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access icon free Modified clipping based image enhancement scheme using difference of histogram bins

© The Institution of Engineering and Technology
Received 23/01/2019, Accepted 07/05/2019, Revised 15/04/2019, Published 08/05/2019

In this study, an image enhancement algorithm based on the modified histogram clipping scheme using a difference of histogram bins (MCDHB) has been proposed. The core idea of the proposed method is to ascertain the difference between the number of pixels’ in histogram bins of an input image and that of the traditional histogram equalised (HE) image. The calculated difference of each bin is partitioned into different blocks based on range criteria. The proposed algorithm can be attested as a global HE approach and mainly focuses on maintaining peaks in the histogram. The proposed MCDHB framework provides a good trade-off among contrast enhancement, shape of histogram, detailed information, and natural colour. Furthermore, the MCDHB framework is also incorporated with gamma correction for further improvement. The subjective and objective assessment confirms that both the proposed techniques can efficiently enhance the images, in a better way than those produced by classical techniques.

Inspec keywords: image enhancement

Other keywords: contrast enhancement; modified histogram; histogram bins; modified clipping based image enhancement scheme; MCDHB framework; image enhancement algorithm; input image

Subjects: Optical, image and video signal processing; Computer vision and image processing techniques

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