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30 November 2009 Research and hardware implementation of image enhancement algorithm in OLED system
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During the process of generation and transmission, images will be influenced by the performance of imaging system, quantization noise or some other actors. The image will appear some phenomenons like clarity decrease and low contrast. For the sake of improving the picture quality in OLED system, time sequence control logic and hardware of the whole OLED system were implemented based on the detailed analysis of OLED panel electrical characteristics and various gray scale scanning principles. Sub-field scanning working mode is adopted in the design. Gray scale is 64 and vertical sweep frequency is 60Hz~100Hz.FPGA is the core control device in the whole system, the DVI decoded signal is processed. The design realizes the real-time video display on OLED. The utilization of parameters regulated homomorphic filtering technology is studied to improve the quality of color image. At first, the high and low frequency parts are departed with the help of illumination reflectance model.Then the digital image is processed with approximate high-pass filter, the simplified filtering algorithm made a compromise solution between the complex of hardware implementation and image quality. In the end, by the frequency domain inverse transformation, images got enhanced. The experiment results show that the particular information extrudes and the whole visual effect is improved after the process.
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Meihua Xu, Ke Li, and Yule Fan "Research and hardware implementation of image enhancement algorithm in OLED system", Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 75061U (30 November 2009);


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