NAME ppmspread – displace a portable pixmap’s pixels by a random amount SYNOPSIS ppmspread amount [ppmfile] DESCRIPTION Reads a portable pixmap as input. Moves every pixel around a bit relative to its original position. amount determines by how many pixels a pixel is to be moved around at most. Pictures processed with this filter will…
NAME ppmshift – shift lines of a portable pixmap left or right by a random amount SYNOPSIS ppmshift shift [ppmfile] DESCRIPTION Reads a portable pixmap as input. Shifts every row of image data to the left or right by a certain amount. The ‘shift’ parameter determines by how many pixels a row is to be…
NAME ppmshadow – add simulated shadows to a portable pixmap image SYNOPSIS ppmshadow [-b blur_size] [-k] [-t] [-x xoffset] [-y yoffset] [-u] [pnmfile] DESCRIPTION ppmshadow adds a simulated shadow to an image, giving the appearance that the contents of the image float above the page, casting a diffuse shadow on the background. Shadows can either…
NAME ppmrough – create PPM image of two colors with a ragged border between them SYNOPSIS ppmrough [-left pixels] [-right pixels] [-top pixels] [-bottom pixels] [-width pixels] [-height pixels] [-bg rgb:##/##/##] [-fg rgb:##/##/##] [-var pixels] [-randomseed seed] [-verbose] All options can be abbreviated to their shortest unique prefix. You may use two hyphens instead of…
NAME ppmrelief – run a Laplacian relief filter on a portable pixmap SYNOPSIS ppmrelief [ppmfile] DESCRIPTION Reads a portable pixmap as input. Does a Laplacian relief filter, and writes a portable pixmap as output. The Laplacian relief filter is described in "Beyond Photography" by Holzmann, equation 3.19. It’s a sort of edge-detection. SEE ALSO pgmbentley(1),…
NAME ppmrainbow – Generate a rainbow SYNOPSIS ppmrainbow [-width=number] [-height=number] [-tmpdir=directory] [-verbose] color … 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 equals signs between an option name and its value. DESCRIPTION ppmrainbow generates…
NAME ppmqvga – 8 plane quantization SYNOPSIS ppmqvga [ options ] [ input file ] DESCRIPTION ppmqvga quantizes PPM files to 8 planes, with optional Floyd-Steinberg dithering. Input is a PPM file from the file named, or standard input of no file is provided. Options -d dither. Apply Floyd-Steinberg dithering to the data -q quiet….
NAME ppmquantall – run ppmquant on a bunch of files all at once, so they share a common colormap SYNOPSIS ppmquantall [-ext extension] ncolors ppmfile … DESCRIPTION Takes a bunch of portable pixmap as input. Chooses ncolors colors to best represent all of the images, maps the existing colors to the new ones, and overwrites…
NAME ppmquant – quantize the colors in a portable pixmap down to a specified number SYNOPSIS ppmquant [-floyd|-fs] ncolors [ppmfile] ppmquant [-floyd|-fs] [-nofloyd|-nofs] -mapfile mapfile [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…
NAME ppmpat – make a pretty pixmap SYNOPSIS ppmpat -gingham2|-g2|-gingham3| -g3|-madras|-tartan| -poles|-squig|-camo| -anticamo width height DESCRIPTION Produces a portable pixmap of the specified width and height, with a pattern in it. This program is mainly to demonstrate use of the ppmdraw routines, a simple but powerful drawing library. See the ppmdraw.h include file for more…
NAME ppmntsc – make a portable pixmap look like taken from an American TV SYNOPSIS ppmntsc [ –pal ] [ –legalonly ] [ –illegalonly ] [ –correctedonly ] [ –verbose ] [ –debug ] [ infile ] Minimum unique abbreviations of options are acceptable. DESCRIPTION This program makes colors legal in the NTSC (or PAL)…
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 ppmmix – blend together two portable pixmaps SYNOPSIS ppmmix fadefactor ppmfile1 ppmfile2 DESCRIPTION Reads two portable pixmaps as input. Mixes them together using the specified fade factor. The fade factor may be in the range from 0.0 (only ppmfile1’s image data) to 1.0 (only ppmfile2’s image data). Anything in between gains a smooth blend…
NAME ppmmake – create a pixmap of a specified size and color SYNOPSIS ppmmake color width height DESCRIPTION Produces a portable pixmap of the specified color, width, and height. The color can be specified in five ways: o A name, assuming that a pointer to an X11-style color names file was compiled in. o An…
NAME ppmlabel – add text to a portable pixmap SYNOPSIS ppmlabel [-angle angle] [-background transparent | colour] [-colour colour] [-file filename] [-size textsize] [-text ‘text string’] [-x column] [-y row] … [ppmfile] DESCRIPTION ppmlabel uses the text drawing facilities of ppmdraw to add text to a portable pixmap. The location, size, baseline angle, colour of…
NAME ppmhist – print a histogram of a portable pixmap SYNOPSIS ppmhist [-hexcolor] [-noheader] [-map] [-nomap] [-sort={frequency,rgb}] [ppmfile] DESCRIPTION Reads a PPM image as input. Generates a histogram of the colors in the image, i.e. a list of all the colors and how many pixels of each color are in the image. OPTIONS -sort={frequency,rgb} The…
NAME ppmglobe – generate strips to glue onto a sphere SYNOPSIS ppmglobe [-background=colorname] [-closeok] stripcount [filename] 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. DESCRIPTION…
NAME ppmforge – fractal forgeries of clouds, planets, and starry skies SYNOPSIS ppmforge [-clouds] [-night] [-dimension dimen] [-hour hour] [-inclination|-tilt angle] [-mesh size] [-power factor] [-glaciers level] [-ice level] [-saturation sat] [-seed seed] [-stars fraction] [-xsize|-width width] [-ysize|-height height] DESCRIPTION ppmforge generates three kinds of “random fractal forgeries,” the term coined by Richard F. Voss…
NAME ppmflash – brighten a picture up to complete white-out SYNOPSIS ppmflash flashfactor [ppmfile] DESCRIPTION Reads a portable pixmap as input. Increases its brightness by the specified flashfactor up to a total white-out image. The flashfactor may be in the range from 0.0 (original picture’s brightness) to 1.0 (full white-out, The Second After). As pnmgamma…
NAME ppmfade – generate a transition between two image files using special effects. SYNOPSIS ppmfade [ -f first.ppm ] [ -l last.ppm ] [ -mix|-spread|-shift|-relief|-oil|-edge|-bentley|-block ] [ -base name ] DESCRIPTION This program generates a transition between either two input images or between one input image and black. You can use the 30 intermediate images…