低照度下六基色微光融合的彩色成像方法研究

Research on Color Imaging Method of Six Primary Color Low Light Level Fusion under Low Illumination

摘要: 为突破低照度条件下传统三基色成像器件光谱利用率低的限制，本文提出了一种低照度下六基色微光融合的彩色成像方法，借鉴虾蛄复眼结构的十二原色色谱感光模型，优化并确定适用于彩色微光成像的六基色虾蛄眼仿生色谱体系；完成六基色滤光片参数设计，且加入可见光波段全透滤光片以提高成像灵敏度；建立色彩传递模型，实现由六基色色域向RGB颜色空间的色谱映射；在微光实验室中完成多波段微光图像的采集，设计相应算法并实现，完成多波段微光图像融合与图像质量及色彩还原度评价。评价结果表明，本文提出的低照度下六基色微光融合的彩色成像方法能够提高可见光光谱利用率，进而得到清晰、高信噪比、颜色信息准确且丰富的真彩色夜视图像。

Abstract: In order to break through the limitation of low spectral efficiency of traditional trichromatic imaging devices under low illumination conditions, in this paper, a color imaging method of six primary colors low light level fusion under low illumination is proposed. Referring to the twelve primary color chromatographic sensitivity model of Squilla compound eye structure, the six primary colors Squilla eye bionic chromatographic system suitable for color low light level imaging is optimized and determined; the parameters of six primary colors filter are designed, and the visible light band full transparent filter is added to improve the imaging sensitivity; the color transfer mode is established. In the low light level laboratory, the acquisition of multi band low light level image is completed, the corresponding algorithm is designed and implemented, and the multi band low light level image fusion, image quality and color restoration degree evaluation are completed. The evaluation results show that the proposed six primary color low light level fusion color imaging method under low illumination can improve the utilization of visible light spectrum, and then get clear, high signal-to-noise ratio, accurate and rich color information of true color night vision image.