ppmtv
Apply TV scan line effect to images
TLDR
Apply TV scan line effect
$ ppmtv [input.ppm] > [output.ppm]
Read from stdin in a pipeline$ pnmtopnm [input.png] | ppmtv > [output.ppm]
SYNOPSIS
ppmtv [ppmfile]
DESCRIPTION
ppmtv applies a CRT television scan line effect to PPM images, simulating the appearance of an old interlaced TV display by darkening alternating rows. Reads from standard input if no file is specified. Part of the Netpbm toolkit.
CAVEATS
Input must be in PPM format. Use conversion tools (e.g., jpegtopnm, pngtopam) to convert other formats first.
SEE ALSO
ppmquant(1), pamdeinterlace(1), netpbm(1)
