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Noise in Image affecting its colors

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wana

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Hello every body,

If noise is in each image taken of a scene how I will let a java code assume that two images taken of the same scene are equal.Is the code taking the same color of the scene different in the two images? If so how can I face this problem ? I converted the two images to black and white before comparing them but the code is still considering them different . What if I make the condition to assume the two images the same is not that the RGB of the pixels of the first image equal to the RGB of the pixels of the second image, but I make the condition that the RGB of the pixels of the first image minus the RGB of the pixels of the second image <5 for example ?

Thank You
 

Working with real data you cannot simply compare the pixels, much better would be to:
- define a distance metric for a pixel pair, for example D = |R2-R1| + |G2-G1| + |B2-B1|
- evaluate the cumulative distance over the whole image (i.e. sum D for each pixel pair)
- compare the result with a threshold
This approach may be good or not so good depending on your application though.
 

I didn't get what is D ? What is a distance between a pixel pair ?
 

wana said:
I didn't get what is D ? What is a distance between a pixel pair ?
Click to expand...
it's the difference between two pixel in the same position in two images
 

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