Acta Photonica Sinica, Volume. 41, Issue 2, 200(2012)
Enhancement Method of JPEG2000 Compression Image Based on Retinex Theory
In the process of enhancing the image compression, the traditional image enhancement method has some difficulties in the details recovery and generates blocky effect easily. A new method of JPEG2000 compressed image enhancement is proposed by applying the thory of Retinex into JPEG2000 compact frame. The dynamic range of scene illumination is adjusted through two low-frequency coefficients non-linear mapping with the low frequency coefficients as the wavelet transform and the high-frequency coefficients as the reflected light. By adjusting the high frequency coefficient, image contrast is enhanced,so that the image detail is trended overall. Then illumination quantity table is modifyed and more details is retained and block effect is controled through judging activities of each sub-block and adaptive quantization.The experimental results show that this algorithm performed well in the reinforcing effect and the compressed quality,etc.
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CHU Zhao-hui, WANG Rong-gui, ZHANG Xuan, ZHANG Xin-long. Enhancement Method of JPEG2000 Compression Image Based on Retinex Theory[J]. Acta Photonica Sinica, 2012, 41(2): 200
Received: Aug. 19, 2011
Accepted: --
Published Online: Mar. 9, 2012
The Author Email: Zhao-hui CHU (czh_2004@hfuu.edu.cn)