extracthogfeatures is not working in R2011a. Is it the version error or command error?
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I1 = imread('gantrycrane.png');
I2=im2double(I1);
[hog1, visualization] = extractHOGFeatures(I2,'CellSize',[32 32]);
subplot(1,2,1);
imshow(I2);
subplot(1,2,2);
plot(visualization);
??? Undefined function or method 'extractHOGFeatures' for input arguments of type 'double'.
回答（2 个）
Image Analyst
2015-3-20
0 个投票
Type ver to see if you have the Computer Vision System Toolbox - I'm not sure it existed yet in that R2011a version. Otherwise, this is a good excuse to upgrade your 4 year old version to the latest version.
3 个评论
Shreya Bareja
2015-3-20
Image Analyst
2015-3-20
I don't have that toolbox. Is extractHOGFeatures a built in function or some custom function someone gave you? Try this:
which -all extractHOGFeatures
What does it say?
Shreya Bareja
2015-3-21
Dima Lisin
2015-3-20
0 个投票
extractHOGFeatures was introduced in R2013b.
2 个评论
Shreya Bareja
2015-3-21
Image Analyst
2015-3-21
Why would it be? It's not even there in the R2011a version that you have. Like Dima said, that function was introduced in R2013b, even though you may have an earlier version of the toolbox. So you don't have it.
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2015-3-20
2015-3-21
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