Research of distortion rectification method for large vision angle IR imaging system

Xue-yuan Zhang; Zhen Ren; Zheng-hui Zhang; Guang-li Sun

doi:10.1117/12.2034075

11 September 2013 Research of distortion rectification method for large vision angle IR imaging system

Xue-yuan Zhang, Zhen Ren, Zheng-hui Zhang, Guang-li Sun

Proceedings Volume 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications; 89073P (2013) https://doi.org/10.1117/12.2034075
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

During the large visual angle IR image distortion rectification process there are some difficulties, first pick-up rectifying points is hard, second measuring and rectifying distortion are wasting time, third rectifying screen is difficult to make and it costs much. In order to overcome those disadvantages an IR imaging distortion rectification method, which using asterisk rectifying screen, is proposed. This method takes the image of a special made asterisk rectifying screen at first, then using SIFT operator to detect the real imaging positions of rectifying points in the image. Based on the real positions mean slope is used to compute theoretical imaging positions of those rectifying points. After that least square arithmetic is adopted to calculate the distortion parameters. The experiment result has shown that: the proposed method has the advantages of high precision, low cost, simple process and universal applicability.

Citation Download Citation

Xue-yuan Zhang, Zhen Ren, Zheng-hui Zhang, and Guang-li Sun "Research of distortion rectification method for large vision angle IR imaging system", Proc. SPIE 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications, 89073P (11 September 2013); https://doi.org/10.1117/12.2034075

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KEYWORDS

Distortion

Infrared imaging

Imaging systems

Imaging devices

Cameras

Prisms

Image processing

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