Detection of red color RGB

i want a solution for my problem snice i am doing object detection using RGB and i cant get the orientation of the object . here is the code , also i have a problem with different light intesity that camera can detect object when light is normal but if it get lets dark camera cant detect

vid=videoinput('winvideo',1,'YUY2_640x480');
%Set the frames&RGB
set(vid,'FramesPerTrigger',inf);
set(vid,'ReturnedColorspace','rgb')
%Set timer of screenshoting of images per millisecond
vid.FrameGrabInterval=0.5;
%Acquiring video
start(vid);
%Set number of Frames in video
while(vid.FramesAcquired<=10000)
    %To store extracted frames
    data=getsnapshot(vid);
    %extracting the Red color from grayscale image
    diff_im=imsubtract(data(:,:,1),rgb2gray(data));
    %Filtering the noise
    diff_im=medfilt2(diff_im,[3,3]);
    %Converting grayscale image into binary image
    diff_im=im2bw(diff_im,0.18);
    %remove all pixels less than 300 pixel
    diff_im=bwareaopen(diff_im,300);
    %Draw rectangular boxes around the red object detected & label image
    bw=bwlabel(diff_im,8);
    
    stats=regionprops(bw,'BoundingBox','Centroid');
    %Show image
    imshow(data);
    
    hold on 
    %create a loop for the regtangular box
    for(object=1:length(stats))
        %saving data of centroid and boundary in BB & BC 
        bb=stats(object).BoundingBox;
        bc=stats(object).Centroid;
        %Draw the rectangle with data BB & BC
        rectangle('Position',bb,'EdgeColor','r','LineWidth',2)
        %Plot the rectangle output
        plot(bc(1),bc(2),'-m+')
        %Output X&Y coordinates
        a=text(bc(1)+15,bc(2), strcat('X: ', num2str(round(bc(1))), '    Y: ', num2str(round(bc(2)))));
        
    end
       hold off
end
stop(vid); 
%Flush the memory
flushdata(vid);
clear all;

Answer 1

[Image Analyst]

Use the Color Thresholder app (on the Apps tab of tool ribbon) to generate a function that will get a mask for the red blobs. Then you can get the orientation of the Old Spice package by using the Orientation property returned by regionprops().

As an example, see attached demo I just posted a few minutes ago for another poster.

See my Image Segmentation Tutorial: click here

[saeed ahmed]

i checked the tool but i want to know do i have to rebuild the code once more or to change or add more commands

[saeed ahmed]

plus i am using a live video not a images

[Image Analyst]

No problem. Just do color segmentation on each frame as you grab it.