[Solved] Why does the median filter preserve edges better than the uniform filter? — Ans: Because median filter selects the middle value, avoiding smoothing across edges | SciPy

SciPy - Image Processing (scipy.ndimage)

Why does the median filter preserve edges better than the uniform filter?

ABecause uniform filter ignores edge pixels during filtering

BBecause median filter averages all values, smoothing edges

CBecause uniform filter replaces values with median, preserving edges

DBecause median filter selects the middle value, avoiding smoothing across edges

Step-by-Step Solution

Solution:

Step 1: Understand median filter behavior
The median filter replaces each value with the median of neighbors, which avoids averaging across edges and preserves sharp transitions.
Step 2: Contrast with uniform filter
Uniform filter averages values, which smooths edges and blurs transitions.
Final Answer:
Because median filter selects the middle value, avoiding smoothing across edges -> Option D
Quick Check:
Median filter preserves edges by median selection [OK]

Quick Trick: Median filter picks median, avoids blurring edges [OK]

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