A method of contrast enhancement processing on wide-bits image

Xiang Peng; Zhiyong Xu; Xiaoping Qi

doi:10.1117/12.999430

30 November 2012 A method of contrast enhancement processing on wide-bits image

Xiang Peng, Zhiyong Xu, Xiaoping Qi

Proceedings Volume 8558, Optoelectronic Imaging and Multimedia Technology II; 85581S (2012) https://doi.org/10.1117/12.999430
Event: Photonics Asia, 2012, Beijing, China

Abstract

In order to obtain high-quality images in a project, modern cameras with wide-bits (12, 14 or 16 bits width) are usually used to acquire enough original information. Nevertheless, some kinds of data selection and transform processing are necessary to display such images on PC (8 bits width). Besides, the output image should include both high general contrast and clear details. This paper proposed a method with two major steps: for the first step is on the basis of partially overlapped sub-block histogram equalization (POSHE), and change the way of equalizing sub-block image, separate each sub-block recursively with different gray ranges. The second step is taking a kind of pseudo-color processing based on HIS space to enhance the visual effects, so that the image has rich layers and consistent with human’s perception. Experimental results show that the algorithm could keep the local details and the mean of the original brightness at the same time, enhanced the image effectively. Considered the adaptability on different scenarios, different objectives, and a reasonable amount of time complexity, this method could adapt the requirements of practical engineering applications.

Citation Download Citation

Xiang Peng, Zhiyong Xu, and Xiaoping Qi "A method of contrast enhancement processing on wide-bits image", Proc. SPIE 8558, Optoelectronic Imaging and Multimedia Technology II, 85581S (30 November 2012); https://doi.org/10.1117/12.999430

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