一种改进的视频画质增强算法及VLSI设计  

An Improved Video Quality Enhancement Algorithm and VLSI Design

作　　者：杨媛[1] 高勇[1] 房继军[1] 乔世杰[1] 韩超[1] 

机构地区：[1]西安理工大学电子工程系,陕西西安710048

出　　处：《电子学报》2012年第8期1655-1658,共4页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61102017);陕西省自然科学基金(No.2009JQ8014)

摘　　要：由于视频图像多样化,目前尚无较好的增强方法适应视频画质增强.本文提出了一种改进的数字视频画质增强算法,并进行了硬件电路的设计.与传统的基于直方图均衡的方法不同,首先在YUV色彩空间对输入图像的信息进行判断分类和对比度调整,然后对调整后的图像在RGB色彩空间下进行动态范围调整,并在HSV色彩空间下进行必要的亮度修正和色饱补偿.采用Verilog语言进行了算法的各模块电路设计,并在搭建的FPGA视频验证平台上进行了验证.实验结果表明,论文提出的画质增强算法能够适应各种不同场景的图像,处理后的图像明亮清晰、色彩逼真.Owing to digital television image diversification,there is no better enhancement method to enhance the image.An improved video quality enhancement algorithm is presented and the hardware circuit is designed in this paper. Unlike traditional histogram equalization approaches,the input images are divided into different classes by analyzing the information of input images and the contrast is adjusted in YUV color space firstly. Then the adjusted images would be processed as follows ： the dynamic range is adjusted in RGB color space, the luminance is amended and the saturation is compensated in HSV color space. The VLSI （ Very large Scale Integrated circuit） hareware circuit of the algorithm is designed with Verilog, and it is verified based on the FPGA （Field-Programmable Gate Array） video verification platform. The experimental results show that the presented algorithm can adapt the pictures of different scenes and the enhanced images are more clear and vivid.

关 键 词：色彩空间 画质增强 动态范围调整 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]