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In my WPF project, I'd like to display the difference between two images.

If the two images are identical, the result would be a transparent image. If they are different, it would be a pixel by pixel difference.

Is there an easy way to do this?

user380719
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  • Duplicate: http://stackoverflow.com/questions/613146/computing-the-difference-between-images – fredley Aug 17 '10 at 15:03
  • What do you mean by pixel-by-pixel difference? Euclidean distance of the RGB values or something else? – Ben S Aug 17 '10 at 15:06

3 Answers3

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Have a look at the techniques used by webcam "security" apps for motion detection: eg here

Basic
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1) First convert both the images to binary image format [Black and White].
2) Compare the pixel value of both images. If, they differ. Note the position in separate collection. [Note: Pixel by Pixel comparison may cause performance problem if those two images were too big]
3) Use Adorner to decorate those pixels in highlighting color you prefer.

HTH

Prince Ashitaka
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If i understood correctly then 

r,g,b=abs(r1-r2),abs(g1-g2),abs(b1-b2)
is this what you want ?
Agnius Vasiliauskas
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