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# pgm-interlace
Vertically interlace *n* PGM frames, each one *height/n* pixels in width into
one square image with a width the same as the height.
By example, it would take two 2x4 images:
Image A:
0 1
1 A B
2 C D
3 E F
4 G H
Image B:
0 1
1 I J
2 K L
3 M N
4 O P
combining them into one single 4x4 image from the command `pgm-interlace imageA imageB`
0 1 2 3
0 A I B J
1 C K D L
2 E M F N
3 G O H P
The order in which the frames are specified on the command line is critical for
the reconstruction of the image. pgm-interlace has no way of telling in which
order a handful of pgm frames should be interlaced unless you tell it how to
stitch them together.
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