Question

The salt pepper effect in an image can be reduced by __________________.
(a.) Spatial Filtering
(b.) Image Enhancement
(c.) Thresholding
(d.) None of the above

Answer 1

Answer:

the answer is ( none of the above )

Answer 2

Answer and Explanation:

the actual answer is by  median filter or a morphological filter.  ( which is not there in the options )

so the answer is none of the above ( OPTION D)

EXPLANATION-----

Salt-and-pepper noise is a form of noise sometimes seen on images. It is also known as impulse noise. This noise can be caused by sharp and sudden disturbances in the image signal. It presents itself as sparsely occurring white and black pixels. An effective noise reduction method for this type of noise is a median filteR or a morphological filter. For reducing either salt noise or pepper noise, but not both, a contraharmonic mean filter can be effective.