CAJ | 학술논문

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。
침대영향LUT역반조도상질량적모판선택문제，제출료일충기우개진모의퇴화산법구취최우LUT역반조모판산법。해산법능대회도도상역반조，환확전지채색도상역반조。채색도상역반조시，충분고필채색도상R, G, B 3통도지간적상관성，장단통도모판확전위3통도。실험결과표명：본산법심득적모판구유전국최우성；여전통모판선택산법상비，이용본산법대회도도상화채색도상진행역반조적결과도재인안시각효과상경가，평균봉치신조비경고。
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.