I want Matlab code of SIFT algorithm . I use it for "Human Activities Recognition" in Video.

I want Matlab code of SIFT algorithm . I use it for "Human Activities Recognition" in Video.

Answer 1

[Gayathri]

Hi @Walaa Jasim,

From MATLAB R2021b release, "detectSIFTFeatures" has been introduced to detect scale invariant feature transform (SIFT) features. This function detects SIFT features in the 2-D grayscale or binary input image I and returns a "SIFTPoints" object.

Please refer to the below code to know more about the usage of "detectSIFTFeatures" function.

I = imread('cameraman.tif');
points = detectSIFTFeatures(I);
% Display the results
imshow(I);
hold on;
plot(points.selectStrongest(10))

Please refer to the below documentation link to know more about the function.

https://www.mathworks.com/help/vision/ref/detectsiftfeatures.html

Hope this helps!

[Walter Roberson]

@Walaa Jasim asked for the source code of SIFT -- the actual implementation.

The implementation code is implemented in C++ and the code does not appear to be published.