A_process_that_accentuate_the_contribution_to_enhancement_made_by_high-frequency_components,_by_multiplying_the_highpass_filter_by_a_constant_and_adding_an_offset_to_the_highpass_filter_to_prevent_eliminating_zero_frequency_term_by_filter_is_known_as________$

A_process_that_accentuate_the_contribution_to_enhancement_made_by_high

1.	A_process_that_accentuate_the_contribution_to_enhancement_made_by_high-frequency_components,_by_multiplying_the_highpass_filter_by_a_constant_and_adding_an_offset_to_the_highpass_filter_to_prevent_eliminating_zero_frequency_term_by_filter_is_known_as________$
A.	Unsharp masking
B.	High-boost filtering
C.	High frequency emphasis
D.	None of the mentioned
Answer» D. None of the mentioned

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The transfer function of High frequency emphasis is given as: Hhfe(u, v) = a + b Hhp(u, v), for Hhp(u, v) being the highpass filtered version of image,a≥0 and b>a. for certain values of a and b it reduces to High-boost filtering. Which of the following is the required value?
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If, Fhp(u, v)=F(u, v) – Flp(u, v) and Flp(u, v) = Hlp(u, v)F(u, v), where F(u, v) is the image in frequency domain with Fhp(u, v) its highpass filtered version, Flp(u, v) its lowpass filtered component and Hlp(u, v) the transfer function of a lowpass filter. Then, unsharp masking can be implemented directly in frequency domain by using a filter. Which of the following is the required filter?

A_process_that_accentuate_the_contribution_to_enhancement_made_by_high-frequency_components,_by_multiplying_the_highpass_filter_by_a_constant_and_adding_an_offset_to_the_highpass_filter_to_prevent_eliminating_zero_frequency_term_by_filter_is_known_as________$

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