Section 1: user commands and tools
NAME pgpdump – A PGP packet visualizer SYNOPSIS pgpdump [options] [PGPfile] DESCRIPTION The pgpdump is a PGP packet visualizer which displays the packet format of OpenPGP (RFC 4880) and PGP version 2 (RFC 1991). The options are as follows: -a Accepts ASCII input only. -g Selects alternate dump format. -h Displays a help message. -i…
NAME pgmtoy4m – Convert mpeg2dec pgm and pgmpipe output to YUV4MPEG2 SYNOPSIS pgmtoy4m [options] DESCRIPTION pgmtoy4m repacks the PGM output from mpeg2dec into YUV4MPEG2 4:2:0p. No actual changes to the data are made. The data is unpacked from the quasi-PGM format and placed in YUV4MPEG2 format with the specified sample aspect, frame rate and field…
NAME pgmtoppm – colorize a portable graymap into a portable pixmap SYNOPSIS pgmtoppm colorspec [pgmfile] pgmtoppm colorspec1–colorspec2 [pgmfile] pgmtoppm -map mapfile [pgmfile] DESCRIPTION Reads a PGM as input. Produces a PPM file as output with a specific color assigned to each gray value in the input. If you specify one color argument, black in the…
NAME pgmtopgm – copy PGM image SYNOPSIS pgmtopgm DESCRIPTION This program is part of Netpbm(1) pgmtopgm simply copies a PGM image from Standard Input to Standard Output. This may seem an unnecessary duplication of cat, but remember that a PGM program can read a PBM image as if it were PGM. So pgmtopgm can read…
NAME pgmtopbm – convert a portable graymap into a portable bitmap SYNOPSIS pgmtopbm [-floyd|-fs|-threshold |-hilbert |-dither8|-d8|-cluster3 |-c3|-cluster4|-c4 |-cluster8|-c8] [-value val] [-clump size] [pgmfile] DESCRIPTION Reads a portable graymap as input. Produces a portable bitmap as output. Note that there is no pbmtopgm converter. Any program that uses the Netpbm libraries to read PGM files, including…
NAME pgmtolispm – convert a portable graymap into Lisp Machine format SYNOPSIS pgmtolispm [pgmfile] DESCRIPTION Reads a portable graymap as input. Produces a Lisp Machine bitmap as output. This is the file format read by the tv:read-bit-array-file function on TI Explorer and Symbolics lisp machines. Given a pgm (instead of a pbm) a multi-plane image…
NAME pgmtofs – convert portable graymap to Usenix FaceSaver(tm) format SYNOPSIS pgmtofs [pgmfile] DESCRIPTION Reads a portable graymap as input. Produces Usenix FaceSaver(tm) format as output. FaceSaver is a registered trademark of Metron Computerware Ltd. of Oakland, CA. SEE ALSO fstopgm(1), pgm(5) AUTHOR Copyright (C) 1991 by Jef Poskanzer. Index
NAME pgmtexture – calculate textural features on a portable graymap SYNOPSIS pgmtexture [-d d] [pgmfile] DESCRIPTION Reads a portable graymap as input. Calculates textural features based on spatial dependence matrices at 0, 45, 90, and 135 degrees for a distance d (default = 1). Textural features include: (1) Angular Second Moment, (2) Contrast, (3) Correlation,…
NAME pgmslice – extract one line of pixel values out of a portable graymap SYNOPSIS pgmslice -row|-col line [pgmfile] DESCRIPTION Extracts one line of pixel values out of a portable graymap and outputs it in a two column ascii format, with the first value being the pixel’s position in the line and the second value…
NAME pgmramp – generate a grayscale ramp SYNOPSIS pgmramp -lr|-tb | -rectangle|-ellipse width height DESCRIPTION Generates a graymap of the specified size containing a black-to-white ramp. These ramps are useful for multiplying with other images, using the pnmarith tool. OPTIONS -lr A left to right ramp. -tb A top to bottom ramp. -rectangle A rectangular…
NAME pamoil – turn a PAM image into an oil painting SYNOPSIS pamoil [-n N] [pamfile] DESCRIPTION Reads a Netpbm image as input. Does an "oil transfer", and writes the same type of Netpbm image as output. The oil transfer is described in "Beyond Photography" by Holzmann, chapter 4, photo 7. It’s a sort of…
NAME pnmnorm – normalize the contrast in a Netbpm image SYNOPSIS pnmnorm [-bpercent N | -bvalue N] [-wpercent N | -wvalue N] [-keephues] [-brightmax] [ppmfile] All options can be abbreviated to their shortest unique prefix. You may use two hyphens instead of one to designate an option. You may use either white space or an…
NAME pgmnoise – create a graymap made up of white noise SYNOPSIS pgmnoise width height DESCRIPTION Creates a portable graymap that is made up of random pixels with gray values in the range of 0 to PGM_MAXMAXVAL (depends on the compilation, either 255 or 65535). The graymap has a size of width * height pixels….
NAME pgmmorphconv – perform morphological convolutions: dilation, erosion SYNOPSIS pgmmorphconv [ -erode | -dilate | -open | -close ] templatefile [pgmfile] Minimum unique abbreviation of option is acceptable. You may use double hyphens instead of single hyphen to denote options. You may use white space in place of the equals sign to separate an option…
NAME pgmminkowski – compute Minkowski integral SYNOPSIS pgmminkowski pgmfile DESCRIPTION This program is part of Netpbm(1) pgmminkowski computes the 3 Minkowski integrals of a PGM image. The Minkowski integrals mathematically characterize the shapes in the image and hence are the basis of "morphological image analysis." Hadwiger’s theorem has it that these integrals are the only…
NAME pgmmedian – apply a median filter to a PGM file SYNOPSIS pgmmedian [-width=n] [-height=n] [-type=median_type] [-cutoff=int] [pnmfile] Minimum unique abbreviation of option is acceptable. You may use double hyphens instead of single hyphen to denote options. You may use white space in place of the equals sign to separate an option name from its…
NAME pgmmake – create a PGM image of a specified gray level and dimensions SYNOPSIS pgmmake [-maxval=maxval] graylevel width height All options can be abbreviated to their shortest unique prefix. You may use two hyphens instead of one to designate an option. You may use either white space or an equals sign between an option…
NAME pgmkernel – generate a convolution kernel SYNOPSIS pgmkernel [ -weight w ] width [ height ] DESCRIPTION Generates a portable graymap array of size width x height (or width x width if height is not specified) to be used as a convolution file by pnmconvol. The data in the convolution array K are computed…
NAME pgmhist – print a histogram of the values in a portable graymap SYNOPSIS pgmhist [pgmfile] DESCRIPTION Reads a portable graymap as input. Prints a histogram of the gray values. SEE ALSO pgmnorm(1), pgm(5), ppmhist(1) AUTHOR Copyright (C) 1989 by Jef Poskanzer. Index
NAME pgmenhance – edge-enhance a portable graymap SYNOPSIS pgmenhance [-N] [pgmfile] DESCRIPTION Reads a portable graymap as input. Enhances the edges, and writes a portable graymap as output. The edge enhancing technique is taken from Philip R. Thompson’s "xim" program, which in turn took it from section 6 of "Digital Halftones by Dot Diffusion", D….