Question

The ability that rotating the image and applying the filter gives the same result, as applying the filter to the image first, and then rotating it, is called _____________

(a) Isotropic filtering

(b) Laplacian

(c) Rotation Invariant

(d) None of the mentioned

I have been asked this question in unit test.

This key question is from Sharpening Spatial Filters in chapter Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer 1

Right option is (c) Rotation Invariant

The explanation: It is called Rotation Invariant, although the process used is Isotropic filtering.