MATLAB: Extract data from array at set intervals to new array

arrayimage processingintensityintervalMATLABvideo

I'm extracting some intensity data from video frames and storing it in an array. Frame number along x and amplitude on y, usual stuff.

How would I create a new array which stores the y(row) value every 24 frames?

Thanks

Best Answer

you can use indexing.

y(1:23:end)

Related Solutions

MATLAB: Extract data at regular intervals

Are you asking for just

X = ones(2e4,2);
Y = X(1:10:end,:);

Y is a two-column matrix containing every 10-th measurement (or measurements taken every 50 seconds).

MATLAB: Can i start reading frames from a specific index with aviread

Just read the whole movie in:

mov = aviread(movieFullFileName);
% movie(mov);

Then start processing from where you want.

% Determine how many frames there are.
numberOfFrames = size(mov, 2);
for frame = startingFrame : numberOfFrames
    % Extract the frame from the movie structure.
    thisFrame = mov(frame).cdata;

Alternatively, use the VideoReader class and read().

Best Answer

Related Solutions

MATLAB: Extract data at regular intervals

MATLAB: Can i start reading frames from a specific index with aviread

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