PIXSHRINK(1)

pixshrink - shrink a color pix file

pixshrink [-s squareinsize] [-w in_width] [-n in_height] [-f shrink_factor] [-u] [infile.pix] > outfile.pix

pixshrink will take a color pix(5) format file of given dimensions and produce a smaller scaled version. The -w and -n flags specify the input file width and number of scan lines in pixels. They can both be set to the same value via -s. Defaults of 512 are assumed for unspecified dimensions. The integer scaling factor (shrink_factor) is set with the -f flag. By default, the factor is 2. Thus, pixshrink forms the logical opposite of the pixinterp2x (1) program.

The program reads the entire image into memory, and then scales the image down to 1/shrink_factor the original size in both dimensions.

By default, pixshrink uses boxcar averaging to produce the output pixels from the input. The -u option causes pixshrink to use image undersampling instead.

brlcad(1), pixcrop(1), pixrect(1), pixinterp2x(1), pixscale(1), pix(5)

If the dimensions of the input image are not evenly divisible by the shrink factor, incorrect and bizarre output is generated.

BRL-CAD Team

This software is Copyright (c) 1989-2021 by the United States Government as represented by U.S. Army Research Laboratory.

Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org