I want to remove background in the given image.

I want to remove background in the given image and only want these red markers in output image, i have almost 150 images of this type so a program that should that use for all frames.

[KALYAN ACHARJYA]

Already I had answered in your previous question, asked for measurement of the ankle (L and W), which also required to localized the most distance markers

Answer 1

[KALYAN ACHARJYA]

As the color of ROIs is quite clear, you can try to get a range of red pixels with different color models. Please note, the definition of colors is quite subjective, there may be a possibility of representing the same color in different ways. Some cases what you have seen may not be same for a computer or vice versa.

Here one ways, modify as requirements (Different Color Models and Pixel Values in dominant plane)

rgbImage=imread('image_preeti.jpeg');
ycbrImage=rgb2ycbcr(rgbImage);
[r,c]=find(ycbrImage(:,:,3)>180);
%......
rgbImage(r,c,1:3)=255;
imshow(rgbImage);