光谱反射率是颜色的固有属性不受外界条件的影响, 能尽最大可能保留颜色的信息, 被广泛应用在纺织、彩色印刷、古字画颜色修复等领域。为了缩短获取多光谱图像周期以及避免多光谱图像之间像素匹配不准问题, 提高三通道光谱反射率重构精度。提出一种基于扩展三通道响应项光谱反射率重构算法。实验结果证明［rg2rb2gr2gb2br2bg2］三次立方根项的引入可以提高光谱重构反射率色度精度和光谱精度;客观验证24个色块光谱反射率重构精度优于现有算法, 提出的算法具有一定的应用价值。

Spectral reflectance is the inherent property of color, which is not affected by external conditions. It can retain the information of color as much as possible. It is widely used in textile, color printing, color restoration of ancient Chinese characters and paintings and other fields. In order to shorten the acquisition period of multi-spectral images and solve the problem of pixel matching between images, the accuracy of three-channel spectral reflectance reconstruction is improved. A spectral reflectance algorithm based on extended three-channel response expansion is proposed. The experimental results show that the introduction of the cubic cube root of ［rg2rb2gr2gb2br2bg2］ can improve the chroma precision and spectral precision of spectral reflex reflectivity. By objectively verifying that the spectral reflectivity reconstruction accuracy of 24 color patches is better than the existing algorithms, the proposed algorithm has certain application value.