[Octave-patch-tracker] [patch #8812] Added imquantize to image toolset

[Carnë Draug]

Follow-up Comment #8, patch #8812 (project octave):

Are you sure of that? That imquantize can't be replaced with lookup? I just
gave it a go, and it passes all of your tests. See what I get using lookup(),
even when the image values are scrambled:


img = [1:10; 11:20; 21:30; 31:40; 41:50; 51:60; 61:70];
idx = reshape (randperm (numel (img)), size (img));
img_s = img(idx);
quant = imquantize (img, [5 15 25 30 40 60]);
quant_s = imquantize (img_s, [5 15 25 30 40 60]);
isequal (quant_s, quant(idx))

ans =  1


I have attached my implementation (two lines if you remove input check).

(file #35615)
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Additional Item Attachment:

File name: imquantize.m                   Size:2 KB


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