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Well am referring the following paper and trying to implement the algorithm as given in matlabThe only problem is how do i find a noisy pixel i.e Pixel with impulse noise? X seems to be the impulse pixel in an image which i have to calculate_____________________________________________ Input – Noisy Image h _______________________________________________ Step 1: Compute Xfor every pixel repeat steps from 2 to 7 Step 2: Initialize w = 3 Step 3: If X(i,j) ≠ Impulse pixelgoto step 7Step 4: ∆i,j = { h(i1,j1) | i-(w-1)/2 ≤ i1 ≤ i+(w-1)/2,j-(w-1)/2 ≤ j1 ≤ j+(w-1)/2}b=no. ofblack pixels in the windoww=no. of white pixels in the window Step 5: If ∆i,j ≠ NULL p(i,j) = mean(∆i,j) d(i,j) = | h(i,j) – p(i,j) | else if (w < wmax)w=w+2goto step 4elseif (b>w)h(i,j)=0 elseh(i,j)=255 Step 7: Goto next pixel Step 8: Calculate threshold t, from detailed coefficientmatrix d for every pixel Step 9: If (d(i,j)>t) h(i,j)=p(i,j) ____________________________Edit: To implement the PSM or the median filter method we need to set some parameters and a threshold value. This threshold value is dependent on the image and the noise density. So, to restore different images we need to check for a range of threshold values and find out the best one. So, in our proposed algorithm we removed the need to define a threshold value. The algorithm is intelligent and determines the threshold automatically.


Could you please summarize the goal of the article and the algorithm? A title would be nice as well to avoid link rot.

2019年10月20日35分29秒

so where does the term "Pixel with impulse noise" from? It does not exist in the code. Not sure what kind of answer you expect for your question, then

2019年10月21日35分29秒

If X(i,j) ≠ Impulse pixelhere this indicates that!

2019年10月21日35分29秒

Speed of recursive algorithms: Matlab < Python < C .

2019年10月20日35分29秒

... I thought about that too, but I did not find any sentence in the article stating that they know which pixels are noisy. Did you find one? Anyway, I think we agree that this is not a good paper...

2019年10月20日35分29秒

no i didn't, which makes the whole thing more dubious.

2019年10月20日35分29秒

i am confused as well now what kind of papers do people present ..

2019年10月20日35分29秒

vini, what do you mean? You want a better article to suppress salt and pepper noise?

2019年10月20日35分29秒

vini, the ones that can get away with it!

2019年10月20日35分29秒

I needed a way of finding these pixels (impulse)

2019年10月20日35分29秒

I've edited it.

1970年01月01日00分03秒