基于色阶重建的彩色图像增强算法  

Algorithm of color image enhancement based on tone reproduction

作　　者：顾耀林[1] 王家亮[1] 

机构地区：[1]江南大学信息工程学院,江苏无锡214122

出　　处：《计算机工程与设计》2007年第17期4185-4186,4189,共3页Computer Engineering and Design

摘　　要：色阶重建技术已应用于高动态范围图像的处理中。应用色调映射技术和局部亮度适应性原理,提出了彩色图像增强的算法来改善彩色图像的可视性。使用一个参数自适应的可变基的对数函数对亮度图像进行变换,采用双边滤波技术来计算每一像素的局部适应亮度,再对彩色图像的对比度进行调整。实验结果显示,图像的暗区部分获得了较好的可视性和细节,同时对比度获得改善。Tone reproduction is used to display high dynamic range images. With tone mapping and local adaptation, an algorithm of color image enhancement is proposed to improve visibility. A logarithmic mapping transformed image luminance to display luminance with variable base and adaptive parameter. Local adaptation luminance ofpixels is computed via bilateral filter. Local adaptation lumi- nance is applied to adjust the image contrast. The resulting image has a good visual quality, fine detail and well-balanced contrast.

关 键 词：图像增强 双边滤波 色阶重建 局部适应性 对比度增强 对数映射 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]