MATLAB Answers

Taking average of pixel values across multiple frames

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Kevin P Meyer
Kevin P Meyer on 17 Jun 2021
Commented: Kevin P Meyer on 17 Jun 2021
I have a 1x3 cell containing image data as a 5504 x 8256 double, each value in the matrix is a pixel grayscale intensity value. Each cell is a picture at a different time or frame. What I want to do is take the average pixel value across each frame. So say I have N number of frames or pictures, I want to average pixel at (row 1, column 1) across those N frames and so on for (row 1, column 2),(row 1, column 3).....and end up with a 5504 x 8256 matrix that has the average pixel value across the number of frames in my cell. Any ideas on how to do this? I was messing around with 3 4x3 double matrices in a 1x3 cell for ease but I was not able to find an efficient way in a for loop to do this for each pixel location.

Answers (1)

Joseph Cheng
Joseph Cheng on 17 Jun 2021
Edited: Joseph Cheng on 17 Jun 2021
couldn't you just put it into a non cell matrix of 5504 x8256 x 3 then use mean(data,3) to take the mean in the 3rd dimension? or just add the cell index wise then divide by 3.
  3 Comments
Kevin P Meyer
Kevin P Meyer on 17 Jun 2021
awesome, that seems to be doing the trick, thank you so much!

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