HISTEQ default not consistent with syntax?

1 vue (au cours des 30 derniers jours)
Jurgen
Jurgen le 15 Nov 2012
If I have an 8-bit image IM (e.g. cameraman.tif), why does histeq(IM) produce a different result than histeq(IM,ones(1,256))??
Shouldn't they be identical? The description says hgram defaults to ones(1,n)*prod(size(A))/n. Since cameraman is 256x256 and n=2^8, shouldn't it scale normally?

Connectez-vous pour répondre à cette question.

Réponse acceptée

Matt Fig
Matt Fig le 15 Nov 2012
IM = imread('cameraman.tif');
I = histeq(IM);
I2 = histeq(IM,ones(1,64)*(numel(IM)/64));
isequal(I,I2)
ans =
1
  1 commentaire
Jurgen
Jurgen le 15 Nov 2012
I see it uses n=64 then, I was testing with n=256. Because of the description I was under the impression that n=length(HGRAM). Thanks for clearing that up.

Connectez-vous pour commenter.

Plus de réponses (0)

Catégories

En savoir plus sur Image Filtering and Enhancement dans Help Center et File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by