Brightness and Contrast in Digital Image Processing.

Brightness: Brightness of an image is defined by the higher grey-scale values. Such as, if an image has grey-scale values like 175,200,255 etc, it can be said that brightness of the image is high. That is, the higher the grey-scale value the higher the brightness of an image. Thus brightness of an image is the higher values of the grey-scale levels.

Contrast: Contrast control determines the luminance (proportional to intensity) produces for white, with intermediate values toward black being scaled appropriately. Thus when changing contrast one is actually making a lower value to a lower one and higher value to a much higher one.

What is histogram? How low brightness and high brightness images can be identified from a histogram? DIP

Author: Tanmay Chakrabarty

Tanmay Chakrabarty is a former CSE student, currently working as a Senior Software Engineer with 5+ years of experience in the field of Web Application development in PHP+MySQL platform with strong skills in Javascript, JQuery, JQuery UI and CSS. He tries to write notes every week but fails due to heavy loads of duty.

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