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视差会严重影响望远系统的瞄准和测量精度。传统的检测方法依靠人眼主观判读,只能定性检测。采用自动调焦原理研究了一种基于数字图像处理的视差自动检测方法。建立了调焦量与视差值之间关系的数学模型,通过检测系统的调焦量来得到被测望远系统的视差值。同时设计了用于视差检测的内调焦光学系统,该光学系统具有相对孔径大、成像质量高等特点;选取合适的调焦评价函数对图像进行清晰度的判读,从而找到成像最清晰时的调焦位置,最终通过控制系统实现对视差的自动检测,检测精度优于30″。该方法具有精度高、检测速度快的特点,提高了望远系统的视差检测效率。
Parallax can seriously affect the aiming and measurement accuracy of the telephoto system. The traditional detection methods rely on the subjective interpretation of the human eye, only qualitative detection. A method of automatic detection of parallax based on digital image processing is studied by using autofocus principle. The mathematical model of the relationship between the focusing amount and the disparity value is established. The disparity value of the system to be measured is obtained by detecting the focusing amount of the system. At the same time, an internal focusing optical system for parallax detection is designed. The optical system has the characteristics of large relative aperture and high image quality. Selecting the appropriate focusing evaluation function to interpret the definition of the image to find the clearest image Finally, the parallax is detected automatically by the control system, and the detection accuracy is better than 30 ".The method has the advantages of high precision and fast detection speed, and improves the parallax detection efficiency of the telescopic system.