光学学报, 2014, 34 (s2): s233001, 网络出版: 2014-11-12
基于R矩阵法光谱反射率重建研究
Study of Spectral Reflectance Reconstruction Based on Matrix R Method
光谱学 光谱重建 R矩阵法 国画 主成分分析法 spectroscopy spectrum reconstruction matrix R method traditional Chinese painting principal component analysis
摘要
在给定的照明和观察条件下,由普通商业数码相机的信号值重建物体表面的光谱反射率是当前颜色科学工程领域的重要研究课题。选用佳能EOS 400D数码相机分别配合蓝色、绿色滤光片来采集物体表面的RGB信号,分别采用R矩阵法和主成分分析法(PCA)进行色卡和国画中指定色块的光谱反射率重建研究。实验结果表明,R矩阵法的色度精度和光谱精度均优于PCA。利用R矩阵法重建国画中参考色块光谱反射率,结果表明该算法能满足高精度艺术品再现的需要,具有较高的应用价值和现实意义,在颜色复制、颜色质量评估和数字典藏等领域拥有广阔的应用前景。
Abstract
Under the condition of given illumination and observation, it is an important research topic using ordinary commercial digital camera signal value to reconstruct surface spectral reflectance in the field of color science and engineering. The Canon EOS 400D digital camera is selected with blue and green filter to gather RGB signal on the surface of object respectively, the experiments using matrix R method and principal component analysis (PCA) are conducted on spectral reflectance reconstruction for specified color area of color card and traditional Chinese painting respectively. The experimental results show that the precision of chroma and spectra are better than PCA. The experimental results of the spectral reflectance of traditional Chinese painting reference color pieces reconstructed by matrix R method indicate that the algorithm can meet the needs of the art representation with higher accuracy, which has higher application value, practical significance, broad application prospects in color reproduction, color quality assessment, digital collection and other fields.
邹纪平, 杨葭, 李宏宁, 罗艳琳, 吕宪魁, 董明, 杨卫平. 基于R矩阵法光谱反射率重建研究[J]. 光学学报, 2014, 34(s2): s233001. Zou Jiping, Yang Jia, Li Hongning, Luo Yanlin, Lü Xiankui, Dong Ming, Yang Weiping. Study of Spectral Reflectance Reconstruction Based on Matrix R Method[J]. Acta Optica Sinica, 2014, 34(s2): s233001.