[Solved] Why does increasing the sigma value in gaussian_filter cause the image to become more blurred? — Ans: Because a larger sigma increases the size of the Gaussian kernel, averaging... | SciPy

SciPy - Image Processing (scipy.ndimage)

Why does increasing the sigma value in gaussian_filter cause the image to become more blurred?

ABecause sigma controls the image brightness

BBecause a larger sigma increases the size of the Gaussian kernel, averaging more pixels

CBecause sigma changes the image resolution

DBecause sigma adds noise to the image

Step-by-Step Solution

Solution:

Step 1: Understand Gaussian kernel and sigma
Sigma defines the standard deviation of the Gaussian kernel, which determines how wide the kernel is.
Step 2: Effect of kernel size on blurring
A larger sigma means a wider kernel that averages over more pixels, causing more blur.
Final Answer:
Because a larger sigma increases the size of the Gaussian kernel, averaging more pixels -> Option B
Quick Check:
Higher sigma = larger kernel = more blur = A [OK]

Quick Trick: Larger sigma means wider kernel, more blur [OK]

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