can any one explain to me how they use SURF and MSER in this page of matlab Extract interest point descriptors

i need to explain to me how they use MSRE and SURF

in that line "Find features using MSER with SURF feature descriptor."

https://www.mathworks.com/help/vision/ref/extractfeatures.html#namevaluepairarguments

Answer 1

[Kavya Vuriti]

Hi,

MSER is based on taking regions that stay same for wide range of thresholds. It basically extracts co-variant regions from an image. In the particular example of Find features using MSER with SURF feature descriptor.

%Extracts the regions that stay same in the image. 
regions = detectMSERFeatures(I); 
%Extracts the surf features from the regions that are obtained from the detectMSERFeatures function. 
[features, valid_points] = extractFeatures(I,regions,'Upright',true); 

MSER gives the regions that are distributed over the entire image. Describing the SURF features over these regions will aid in the feature tracking.

[hajer jon]

Thank you for answer

if i want to detect and track people using MSER to detect then SURF to track?? or using combine SURF and MSER then track using SURF??

[Kavya Vuriti]

Using MSER, get the regions of the people in the frame and use SURF over these regions for feature description and use them for tracking.

[hajer jon]

the same code in above ? or deffrent if so could you please write it

thank you