Can anybody explain about Movie function and cdata in MATLAB?

Question

I'm trying to figure out how to use cdata under Movie function in MATLAB. Can any expert please give me a short explanation? Thank you!

Answer 1

As you can find in the MOVIE function documentation, it plays a movie, which is actually an array of frames. Frame in its turn is a single "shot", or still image, represented in MATLAB by a structure with fields cdata (matrix of pixels data) and colormap (if used).

You can create a frame from current figure with GETFRAME function: F = getframe;. F.cdata will be an image matrix H x W x 3, with 3rd dimension representing 3 color channels - red, green and blue. You can show it with image(F.cdata) command.

If M is a movie frames, you can show just the first frame with image(M(1).cdata).

I would recommend you to play with examples on the MOVIE and GETFRAME help pages to have a better understanding.