Read brightness level of the video

Hello,

I have been wondering about it and tried searching for software that could basically give me the maximum brightness value of the video. The video duration is 20 seconds and I just want to know the maximum brightness value. Could this value be obtained using matlab? If so, how would it be?

Answer 1

[Walter Roberson]

rgb2gray() gives you the brightness values of each pixel. Then you can max() that to get the maximum for the frame.

[Ayesha]

But how would you implement that for a video which is basically combination of 260 frames?

[Walter Roberson]

You do each frame in turn. If you store the maximum intensity for each frame into a vector, then the maximum intensity for the video as a whole would be max() of that vector.

[Ayesha]

I've been using this code to find the maximum brightness within the image which is basically the summed up bright of RGB components. It works, however, I would like to find the one brightest pixel from the entire image which this code does not really give. What do you suggest?

I = 'myImage.jpg';
S = sum(I,3) ;
[rows columns] = find(S == max(S(:)))