Question: 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?
Options
A : Hhp(u, v) = Hlp(u, v)
B : Hhp(u, v) = 1 + Hlp(u, v)
C : Hhp(u, v) = – Hlp(u, v)
D : Hhp(u, v) = 1 – Hlp(u, v)
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