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Repeat the above Problem 1 using a harmonic mean filter. Repeat Problem 5 . 1 using a contraharmonic mean filter with Q = - 1
Repeat the above Problem using a harmonic mean filter.
Repeat Problem using a contraharmonic mean filter with
In answering the following, refer to the contraharmonic
filter in Eq
a Explain why the filter is effective in eliminating pepper noise when is positive.
b Explain why the filter is effective in eliminating salt noise when is negative.
c Explain why the filter gives poor results when the wrong polarity is chosen for
d Discuss the expected behavior of the filter when Q
With reference to Eq obtain equations for:
a An ideal notch filter transfer function.
b A Gaussian notch filter transfer function.
c A Butterworth notch filter transfer function. A linear, space invariant system has the impulse response
where a and are constants, and and are discrete quantities. Answer the following, assuming negligible noise in each case.
a What is the system transfer function in the frequency domain?
b What would the spatial domain system response be to a constant input,
c What would the spatial domain system response be to an impulse input,
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