To find average of the frames extracted from a video

Question

srikanth 2012-2-9

0
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https://ww2.mathworks.cn/matlabcentral/answers/28542-to-find-average-of-the-frames-extracted-from-a-video

回答： Naga 2024-9-24，8:50

I wrote a code for extracting image frames from a video.But i am unable to get average of these extracted frames.can anyone please help me? my code is

clc;

close all;

clear all;

mov=aviread('viptraffic_original.avi');

info=aviinfo('viptraffic_original.avi');

k=info.NumFrames;

for i=1:k

m=aviread('viptraffic_original.avi',i);

f=frame2im(m);

figure,imshow(f);

end.

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Answer 1

Naga 2024-9-24，8:50

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https://ww2.mathworks.cn/matlabcentral/answers/28542-to-find-average-of-the-frames-extracted-from-a-video#answer_1521660

在 MATLAB Online 中打开

Hello Srikanth,

To calculate the average frame, you need to convert each frame to a numerical array, sum them up, and then divide by the total number of frames. Here's how you can modify your code to compute the average frame:

video = VideoReader('viptraffic_original.avi');
% Initialize a matrix to store the sum of all frames
sumFrames = zeros(video.Height, video.Width, 3, 'double');
% Loop through each frame to compute the sum
while hasFrame(video)
    frame = im2double(readFrame(video));
    sumFrames = sumFrames + frame;
end
% Compute the average frame
averageFrame = sumFrames / video.NumFrames;
% Display the average frame
imshow(averageFrame);
title('Average Frame');