image processing - Convert color video to grayscale video in MATLAB -


i trying operations on color video in matlab however, facing 2 problems:

  • i getting error while converting color video grayscale video. mean need convert color video grayscale video , write .avi file

  • how can perform operation (say edge detection) on grayscale frames (extracted color video) , can write result of edge detection in .avi video format?

my incomplete code (which consist of color format conversion) follows:

vid = videoreader('big_buck_bunny_480p_cut.avi'); numimgs = get(vid, 'numberofframes'); frames = read(vid); i=1:numimgs   frames(:,:,:,i)=rgb2gray(frames(:,:,:,i)); end

any pointer fix these 2 problems?

your first problem due trying assign 2d output of rgb2gray 3d array. can fix converting gray image rgb format:

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

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