解决大幅面CCD相机三色分离的方法  

Improved method to solve color separation for large format CCD camera

作　　者：刘霖[1] 王平[1] 刘娟秀[1] 叶玉堂[1] 贾宏宇[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《光学精密工程》2012年第10期2260-2267,共8页Optics and Precision Engineering

基　　金：粤港招标关键领域重点突破项目(No.w0511159);国家兵器集团资助项目(No.w0511142)

摘　　要：针对大幅面彩色电荷耦合器件(CCD)相机三通道色彩彼此分离的问题,深入研究了CCD的内部结构,分析了多线阵彩色CCD三色分离的原因,提出了一种将三通道数据分开缓存的修正方法,并制作了国内第一台高速多线阵CCD大幅面扫描仪。该修正方法根据多线阵彩色CCD内部工艺结构,将三通道数据在硬件上进行分开缓存、重组,实现真实色彩的还原。理论分析与实际应用效果表明:经过处理后的图像R、G、B三色分离现象得到极大改善,在1 200DPI的分辨率下,三通道色彩未见分离。制作的大幅面扫描仪在600DPI的分辨率下,扫描速度可达5.08cm/s,扫描处理一张A0的图纸只需30s的时间,图像拼接处像素误差在±2以内。Abstract： To correct the color separation of a large format CCD camera, this paper researches the internal structure of the CCD, analyzes the reasons of three color separation of multi-linear-array CCDs and proposes a new correction method to cache three-channel data separately. Then, it establishes the first high-speed tri-CCD large format scanner domestically. On the basis of the internal process structures of the tri-CCD, this correction method caches and restructures the three-channel data in hard- ware separately, and restores the true color. The theoretical analysis and practical application results show that three-color separation phenomenon has been greatly reformed after treated, and three-channel color is not separation in 1 200 DPI. In 600 DPI, the scan speed of the scanner produced by our team has been up to 5.08 cm/s, and it only takes 30 s to scan a A0 size drawing. Furthermore, the splicing error of the image after scanning will be superior to ±2 pixels.

关 键 词：三线阵CCD相机 彩色CCD 大幅面扫描仪 三色分离 

分 类 号：TN386.5[电子电信—物理电子学] V447.3[航空宇航科学与技术—飞行器设计]