change in a image
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hello
I want to find the change in a same image after some interval of time.How can i do this in matlab?
Please suggest me the ideas.
4 个评论
KALYAN ACHARJYA
2019-7-8
编辑：KALYAN ACHARJYA
2019-7-8
Please define what does change mean here? Any parameters.
It would be helpful to answer, if yo elaborate more.
To change on image you can do the number of ways-
- Add Noise
- Airthmetic Operations
- Transform
- Pixel value modification......
.........
Shilpi Gupta
2019-7-8
KALYAN ACHARJYA
2019-7-8
@Shilpi Which properties? Properties represents broad sense, please name the terms
Walter Roberson
2019-7-8
The only real properties that images have, for MATLAB purposes, are:
- size
- datatype
- RGB versus pseudocolor
- mapping of data ranges to color (caxis)
- callbacks
回答（1 个）
Bjorn Gustavsson
2019-7-8
The only meaningful interpretation I can come up with is that you have two images of the same scene taken from a static camera ("the same image" if only stored on disc will be constant over time or corrupted...). For that I'll assume that you have constant illumination of your scene. Then do something like this:
Im1 = imread('img1.png'); % or whatever filename
Im2 = imread('img2.png'); % or whatever filename
Im1 = double(Im1);
Im2 = double(Im2);
dImg = Im2 -Im1;
dImg = (dImg-min(dImg(:)))/(max(dImg(:))-min(dImg(:)));% Should map difference to between 0-1
imagesc(dImg)
HTH
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