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save matrices from loop

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Hello,
I am using this code that estimate Optical flow of a given video.
My purpose is to create a matrix that contain all the flow values for all while loop.
vidReader = VideoReader('Tennis Ball.avi'); % Read the Video size of frame in a video is 240x352
opticFlow = opticalFlowFarneback;
%% Estimate Optical Flow of each frame
while hasFrame(vidReader)
frameRGB = readFrame(vidReader);
frameGray = rgb2gray(frameRGB);
flow = estimateFlow(opticFlow,frameGray); % get 4 parameters size 240x352 each
% I aim to get all the the values get it in flow for each videoframe
%size of the matrix must be 240x352*53 where 53 is the number of frames in
%the video
end
I really apprecaite any help
  1 Comment
Adrian Brown
Adrian Brown on 15 Mar 2021
@Image Analyst @Jan I hope if you could please help with any suggest to my question.

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Accepted Answer

Bob Thompson
Bob Thompson on 15 Mar 2021
I could be wrong, but it seems like you just need to index flow.
vidReader = VideoReader('Tennis Ball.avi'); % Read the Video size of frame in a video is 240x352
opticFlow = opticalFlowFarneback;
%% Estimate Optical Flow of each frame
Frame = 0; % Initialize frame index
while hasFrame(vidReader)
Frame = 1; % Increase index for new frame
frameRGB = readFrame(vidReader);
frameGray = rgb2gray(frameRGB);
flow(:,:,frame) = estimateFlow(opticFlow,frameGray); % get 4 parameters size 240x352 each
end
  11 Comments
Adrian Brown
Adrian Brown on 18 Mar 2021
Dear @Bob Thompson I really appreciate any reply from you. from each suggestion I learned a new thing from you. The two option are very helpfull for me. Thank you for your time and all your suggestion.

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