matching template with image

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lama riad 2012-6-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/41302-matching-template-with-image

I = imread('man.bmp'); % Load initial figure

a = imcrop(I,[50 40 150 100]);

m=imrotate(a,180);

%(Convolution is equivalent to correlation if you rotate the convolution kernel by 180.) To match the template to the image, use the fft2 and ifft2 functions.

C = real(ifft2(fft2(I).* fft2(m(a,2),256,256)));

I'm getting this error: ??? Subscript indices must either be real positive integers or logicals.

how to fix it ????

回答（2 个）

Walter Roberson 2012-6-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/41302-matching-template-with-image#answer_50891

You are trying to index your rotated image at your cropped image -- m(a,2)

I do not know what you intend that to mean.

pardon me I mean I was seeking for help in matlab from people not necessarily in mathworks only n no one is replying I donno why I'm not professional in matlab that's why I'm asking..... some people published their works in mathwork n since I ask them regarding such a point in their work they r not replying

lama riad 2012-6-16

n thank u for the reply

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Image Analyst 2012-6-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/41302-matching-template-with-image#answer_50931

"a" is a matrix. So is "m" - in fact it is the rotated version of "a". So you cannot do m(a,2). The first index must be an integer number or array or a logical value or array. You cannot have a 2D or 3D matrix (an image) for an index. I haven't replied to anyone in the past 8 days because I was way out in the wilderness. I don't work for Mathworks, by the way.