Title: Adaptive Thresholding

Essay Details

Subject: Technology
Author: William O
Date: May 15, 2016
Level: University
Grade: A
Length: 3 / 786
No of views: 0
Essay rating: good 0, average 0, bad 0 (total score: 0)

Essay text:

If, say, the left half of an image had a lower brightness range than the right half, we make use of Adaptive Thresholding. Global thresholding uses a fixed threshold for all pixels in the image and therefore works only if the intensity histogram of the input image contains distinct peaks corresponding to the desired subject and background...

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Hence, it cannot deal with images containing, for example, a strong illumination gradient. Local adaptive thresholding, on the other hand, selects an individual threshold for each pixel based on the range of intensity values in its local neighbourhood. This allows for thresholding of an image whose global intensity histogram doesn't contain distinctive peaks...

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