高速分幅成像系统中多路图像性能不一致的校正方法研究
Calibration Method for Non-Uniformity between Multiple Images from a High-Speed Multi-Frame CCD Camera
1 中国工程物理研究院流体物理研究所, 绵阳 621900
2 深圳大学光电子研究所, 深圳 621900
摘要
针对用于获取具有时间分辨能力的序列图像的高速分幅相机而言,其图像处理主要包括了图形的几何形变校正、图形位置配准、一幅图像中各像元响应的平场校正及各幅图像响应一致性的校正等内容,不仅要解决每幅图像本身的问题,还要解决各幅图像间的形态对比的问题。通过对这些处理目的所涉及的方法逐一进行进一步的研究,所获得的处理方法用于实际图像的处理获得了比较好的效果,大幅度提高了图像间的相关度和一致性,为解决多路成像系统图像性能不一致的现象提供了有效的方法,达到了实际应用的水平。
Abstract
For the high-speed multi-frame camer used to capture time-resolved sequence images, the main image processing includes geometric distortion calibration,image pixel position arrangement, flat-field correction for photo-response non-uniformity between the pixels in one image and the response calibration between different sequence images．These processings can meet the demand not only on each image itself but also on the morphological comparison of sequence images. The image processing method developed from related methods to solve the above problems provides an effective way to calibrate the non-uniformity and correlation coefficients between images, and scan be used to acquire the uniformity of the sequence images in the multi-images system in the practical applications.
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江孝国, 王远, 张开志, 郭宝平, 石金水, 李成刚. 高速分幅成像系统中多路图像性能不一致的校正方法研究[J]. 光学学报, 2006, 26(4): 531. 江孝国, 王远, 张开志, 郭宝平, 石金水, 李成刚. Calibration Method for Non-Uniformity between Multiple Images from a High-Speed Multi-Frame CCD Camera[J]. Acta Optica Sinica, 2006, 26(4): 531.
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