How to extract SURF features from more than two images i.e. from a folder of facial images?

Question

KDR 2016-9-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/304237-how-to-extract-surf-features-from-more-than-two-images-i-e-from-a-folder-of-facial-images

回答： Image Analyst 2016-9-25

t8.m

I had tried the basic SURF features extraction using steps from MATLAB documentation. It works on two images, now i want to extract surf features from more images i.e. a folder of image. And how to get extracted features??

Thank you..

I want to extract features from folder of facial images using SURF descriptor.I tried with the below code but I'm getting error " _Subscripted assignment dimension mismatch.

Error in t8 (line 11) [features(:,i), valid_points(:,i)] = extractFeatures(I1, points1);"

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Gopichandh Danala 2016-9-23

Your question is not clear post your code and explain more clearly

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Answer 1

Image Analyst 2016-9-25

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/304237-how-to-extract-surf-features-from-more-than-two-images-i-e-from-a-folder-of-facial-images#answer_236016

在 MATLAB Online 中打开

Regarding your new/edited question....

Just use normal debugging techniques, like assigning the outputs to variables:

[out1, out2] = extractFeatures(I1, points1);

Now, see if out1 has the same number of rows as features, and if out2 has the same number of rows as valid_points. Really, it's just standard debugging techniques.