Image feature extraction and comparison

[mappedbyte]

How to use image eigenvalues and extraction, I need some sample code, I didn't find the detector of OpenCV

[saudet]

If you have some sample code in C++, we can start from there.

[mappedbyte]

If you have some sample code in C++, we can start from there.

No, I don't have C + + code. I need javacv for image feature extraction and comparison

[mappedbyte]

For mat in javacv, I can't find the get () method. How to use double [] grayarr = mat.get(i, j) in opencv ; This method

[saudet]

We can use the Java API of OpenCV with JavaCV as well: http://bytedeco.org/javacpp-presets/opencv/apidocs/org/opencv/core/Mat.html#get-int-int-