瞬时高动态范围多光谱成像及颜色再现方法研究

The real-time and high-dynamic range multi-spectral imaging system, specially developed for the case of moving scenes, plays an important role in the fields of color science and many other relative technologies. In this project we will firstly study the hardware technology of the real-time and high-dynamic range multi-spectral imaging system. Then we will focus on the method of the color appearance reconstruction from the data-cube captured by our hardware system, according to the variation in illuminance, luminance, glossy, geometry and so on. Base on the ordinary optical components and image sensors, we will set up a set of the high-dynamic range multi-spectral imaging system. By use of our system, we can simultaneously get the data-cube of high-dynamic range multi-spectral image from the moving objects and scenes. And we will also focus on the spectrum and color reconstruction method for such system based on the color image appearance theory and visual-psychological perception assessments..The results of the project will be of much benefit to the development of the hardware and software technoloies of the real-time and high-dynamic range multi-spectral imaging system.

瞬变目标场景的实时高动态范围多光谱成像技术在颜色科学及其相关领域具有重要的理论意义和应用价值。本项目针对现实光照环境中目标场景的光照度、亮度、对比度、光泽度、几何尺度、方位等的瞬变特点，开展瞬变实时高动态范围多光谱成像技术及其颜色再现方法的研究。首先基于现有的光学器件及图像传感器的技术水平，研究瞬变目标场景的实时高动态范围多光谱成像的光学系统实现技术，扩展普通成像器件的光度范围，实现瞬变目标场景的高动态范围多光谱图像数据立方体的采集；在光学系统的基础上，基于现代色貌模型、图像色貌模型以及视觉心理物理学实验的评价方法，研究瞬变实时高动态范围多光谱成像系统的光谱重建及其颜色再现方法；完成瞬时高动态范围多光谱成像系统的原理实现装置的搭建，并通过实验验证其光谱重建和颜色再现的效果。为高动态范围瞬变目标场景的光谱图像获取及颜色标准化再现提供理论依据和技术支撑。

本项目针对自然目标场景的光照度、亮度、光泽度、几何尺度、方位等的瞬变特点，开展了快照式（Snapshot）、高动态范围光谱成像技术及其颜色再现方法的研究。基于现有的光电器件的技术水平，开展了快照式光谱成像系统的软硬件研究，并搭建了三光谱通道快照式光谱成像、多光谱通道快照式光谱成像等软硬件实验装置，从而实现了针对典型瞬变目标场景的多光谱图像数据立方体的采集，并建立了典型目标场景的多光谱图像数据样本集。在此基础上，研究并建立了快照式多光谱成像系统的光谱重建及其颜色再现方法，包括人工神经网络法、数据库比对法等。基于上述快照式多光谱成像技术，开展了大色域多基色显示技术的研究，并且取得了重要进展。本项目的研究成果，对于颜色科学理论、颜色测量、可见光目标探测与识别、人工颜色视觉模拟、高动态范围彩色显示技术等领域具有重要的理论意义和应用参考价值。