How to analyze every single pixels intensity in a video clip?

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Hirithar
Hirithar 2024-5-10
评论： Image Analyst 2024-5-19
I need help get each single pixel's intensity in a video clip (grayscale). For example, in a video clip containing 150x250 pixels and 1000 frames, I need to obtain the intensity one by one, either row-wise or column-wise.
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Image Analyst
Image Analyst 2024-5-12
If you have, say, a million pixels in your video frame, you can't do a million line plots. But you can plot the average color or brightness of one, or a few, regions over time. This is what my Answer below does. Did you even see it (scroll down) or try it? If not, why not?
Hirithar
Hirithar 2024-5-12
I downloaded it, I'm a medical student. I'm trying to undestand what the code is, for sure I will let you know. Thanks for the support.

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回答（2 个）

Image Analyst
Image Analyst 2024-5-11
See my attached demo where I find the mean R, G, and B mean of every frame in a video and plot them. Adapt the region to what you need, like a single row or column instead of the whole frame.
Hirithar
Hirithar 2024-5-17
I came up with this code for pixel analysis. Could you please take a look?
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Hirithar
Hirithar 2024-5-19
I'm just picking up the intensity value of a pixel by its coordinates (row, column) to plot a 3-second spectrum. In my case, the frame rate is 30 fps, which means I'm plotting the spectrum for 90 frames.
Image Analyst
Image Analyst 2024-5-19
I strongly suggest that you use all three indexes when referencing a 3-D array.

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