pnmnorm – normalize the contrast in a Netbpm image Synopsispnmnorm [-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 equals sign…
pgmnoise – create a graymap made up of white noise Synopsispgmnoise width height DescriptionCreates 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. See Alsopgm(5) AuthorCopyright…
pgmmorphconv – perform morphological convolutions: dilation, erosion Synopsispgmmorphconv [ -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 from…
pgmminkowski – compute Minkowski integral Synopsispgmminkowski pgmfile DescriptionThis 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 motion-invariant, additive and…
pgmmedian – apply a median filter to a PGM file Synopsispgmmedian [-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 value. DescriptionThis…
pgmmake – create a PGM image of a specified gray level and dimensions Synopsispgmmake [-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 and…
pgmkernel – generate a convolution kernel Synopsispgmkernel [ -weight w ] width [ height ] DescriptionGenerates 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 according to the…
pgmhist – print a histogram of the values in a portable graymap Synopsispgmhist [pgmfile] DescriptionReads a portable graymap as input. Prints a histogram of the gray values. See Alsopgmnorm(1), pgm(5), ppmhist(1) AuthorCopyright (C) 1989 by Jef Poskanzer.
pgmenhance – edge-enhance a portable graymap Synopsispgmenhance [-N] [pgmfile] DescriptionReads 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. E. Knuth, ACM…
pgmedge – edge-detect a portable graymap Synopsispgmedge [pgmfile] DescriptionReads a portable graymap as input. Outlines the edges, and writes a portable graymap as output. Piping the result through pgmtopbm -threshold and playing with the threshold value will give a bitmap of the edges. The edge detection technique used is to take the Pythagorean sum of…
pgmdeshadow – Deshadow a PGM image Synopsispgmdeshadow [pnmfile] DescriptionThis program is part of Netpbm(1) pgmdeshadow removes gray shadows from an image. This is useful for an image containing text, such as a scanned book pages, where a shadow typically appears near the book crease or near one side of the image. pgmdeshadow recognizes a gray…
pgmcrater – create cratered terrain by fractal forgery Synopsispgmcrater [-number n] [-height|-ysize s] [-width|-xsize s] [-gamma g] All options can be abbreviated to their shortest unique prefix. Descriptionpgmcrater creates a PGM image which mimics cratered terrain. The PGM image is created by simulating the impact of a given number of craters with random position…
pgmbentley – Bentleyize a portable graymap Synopsispgmbentley [pgmfile] DescriptionReads a portable graymap as input. Performs The Bentley Effect, and writes a portable graymap as output. The Bentley Effect is described in "Beyond Photography" by Holzmann, chapter 4, photo 4. It’s a vertical smearing based on brightness. See Alsopgmoil(1), ppmrelief(1), pgm(5) AuthorCopyright (C) 1990 by Wilson…
pgmabel – create cross section using Abel Integration for Deconvolution Synopsispgmabel [-help] [-axis axis] [-factor factor] [-pixsize pixsize] [-left | -right] [-verbose] [filespec] DescriptionThis program is part of Netpbm(1) pgmabel reads as input a PGM image, which it assumes to be an image of a rotational symmetric transparent object. The image must have a vertical…
pgcenter – is the PostgreSQL administration console with top-like monitoring. Synopsispgcenter [OPTION]… [DBNAME [USERNAME]] DescriptionPostgreSQL provides various statistics which includes information about tables, indexes, functions and other database objects and their usage. Moreover, statistics has information about connections, current queries and database operations (INSERT/DELETE/UPDATE). But most of this statistics are provided as permanently incremented counters….
pgbench – run a benchmark test on PostgreSQL Synopsis pgbench -i [option…] [dbname] pgbench [option…] [dbname]Descriptionpgbench is a simple program for running benchmark tests on PostgreSQL. It runs the same sequence of SQL commands over and over, possibly in multiple concurrent database sessions, and then calculates the average transaction rate (transactions per second). By default,…
gawk – pattern scanning and processing language Synopsisgawk [ POSIX or GNU style options ] -f program-file [ — ] file … gawk [ POSIX or GNU style options ] [ — ] program-text file … pgawk [ POSIX or GNU style options ] -f program-file [ — ] file … pgawk [ POSIX or…
pg_upgrade – upgrade a PostgreSQL server instance Synopsis pg_upgrade -b oldbindir -B newbindir -d olddatadir -D newdatadir [option…]Descriptionpg_upgrade (formerly called pg_migrator) allows data stored in PostgreSQL data files to be upgraded to a later PostgreSQL major version without the data dump/reload typically required for major version upgrades, e.g. from 8.4.7 to the current major release…
pg_top – display and update information about the top cpu PostgreSQL processes Synopsispg_top [ OPTIONS ] [ NUMBER ] Descriptionpg_top displays the top processes on the system and periodically updates this information. Raw cpu percentage is used to rank the processes. If number is given, then the top number processes will be displayed instead of…
pg_test_timing – measure timing overhead Synopsis pg_test_timing [option…]Descriptionpg_test_timing is a tool to measure the timing overhead on your system and confirm that the system time never moves backwards. Systems that are slow to collect timing data can give less accurate EXPLAIN ANALYZE results. Optionspg_test_timing accepts the following command-line options: -d duration, –duration=duration Specifies the test…