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1993-08-24
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489b
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19 lines
* @demohfe demonstrates the separation
* of an image into low frequency,
* high frequ. edges and hf non-edges
* by P. W. Verbeek TU-DELFT
*read trui
lmax A B 7 * maximum
lmin A C 7 * minimum
lmin B D 7 * lohull
add C B * dynamic threshold, low freq
lmax C C 7 * uphull
add C D * midian
cop B C
sub D C 127 * midian-dyth, hf edges
sub A D 127 * ori-midian, hf non-edges
don 2 * display contrast streching
gdisp D * applied on D
don * back to normal display