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.
出处
《计算机工程与设计》
CSCD
北大核心
2007年第17期4185-4186,4189,共3页
Computer Engineering and Design
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
image enhancement
bilateral filter
tone reproduction
local adaptation
contrast enhancement
logarithmic mapping
