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The feature(s) of a highpass filtered image is/are ___________

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The feature(s) of a highpass filtered image is/are  ___________

(a) Have less gray-level variation in smooth areas

(b) Emphasized transitional gray-level details

(c) An overall sharper image

(d) All of the mentioned

This question was addressed to me during an interview.

My question is based upon Filtering in Frequency Domain topic in section Intensity Transformations and Spatial Filtering of Digital Image Processing

1 Answer

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Best answer
Right choice is (d) All of the mentioned

Explanation: A highpass filter attenuates low frequency so have less gray-level variation in smooth areas, and allows high frequencies so have emphasized transitional gray-level details, resulting in a sharper image.

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