Which of the following in an image can be removed by using a smoothing filter?
A. Sharp transitions of brightness levels
B. Sharp transitions of gray levels
C. Smooth transitions of gray levels
D. Smooth transitions of brightness levels
Answer:A
Which of the following in an image can be removed by using a smoothing filter?
A. Sharp transitions of brightness levels B. Sharp transitions of gray levels C. Smooth transitions of gray levels D. Smooth transitions of brightness levels
Explanation: The value of each pixel in an image is replaced by the average value of the grey levels in a smoothing filter. As a result, the sharp transitions in grey levels between pixels are reduced. This is done because random noise generally has strong gray-level transitions.