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# Error In Getting Motion History Image In Matlab

Member Posts: 1

Hi, I have some problem in getting my motion history image. my video is already binarized. But can't get motion history image.

this is the code i m using. can someone tell me where i m wrong n how to fix it?

clear all

for i=1:218
% keyboard
end

data = uint8(255 * mat2gray (data));

``````MHI = data;
% Define MHI parameter T
T = size(data,3)+20; % # of frames being considered; maximal value of MHI

frame1 = data(:,:,1);

% Get the dimensions of the frames
[y_max, x_max] = size(frame1);

% Compute H(x,y,1,T) (the first MHI)
fst = MHI(:,:,1);
fst(fst>0) = T;
MHI(:,:,1) = fst;

% start global loop for each frame
for frameIndex = 2 : size(data,3)

% Load current frame from image array
frame = data(:,frameIndex);
frame_pre = MHI(:,frameIndex-1);

MHI(:,frameIndex) = frame_pre - 1;

% Set of all non-zero value to T
frame(frame > 0) = T;

[y,x] = find(frame > 1);

for i = 1 : size(y,1)
MHI(y(i,:), x(i,:), frameIndex) = frame(y(i,:), x(i,:));
end

end

figure, imshow(MHI(:,:,218), []);
``````
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