资源说明：Histogram equalization is widely used for contrast enhancement in a variety of applications due to its simple function and effectiveness. Examples include medical image processing and radar signal process- ing. One drawback of the histogram equalization can be found on the fact that the brightness of an im- age can be changed after the histogram equalization, which is mainly due to the flattening property of the histogram equalization. Thus, it is rarely utilized in consumer electronic products such as TV where pre- serving original input brightness may necessary in or- der not to introduce unnecessary visual deterioration. This paper proposes a novel extension of histogram equalization to overcome such drawback of the his- togram equalization.

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