digitized 30 frames to .rgb on sgi:
vlan_grab -s 0:9:51:29 -e 0:9:52:28 -c 5 -v -f kaporclass

converted to ppm in csh:
foreach i (*.rgb)
toppm $i $i:r.ppm                              # set test = file.end
end                                            # echo $test:e
                                               # echo $test:r
converted to greyscale in matlab:
for  i=0:29                                                             
eval(sprintf('[trash, A, trash2]=loadpnm(''kaporclass_000%02d.ppm'');',i,i))
eval(sprintf('save kaporclass_000%02d A',i))
end

convert to 220 by 320 as in entrance77massave