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A typical Fourier Spectrum with spectrum value ranging from 0 to 106, which of the following transformation is better to apply.

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A typical Fourier Spectrum with spectrum value ranging from 0 to 106, which of the following transformation is better to apply.

(a) Log transformations

(b) Power-law transformations

(c) Negative transformations

(d) None of the mentioned

This question was addressed to me by my school principal while I was bunking the class.

The question is from Basic Grey Level Transformation in section Image Enhancement of Digital Image Processing

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Right option is (a) Log transformations

The explanation: The log transformation compresses the dynamic range of images and so the given range turns to 0 to approx. 7, which is easily displayable with 8-bit display.

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