基于改进模拟退火算法的LUT逆半调模板选择  

Template Selection for LUT Inverse Halftoning Based on Improved Simulated Annealing Algorithm

作　　者：卢永乐[1] 文志强[1] 李建飞[1] 

机构地区：[1]湖南工业大学计算机与通信学院,湖南株洲412007

出　　处：《湖南工业大学学报》2015年第1期76-82,共7页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(61170102);湖南省自然科学基金资助项目(11JJ3070);湖南省教育厅科研基金资助项目(12A039)

摘　　要：针对影响LUT逆半调图像质量的模板选择问题,提出了一种基于改进模拟退火算法求取最优LUT逆半调模板算法。该算法能对灰度图像逆半调,还扩展至彩色图像逆半调。彩色图像逆半调时,充分考虑彩色图像R,G,B 3通道之间的相关性,将单通道模板扩展为3通道。实验结果表明:本算法寻得的模板具有全局最优性;与传统模板选择算法相比,利用本算法对灰度图像和彩色图像进行逆半调的结果图在人眼视觉效果上更佳,平均峰值信噪比更高。In view of template selection problems which affected the LUT inverse halftone image quality, puts forward a solution to an optimal LUT inverse halftone template based on improved simulated annealing algorithm. The algorithm can be used for grayscale image inverse halftoning and is extended to color image. As for color image halftoning, the correlation between 3 channels of R, G, B color image is considered, and the template is extended from single to triple. The experimental result shows that the proposed algorithm finds template with global optimality, and compares with traditional template selection algorithm, the result picture adopting the optimal template for grayscale and color image inverse halftone restora-tion gets better effect in human vision system（HSV） and the average peak signal to noise ratio is higher.

关 键 词：逆半调 模拟退火算法 模板选择 查找表 彩色图像 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]