Labels:book | car | daily | reckoner | truck | window OCR: As was discussed earlier there isno reason why the transfer function must linear, monotonic The amples show three different types of scaling operations applied to the same Other Examples image Note th at the trans form in the upper right quadrant is lmost step function, and consequent ly the fesulting image 1s almost binary image (there are only few gray levels toward the middle of the scale; all other points are mapped black Of white). The exponential trans form 1n the lower right corner has resulted 1n photographic 'negative- like effect. reversing black and white as well as the intermediate levels. The transform in the lower left 15 somewhat sinusoid shaped resulting in an image that's perhaps interesting look at but one 1n which the levels have very little similarity to the original I ...
