Modified Contrast Enhancement Algorithm and Its Hardware Design for Real-Time Applications

Author

Jui-Cheng Yen ; Hun-Chen Chen ; Run, Ray Shine ; Chong-Wei Li

Author_Institution

Dept. of Electron. Eng., Nat. United Univ., Miaoli, Taiwan

fYear

2014

fDate

10-12 June 2014

Firstpage

268

Lastpage

271

Abstract

In the paper, a modified histogram equalization for contrast enhancement of monochrome image/frame is proposed. We use the sampled and quantized image to create the look-up table and apply the table to obtain the enhanced image. The features of the modified scheme are as follows: 1) As compared with the original scheme by the MATLAB simulation, the difference between the results of modified and original schemes is tiny and indistinguishable by our eyes. 2) For requirement of real-time processing, the proposed sampling and quantization technique is more suitable for pipelining in hardware design. The proposed design is adequate for most of surveillance system even if the frame size of video is larger than HDTV.

Keywords

equalisers; image enhancement; image sampling; quantisation (signal); table lookup; HDTV; Matlab simulation; hardware design; look-up table; modified contrast enhancement algorithm; modified histogram equalization; monochrome image-frame contrast enhancement; quantization technique; quantized image; sampling technique; surveillance system; Hardware; Histograms; Quantization (signal); Real-time systems; Standards; Table lookup; Transforms; FPGA design; contrast enhancement; histogram equalization; pipeline architecture; real-time applications;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer, Consumer and Control (IS3C), 2014 International Symposium on

Conference_Location

Taichung

Type

conf

DOI

10.1109/IS3C.2014.78

Filename

6845870