pnmfilt

Pipe image through PNM utility

out = pnmfilt(cmd) runs the external program given by the string cmd and the output (assumed to be PNM format) is returned as out.

out = pnmfilt(cmd, im) pipes the image im through the external program given by the string cmd and the output is returned as out. The external program must accept and return images in PNM format.

Examples

im = pnmfilt('ppmforge -cloud');
im = pnmfilt('pnmrotate 30', lena);

Notes

• Provides access to a large number of Unix command line utilities such as ImageMagick and netpbm.
• The input image is passed as stdin, the output image is assumed to come from stdout.
• MATLAB doesn't support i/o to pipes so the image is written to a temporary file, the command run to another temporary file, and that is read into MATLAB.

See also

pgmfilt, iread

Machine Vision Toolbox for MATLAB © 1990-2014 Peter Corke.