You can use the minimum unique abbreviation of the options. You can
use two hyphens instead of one. You can separate an option name from
its value with white space instead of an equals sign.
This program is part of Netpbm.
pamdeinterlace removes all the even-numbered or odd-numbered rows from
the input PNM or PAM image. Specify which with the -takeeven and
This can be useful if the image is a video capture from an interlaced
video source. In that case, each row shows the subject 1/60 second
before or after the two rows that surround it. If the subject is mov-
ing, this can detract from the quality of the image.
Because the resulting image is half the height of the input image, you
will then want to use pamstretch or pamscale to restore it to its nor-
pamdeinterlace myimage.ppm | pamstretch -yscale=2 >newimage.ppm
Another, usually better, way to deinterlace an image is with pammixin-
pammixinterlace, pam pnm
netpbm documentation 11 November 2001 Pamdeinterlace User Manual(0)