how extract Features at specific regions??

Hi

i tray to extract features to detect people but it got more than one points each person i tray to use imgradientimgradient to get edge of each persons but how??

i need help

[Gx,Gy] = imgradientxy(imca);

[Gmag, Gdir] = imgradient(imca,'central');

%Gmag_normalized = Gmag / 8;

%figure

% imshow(Gmag_normalized );

%F = fft(Gmag);figure;imshow(F),title('fft');%%%%%or use imgradient

figure,imshowpair(Gmag, Gdir, 'montage');

[reg1,dd] = detectMSERFeatures(imca,'RegionAreaRange',[3 ,3]);

%[reg1,dd] = detectMSERFeatures(rgb2gray(I),'RegionAreaRange' ,[3 3]);

[features2, valid_point] = extractFeatures(rgb2gray(I),reg1);

Answer 1

[Subhadeep Koley]

It is very difficult to extract only one MSER feature per person in your image. But tweaking the parameters

'RegionAreaRange', and 'ThresholdDelta' you can get very close. Refer to the example below.

I = imread('people1.jpg');
I = rgb2gray(I);
regions = detectMSERFeatures(I,'RegionAreaRange',[3 3],'ThresholdDelta',2);
figure; imshow(I); 
hold on;
plot(regions,'showEllipses',false);
[features2, valid_point] = extractFeatures(I,regions);

Hope this helps!