pamdeinterlace(1)pamdeinterlace(1)NAMEpamdeinterlace - remove ever other row from a PAM/PNM
image
SYNOPSISpamdeinterlace [-takeodd] [-takeeven] N [infile]
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.
DESCRIPTIONpamdeinterlace Removes all the even-numbered or odd-num
bered rows from the input PNM or PAM image. Specify which
with the -takeeven and -takeodd options.
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 sur
round it. If the subject is moving, 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 pnm
scale to restore it to its normal height:
pamdeinterlace myimage.ppm | pamstretch -yscale=2 >newim
age.ppm
OPTIONS-takeodd
Take the odd-numbered rows from the input and put
them in the output. The rows are numbered starting
at zero, so the first row in the output is the sec
ond row from the input. You cannot specify both
-takeeven and -takeodd.
-takeeven
Take the even-numbered rows from the input and put
them in the output. The rows are numbered starting
at zero, so the first row in the output is the
first row from the input. This is the default.
You cannot specify both -takeeven and -takeodd.
SEE ALSOpamstretch(1), pnmscale(1)
11 November 2001 pamdeinterlace(1)
