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A specific range of gray-levels highlighting is the basic idea of __________(a) Contrast stretching(b) Bit –plane slicing(c) Thresholding(d) Gray-level slicingThe question was posed to me during an interview for a job.My query is from Piecewise-Linear Transformation Functions topic in chapter Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer»

Right choice is (d) Gray-level slicing

To ELABORATE: gray-level slicing is being done by TWO approach: One approach is to give all gray level of a SPECIFIC RANGE high value and a low value to all other gray levels.

Second approach is to BRIGHTEN the pixels gray-value of interest and preserve the background.

I.e. in both highlighting of a specific range of gray-level is been done.



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