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In order to improve image processing quality and boost processing rate, this paper proposes an real-time automatic image enhancement algorithm. It is based on the histogram equalization algorithm and the piecewise linear enhancement algorithm, and it calculate the relationship of the histogram and the piecewise linear function by analyzing the histogram distribution for adaptive image enhancement. Furthermore, the corresponding FPGA processing modules are designed to implement the methods. Especially, the high-performance parallel pipelined technology and inner potential parallel processing ability of the modules are paid more attention to ensure the real-time processing ability of the complete system. The simulations and the experimentations show that the algorithm is based on the design and implementation of FPGA hardware circuit less cost on hardware, high real-time performance, the good processing performance in different sceneries. The algorithm can effectively improve the image quality, and would have wide prospect on imaging processing field.

This paper presents the design of a high-performance processor used for head-mounted display (HMD) applications targeting stereo video processing. The proposed hardware architecture of the video processor consists of three major parts: an adaptive 3-dimensional (3D) video decoder to accurately decoding the stereo composite video base band signal (CVBS) source, a video source separation module to generate the 3D display effects while maintaining the original field frequencies on both output channels, and a image post-processing module to enhance the display quality. Furthermore, the paper discusses the key design issue on compact hardware structure for SDRAM access, which is ultimately achieved in a single general SDRAM by data clustering and integration. Both FPGA and ASIC implementations are carried out and the results carefully compared showing that the designed video processor for 3D display could produce well immersing feeling with limited costs in effective decreasing the noise, flicker and crosstalk.