Q. Which of the following filtering is done in frequency domain in correspondence to lowpass filtering in spatial domain?

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Q. Using the feature of reciprocal relationship of filter in spatial domain and corresponding filter in frequency domain, which of the following fact is true?

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Q. Smoothing in frequency domain is achieved by attenuating which of the following component in the transform of a given image?

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Q. Which of the following is/are considered as type(s) of lowpass filters?

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Q. Which of the following lowpass filters is/are covers the range of very sharp filter function?

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Q. Which of the following lowpass filters is/are covers the range of very smooth filter function?

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Q. Butterworth lowpass filter has a parameter, filter order, determining its functionality as very sharp or very smooth filter function or an intermediate filter function. If the parameter value is very high, the filter approaches to which of the following filter(s)?

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Q. Butterworth lowpass filter has a parameter, filter order, determining its functionality as very sharp or very smooth filter function or an intermediate filter function. If the parameter value is of lower order, the filter approaches to which of the following filter(s)?

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Q. In a filter, all the frequencies inside a circle of radius D0 are not attenuated while all frequencies outside circle are completely attenuated. The D0 is the specified nonnegative distance from origin of the Fourier transform. Which of the following filter(s) characterizes the same?

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Q. In an ideal lowpass filter case, what is the relation between the filter radius and the blurring effect caused because of the filter?

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Q. The characteristics of the lowpass filter h(x, y) is/are_________

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Q. What is the relation for the components of ideal lowpass filter and the image enhancement?

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Q. Using the feature of reciprocal relationship of filter in spatial domain and corresponding filter in frequency domain along with convolution, which of the following fact is true?

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Q. State the statement true or false: “BLPF has sharp discontinuity and ILPF doesn’t, and so ILPF establishes a clear cutoff b/w passed and filtered frequencies”.

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Q. A Butterworth filter of what order has no ringing?

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Q. In frequency domain terminology, which of the following is defined as “obtaining a highpass filtered image by subtracting from the given image a lowpass filtered version of itself”?

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Q. Which of the following is/ are a generalized form of unsharp masking?

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Q. High boost filtered image is expressed as: fhb = A f(x, y) – flp(x, y), where f(x, y) the input image, A is a constant and flp(x, y) is the lowpass filtered version of f(x, y). Which of the following fact validates if A=1?

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Q. High boost filtered image is expressed as: fhb = A f(x, y) – flp(x, y), where f(x, y) the input image, A is a constant and flp(x, y) is the lowpass filtered version of f(x, y). Which of the following fact(s) validates if A increases past 1?

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Q. Unsharp masking can be implemented directly in frequency domain by using a filter: Hhp(u, v) = 1 – Hlp(u, v), where Hlp(u, v) the transfer function of a lowpass filter. What kind of filter is Hhp(u, v)?

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