编码光系统的颜色耦合与颜色失衡校正

吴海滨; 唐莎猷; 程浩; 王会; 于晓洋

doi:10.3788/CO.20130604.0521

编码光系统的颜色耦合与颜色失衡校正

doi: 10.3788/CO.20130604.0521

哈尔滨理工大学测控技术与仪器黑龙江省高校重点实验室, 黑龙江哈尔滨 150080

基金项目:

国家自然科学基金资助项目(No.61005035,No.61071051);黑龙江省教育厅科学技术研究资助项目(No.12521069);黑龙江省研究生创新科研资助项目(No.YJSCX2012-116HLJ);哈尔滨理工大学青年拔尖创新人才培养计划资助项目;哈尔滨理工大学大学生创新创业训练计划资助项目

详细信息

作者简介:
吴海滨(1977-),男,上海人,博士后,教授,硕士生导师,2000年于哈尔滨工业大学获得学士学位,2002年于哈尔滨工业大学获得硕士学位,2008年于哈尔滨理工大学获得博士学位,主要从事视觉检测与图像处理方面的研究。E-mail:woo@hrbust.edu.cn;王会(1987-),女,吉林长春人,硕士研究生,2012年于吉林师范大学获得学士学位,主要从事三维重建方面的研究。E-mail:765724425@qq.com

吴海滨(1977-),男,上海人,博士后,教授,硕士生导师,2000年于哈尔滨工业大学获得学士学位,2002年于哈尔滨工业大学获得硕士学位,2008年于哈尔滨理工大学获得博士学位,主要从事视觉检测与图像处理方面的研究。E-mail:woo@hrbust.edu.cn;王会(1987-),女,吉林长春人,硕士研究生,2012年于吉林师范大学获得学士学位,主要从事三维重建方面的研究。E-mail:765724425@qq.com

通讯作者:
吴海滨

中图分类号: TP391;O432.3
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出版历程
- 收稿日期: 2013-04-14
- 修回日期: 2013-06-17
- 刊出日期: 2013-08-10

Calibration of color coupling and color unbalance in coded structured light system

The Higher Educational Key Laboratory for Measuring &Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China

摘要

摘要: 为了减小编码光系统中的颜色耦合与颜色失衡的干扰,提高形状与颜色重建的准确度,建立了彩色编码光系统,并对其所采用的编解码方法、颜色重建的两个相关环节及颜色校正方法进行了研究。首先,给出了系统的彩色梯形相移强度比编解码法,分析了编解码过程中存在的RGB基色相互耦合现象,设计了应用Caspi模型硬件标定的颜色耦合校正方案;然后,给出了系统的逐点颜色重建法,分析了颜色重建过程中由表面曲率导致的颜色失衡现象,设计了利用表面几何信息校正颜色失衡的方案。实验结果表明:校正后单一绿色图像中的红色分量值约为校正前的1/10;单色表面色差约为0.1,趋近于人眼颜色分辨率,远低于校正前的0.4;重建的单色复杂被测表面颜色均匀、视觉效果良好,符合实际情况。提出的方法符合编码光系统抗干扰能力强的要求,有助于提高形状与颜色重建的准确度。
- 编码结构光 /
- 彩色编码 /
- 颜色重建 /
- 颜色校正
Abstract: To reduce the interference of color coupling and color unbalance and to increase the reconstruction accuracy of shape and color in a coded structured light system, a color coded structured light system was established and two color-related sections(coding principle and color reconstruction) and their color calibration methods were investigated. First, based on the coding principle by color trapezoidal phase-shifting intensity ratio, the mutual coupling phenomenon between RGB primary colors in coding process was analyzed, and color coupling calibration scheme by Caspi model and hardware calibration was designed. Then, based on point-by-point color reconstruction method, the unbalance phenomenon caused by surface curvature in color reconstruction process was analyzed, and color unbalance calibration scheme using surface geometry information was designed. Calibration experimental results indicate that the red component in pure green after calibration is about 1/10 of that before calibration; and calibrated chromatic aberration of unicolor surface is about 0.1, which approaches to the visual resolving power and is significantly less than that before calibration(0.4). Moreover, the reconstructed unicolor complex surface has uniform color and good visual effect and is accorded with measured surface. It can satisfy the system requirements of strong anti-interference, and is conduced to the reconstruction accuracy of shape and color.
- coded structured light /
- color coding /
- color reconstruction /
- color calibration

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参考文献(1)

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