Median filter window size

1. What is window size in median filter?
2. What is window size in image processing?
3. Is median filter better than mean filter?
4. Why is median filter better than Gaussian?

What is window size in median filter?

7, while the median filter with a 5*5 window size gives the best result for the cameraman images with low noise variances, the median filter with a 7*7 window size gives the best result for the cameraman images with the high noise variances.

What is window size in image processing?

Batch, Kernel, Window and Mask are same terminology in Image Processing. Window size = 2n+1. if n = 0; window size is 1, then the processing is called as point processing, that is to perform pixel by pixel.

Is median filter better than mean filter?

Since the median value must actually be the value of one of the pixels in the neighborhood, the median filter does not create new unrealistic pixel values when the filter straddles an edge. For this reason the median filter is much better at preserving sharp edges than the mean filter.

Why is median filter better than Gaussian?

The median filter is much better at preserving straight edge structure than Gaussian smoothing, but if the edge is curved then image degradation occurs. At corners, other two dimensional features and thin lines the median does not perform well with regard to structure preservation.