Color Detection and Tracking Using USB cam

I'm new to using the MATLAB tool, I'm enjoying it.

I would like the help of you to be able to make recognize colors, like red, through a USB camera. like this one: https://www.mathworks.com/help/vision/examples/face-detection-and-tracking-using-live-video-acquisition.html

Only in this he recognizes the face of people, I wanted with colors ... can you help me?

Answer 1

[Redha Reghioua]

vid=videoinput('winvideo',1,'YUY2_320x240');

set(vid,'FramesPerTrigger',inf);
set(vid,'ReturnedColorspace','rgb');
vid.FrameGrabInterval=5;
start(vid);
while(vid.FramesAcquired<=100)
    data=getsnapshot(vid);
    diff_im=imsubtract(data(:,:,2),rgb2gray(data)); % 1= red, 2=green, 3= bleu
    diff_im=medfilt2(diff_im,[3,3]);
    diff_im=im2bw(diff_im,0.18);
    diff_im=bwareaopen(diff_im,300);
    bw=bwlabel(diff_im,8);
    stats=regionprops(bw,'BoundingBox','Centroid');
    imshow(data);
    hold on
    for(object=1:length(stats))
        bb=stats(object).BoundingBox
        bc=stats(object).Centroid
        rectangle('Position',bb,'EdgeColor','r','LineWidth',2);
        plot(bc(1),bc(2),'m+');
        
    end
    hold off
end
stop(vid);
flushdata(vid);
clear all

[trinh]

THANKS

Answer 2

[Image Analyst]

See my attached video tracking demo where I track the movement of a green Sharpie marker.