Convert color video to grayscale video in MATLAB

Question

I am trying to do some operations on color video in MATLAB however, I am facing 2 problems:

• I am getting an error while converting color video to grayscale

Answer 1

Your first problem is due to trying to assign the 2D output of rgb2gray into a 3D array. You can fix this by converting the gray image back to RGB format:

  frames(:,:,:,i)=repmat(rgb2gray(frames(:,:,:,i)),[1 1 3]);