Which of the following shows three basic types of functions used frequently for image enhancement?(a) Linear, logarithmic and inverse law(b) Power law, logarithmic and inverse law(c) Linear, logarithmic and power law(d) Linear, exponential and inverse lawI have been asked this question in exam.Question is taken from Basic Intensity Transformation Functions topic in portion Intensity Transformations and Spatial Filtering of Digital Image Processing

Which of the following shows three basic types of functions used frequ

1.	Which of the following shows three basic types of functions used frequently for image enhancement?(a) Linear, logarithmic and inverse law(b) Power law, logarithmic and inverse law(c) Linear, logarithmic and power law(d) Linear, exponential and inverse lawI have been asked this question in exam.Question is taken from Basic Intensity Transformation Functions topic in portion Intensity Transformations and Spatial Filtering of Digital Image Processing
Answer» Right ANSWER is (b) Power law, LOGARITHMIC and inverse law To explain: In introduction to gray-level transformations, which shows three basic types of FUNCTIONS used frequently for image enhancement: LINEAR (negative and identity transformations), logarithmic (log and inverse-log transformations), and power-law (nth power and nth root transformations).The identity function is the trivial case in which output intensities are identical to input intensities. It is INCLUDED in the graph only for completeness.

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