7.5mm toshiba

dots -w -r 10 -c 16 -o deletemedots netcam7.5higain
Input image size: (480 (y), 640 (x)). Frames: 1. Bytes/pixel : 1.
now run: swarp -w -x  336.00 -y  274.69 -a 9.826702635e-01 -b 2.333436093e-07 -c
 -1.157903449e-13 -o outfile infile
assigned file to ofile deletemedots/data

filt2d g5.1 on dot pattern, then running dots gives...

dots -w -r 10 -c 16 -o deletemedots_for_und2 netcam7.5higain_und2
Input image size: (240 (y), 320 (x)). Frames: 1. Bytes/pixel : 1.
now run: swarp -w -x  167.56 -y  137.62 -a 9.825952577e-01 -b 9.390458504e-07 -c
 -1.930069583e-12 -o outfile infile
assigned file to ofile deletemedots_for_und2/data

seems like x/2, y/2, a, 4*b, 16*c
which is approx.
swarp -w -x  168.0 -y  137.345 -a 9.826702635e-01 -b 9.3337e-07
 -c -1.8526e-12 -o outfile infile