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gamma correction for Brightness Preservation in Natural Images

Computer Systems Science & Engineering 2023年第3期44卷 2791-2807页

作者： Navleen S Rekhi Jagroop S Sidhu Amit Arora IKG Punjab Technical University KapurthalaPunjabIndia DAV Institute of Engineering&Technology Jalandhar144008PunjabIndia

Due to improper acquisition settings and other noise artifacts,the image degraded to yield poor mean preservation in *** simplest way to improve the preservation is the implementation of histogram *** of over-enhancement,it failed to preserve the mean brightness and produce the poor quality of the *** paper proposes a multi-scale decomposi-tion for brightness preservation using gamma *** transformation to hue,saturation and intensity(HSI)channel,the 2D-discrete wavelet transform decomposed the intensity component into low and high-pass *** the next phase,gamma correction is used by auto-tuning the scale *** scale is the modified constant value used in the logarithmic ***,the scale value is optimized to obtain better visual quality in the *** optimized value is the weighted distribution of standard deviation-mean of low pass ***,the experimental result is estimated in terms of quality assessment measures used as absolute mean brightness error,the measure of information detail,signal to noise ratio and patch-based contrast quality in the *** comparison,the proposed method proved to be suitably remarkable in retaining the mean brightness and better visual quality of the image.

关键词： Natural and aerial images wavelet transform gamma correction brightness preservation

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Design of AM-OLED gamma correction System Based on the LUT

Design of AM-OLED Gamma Correction System Based on the LUT

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中国光学学会2011年学术大会

作者： Tai Yonghang 1,a,Shi Junsheng 1,b,Yun Lijun 2,c,Chen zaiqing 2,d,Li Qiong 1,f,1 Color & Image Vision Lab.,Yunnan Normal University,Kunming,China 650092 2 School of Computer Science & Information Technology,Yunnan Normal University,Kunming China 650092

gamma correction is used to correct for the nonlinear relationship between luminance and brightness,to vision infor mation of reproduction source objects *** the p rinciple of gamma correc tion in OLED is *** the gray scale distortion of the SVGA050 m icro-display which is caused by the difference between the optical and electrical characteris tic property,we proposed a LUT gamma correction system of AM-OLED which is used the PIC18LF2550 as the MCU and the master of the I 2 C serial *** developm ent of the hardware system measurement verified the correction of VGA and CVBS video input and the p icture quality also apparently improved.

关键词： gamma correction AM-OLED LUT PIC2550

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Nonlinear Compensating Circuit For LCD Driver

Nonlinear Compensating Circuit For LCD Driver

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第五届专用集成电路国际会议（ASICON）

作者： Li Yushan Wang Cuiping Lai Xinquan Li Xianrui (Institute of Electronic CAD Xidian University Xi’an Shaanxi 710071 P. R. China

＜正＞ This paper presents a novel gamma correction circuit for overcoming electro-optic non-linearity of LCD. It has a good phase characteristic and a considerable bandwidth for video signal. The design can be widely... 详细信息

关键词： LCD video signal nonlinear gamma correction electro-optic response

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