How to plot a 2D histogram of pixel pairs ?
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
I have a 'M by 2' matrix consisting of pixel pairs in an image. I want to find which pixel pairs occur more frequently. For this I need to plot a 2D histogram. Any suggestions ?
0 Kommentare
Antworten (2)
Azzi Abdelmalek
am 30 Mär. 2014
If you can find the frequency of each pair, then you can find the most frequent one.
A=[1 2;3 4;1 2;5 6;1 2;5 6]
[ii,jj,kk]=unique(A,'rows')
f=histc(kk,1:numel(jj))
[a,idx]=max(f)
out=[ii(idx,:) a]
0 Kommentare
Image Analyst
am 30 Mär. 2014
There is a special function made to exactly that. It's called graycomatrix() and is in the Image Processing Toolbox. It calculates what is called the Gray Level Cooccurrence Matrix. The GLCM is what you called the 2D histogram. My demo script is attached below in blue text. I show the GLCM as a 2D image, like a heat map.
0 Kommentare
Siehe auch
Kategorien
Mehr zu Histograms finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!