Question about finding mean in a matrix
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I am currently trying to figure out how to take a mean of an NxMxKxW matrix. I would like the resulting matrix to be a matrix of means of size NxMxK. The idea is, I have a collection of images and I would like to take the average of each pixel in each color channel and come up with a new color channel that contains those averages.
I tried doing something like this...
average = mean(image_collection,4);
Although I don't think this is quite right.
I included an image to show the idea I am trying to do.
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Image Analyst
le 14 Nov 2022
Is this a video? If so do you want to average the different color channels together, or have one average image for each separate color channel?
See attached demo to see how to compute the average movie frame. The result is a color image where each color channel is the mean of all corresponding color channels in the video.
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Image Analyst
le 14 Nov 2022
Another way, that I always use to show floating point images is to use [] in imshow():
imshow(framemean, []) % now it will work
DGM
le 14 Nov 2022
The displayrange parameter (i.e. []) controls the map scaling, so it only applies if the image is 2D.
Either way, one needs to maintain awareness of the class, range, and depth of the images they're working with and handle them accordingly.
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