基于OSA-UCS数据的CIECAM02图像复制色差评价

目的为了改进彩色图像复制时在不同观测环境下的误差,将优化后的色貌模型引入色彩信息转换。方法在分析CIECAM02-Jab用于彩色图像复制的色彩评价的基础上,提出利用OSA-UCS数据集建立新的优化色貌空间实验方案。利用线性回归的方法,调整原始颜色空间中的明度和彩度,构建出新的均匀颜色空间J_xa_xb_x。结果经过检验发现新的优化色貌空间J_xa_xb_x色差的离散程度减轻,空间更趋均匀,更加符合均匀性标准。结论新的优化色貌空间J_xa_xb_x修正了均匀颜色空间的均匀性,比CAM02初始色貌空间有了一定程度的提高,对彩色图像复制的色差评价取得了一定的效果。

Color Difference Evaluation on Image Reproduction of CIECAM02 Based on OSA-UCS Data

The work aims to improve the error of color image reproduction under different observation conditions and introduce the optimized color appearance model into the color information conversion. On the basis of analyzing the color evaluation on CIECAM02-Jab used for color image reproduction, a new experimental scheme of optimizing the color appearance space was proposed with the OSA-UCS data set. By using the method of linear regression, the lightness and chroma coordinate scale in the original color space was adjusted, and a new uniform color space Jxaxbx was constructed. After the inspection, it was found that the dispersion degree of color difference in the new optimized color appearance space Jxaxbx was reduced, and the space tended to be more uniform and more in line with the uniformity standard. The new optimized color appearance space Jxaxbx has modified the uniformity of the uniform color space and made some improvement compared to the CAM02 initial color appearance space. The color difference evaluation of color image reproduction has achieved certain results.