b) Middle value after sorting the 9 neighbors – definition of median filter. Section B: Short Answer Q3. What is histogram equalization? Write its main advantage and one limitation.
Extract 3×3 neighborhood around row3,col3 (value=10) – rows 2-4, cols 2-4 (1-indexed): Image Processing Exam Questions And Solutions
c) Median filtering – it is a spatial operation using a neighborhood, not a point operation. Q2. In a 3×3 median filter applied to a grayscale image, the output pixel value is: a) Mean of the 9 neighbors b) Middle value after sorting the 9 neighbors c) Most frequent value d) Weighted sum of neighbors b) Middle value after sorting the 9 neighbors
10 12 12 14 16 12 10 12 14 16 12 12 10 14 16 14 14 14 10 18 16 16 16 18 20 Compute the output of a at center position (row 3, col 3) – 1-indexed (value=10). Use zero-padding. Write its main advantage and one limitation
Sobel operator approximates gradient using two 3×3 masks: