Image processing GLCM gray level cooccurance matrix
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In function graycomatrix,the output is always 8x8 matrix,i am not getting why its 8x8 ,can anybody help me out
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aliah aljohani
on 22 Sep 2017
hi when i use this code I = imread('circuit.tif'); glcm = graycomatrix(I,'Offset',[2 0])
i get this error Error in graycomatrix (line 167) [I, Offset, NL, GL, makeSymmetric] = ParseInputs(varargin{:});
Error in Untitled56 (line 2) GLCM = graycomatrix(I,'Offset',[2 0;0 2]); can help me and thank you
Answers (2)
Youssef Khmou
on 5 Mar 2013
hi,
We already discussed that topic , so as to avoid redundancy take a quick look at this topic you will find the answer : http://www.mathworks.com/matlabcentral/answers/64179-what-is-meant-by-glcm-mean-average
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Teja Muppirala
on 6 Mar 2013
It's just the default setting. You can change the size by using the 'NumLevels' parameter.
For example,
I = imread('pout.tif');
G = graycomatrix(I,'NumLevels', 64);
imagesc(G)
See the help:
>> help graycomatrix
...
...
...
'NumLevels' An integer specifying the number of gray levels to use
when scaling the grayscale values in I. For example,
if 'NumLevels' is 8, graycomatrix scales the values in
I so they are integers between 1 and 8. The number of
gray levels determines the size of the gray-level
co-occurrence matrix (GLCM).
'NumLevels' must be an integer. 'NumLevels' must be 2
if I is logical.
Default: 8 for numeric
2 for logical
...
...
...
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