物体反射光谱的多色拟合技术研究

Research on Multicolor Fitting Technology of Object Reflectance Spectrum

传统基于RGB体制的显示技术,其本质是异谱同色成像,为进一步提升显示端与真实物体反射光谱匹配度,减少色差,本文提出一种基于多通道的反射光谱重建方法,可在显示端更加接近物体反射特性,色差更小,效果更真实。本方法通过增加显示通道的数量,扩大了光谱范围,提高显示信息的完整性;并利用QPSO (量子粒子群)多光谱重建算法,拟合真实物体表面反射光谱,达到重建物体真实反射光谱目的。在实验验证中,首先利用LED光源,对4种标准光源照射下的24色标准色卡中的各个颜色进行反射光谱重建,共计384组光谱。当通道数量从3增加到8时,光谱匹配度从80%增加到大于90%,且平均色差小于2,验证了本方法可以大幅度提高显示光谱与真实物体的光谱匹配度,同时大幅减少色差。

The essence of the traditional display technology based on RGB system is heterochromatic imaging. In order to further improve the matching between the display end and the reflection spectrum of the real object and reduce the color difference, this paper proposes a re-flection spectrum reconstruction method based on multi-channel, which can be more accurate on the display end. Close to the reflection characteristics of the object, the chromatic aberration is smaller, and the effect is more realistic. By increasing the number of display channels, the method expands the spectral range and improves the integrity of the displayed information;and uses the QPSO (quantum particle swarm) multispectral reconstruction algorithm to fit the reflection spec-trum of the real object surface to achieve the purpose of reconstructing the real reflection spectrum of the object. In the experimental verification, the LED light source was used to reconstruct the re-flection spectrum of each color in the 24-color standard color card under the illumination of 4 standard light sources, resulting in a total of 384 groups of spectra. When the number of channels increased from 3 to 8, the spectral matching degree increased from 80% to more than 90%, and the average chromatic aberration is less than 2. It is verified that this method can greatly improve the spectral matching between the displayed spectrum and the real object, and at the same time great-ly reduce the chromatic aberration.