Question

The lowpass filtering process can be applied in which of the following area(s)?

(a) The field of machine perception, with application of character recognition

(b) In field of printing and publishing industry

(c) In field of processing satellite and aerial images

(d) All of the mentioned

The question was asked in unit test.

My doubt is from Gaussain Lowpass and Sharpening Frequency Domain Filters in division Filtering in Frequency Domain of Digital Image Processing

Answer 1

Correct choice is (d) All of the mentioned

For explanation I would say: In case of broken characters recognition system, LPF is used. LPF is used as preprocessing system in printing and publishing industry, and in case of remote sensed images LPF is used to blur out as much detail as possible leaving the large feature recognizable.