -palette . PNG . PPM . PNG . PNG ( PNG). -palette . Netpbm PPM pnmremap . -palette pnmtopng . -gamma=value pnmtopng (chunk) gAMA . PNG . gAMA PNG ( ). PPM PGM -gamma=.52 . PPM PPM . . . . -hist (chunk) ( ) . -text=filename tEXt PNG . filename . tEXt . : Title PNG file Author John Doe Description how to include a text chunk PNG file "Creation Date" 2015-may-11 Software pamtopng . ( ) . . ( 'Title'). ( ) . (double quotes) . . . . . -ztxt=filename -text PNG . pnmtopng tEXt zTXt 'A' 'T' . 'Author' 'Title' . -rgb=chroma_list (chromaticities) ( ) . chroma_list : X Y CIE-1931 ( ) . cHRM PNG . chroma_list . Netpbm 10.30 ( ) . -chroma . -size="x y unit" (aspect ratio) . unit 0 1 . 1 . -size="10000 15000 1" . . unit 0 . pHYS PNG . -size pnmtopng pHYS . Netpbm 10.30 ( ) . -phys . -srgbintent=intent -Netpbm sRGB ( Netpbm ) . pnmtopng sRGB PNG PNG . intent : o perceptual o relativecolorimetric o saturation o absolutecolorimetric Netpbm 10.71 ( ) . pnmtopng sRGB . -modtime="[yy]yy-mm-dd hh:mm:ss" PNG . . Netpbm 10.30 ( ) . -time . -filter=n . Netpbm 10.22 ( ) . pnmtopng . Netpbm -nofilter -sub -up -avg -paeth . -nofilter -sub -up -avg -paeth pnmtopng . pnmtopng . -- pnmtopng . Netpbm 10.22 ( ) . -filter . . -compression=n zlib . 0 ( ) 9 ( ) . zlib . -comp_mem_level=n zlib . 1 ( ) 9 ( ) . zlib . Netpbm 10.30 ( ) . -comp_strategy={huffman_only|filtered} zlib . Zlib ..sp zlib . Netpbm 10.30 ( ) . -comp_method=deflated . . zlib Z . zlib . Netpbm 10.30 ( ) . -comp_window_bits=N zlib . . ( 32K). Zlib . zlib . Netpbm 10.30 ( ) . -comp_buffer_size=N pnmtopng zlib . (chunk) IDAT PNG . PNG IDAT . PNG ) IDAT ) . 8K ( ) . n ( ) . Netpbm 10.30 ( ) . -force pnmtopng . PNG Netpbm . PNG (paletted) . -libversion pnmtopng . -version Netpbm Netpbm . pnmtopng . pnmtopng . . (SEE ALSO) pngtopam(1), pamtopng(1), pnmremap(1), pnmgamma(1), pnm(1) PNG : http://schaik.com/png . (C) 1995-1997 Alexander Lehmann Willem van Schaik . (DOCUMENT SOURCE) Netpbm 'makeman' HTML . : http://netpbm.sourceforge.net/doc/pnmtopng.html netpbm documentation 13 March 2019 Pnmtopng User Manual(0)