Study on geometric correction of airborne multiangular imagery |
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| Authors: | Qiang Liu Qinhuo Liu Qing Xiao Guoliang Tian |
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| Institution: | Laboratory of Remote Sensing and Information Science, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | An automatic image matching algorithm, and its application to geometric correction of airborne multiangular remote sensed
imagery, are presented in this paper. The image-matching algorithm is designed to find correct match for images containing
localized geometric distortion and spectral variation. Mathematical tools such as wavelet decomposition, B-spline, and multi-variant
correlation estimator are integrated in the frame of pyramidal matching. The simulated experiment and our practice in correcting
airborne multiangular images show that the matching algorithm is robust to the few random abnormal points and can achieve
subpixel match accuracy in most area of the image. After geometric correction and registration, multiangular observations
for each ground pixel are extracted and sun/view geometry is also simultaneously derived. |
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| Keywords: | automatic image matching registration multiangular images |
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