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Journal of Electronic Imaging

Adaptive contrast enhancement based on highly overlapped interpolation
Author(s): Zhi Qing Wu; J. A. Ware; Jianmin Jiang
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Paper Abstract

Conventional pointwise adaptive contrast enhancement is very effective in adjusting the contrast of medical images with large regional brightness differences. However, the pointwise algorithm is computationally intensive, thus limiting its practical application. Two existing stepwise algorithms cut down the computational overhead by adopting regional interpolation and averaging techniques respectively. Based on these two stepwise algorithms, we describe an adaptive contrast enhancement in which a new kind of variable image filter suitable for array multiplication is employed. Experiments show that the new algorithm can avoid the generation of blocking effects and effectively reduce image distortion in enhancement. Moreover, the speed of the algorithm can be adjusted according to different requirements.

Paper Details

Date Published: 1 July 2005
PDF: 8 pages
J. Electron. Imag. 14(3) 033006 doi: 10.1117/1.1993624
Published in: Journal of Electronic Imaging Volume 14, Issue 3
Show Author Affiliations
Zhi Qing Wu, Univ. of Glamorgan (United Kingdom)
J. A. Ware, Univ. of Glamorgan (United Kingdom)
Jianmin Jiang, Univ. of Bradford (United Kingdom)

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