Acta Geodaetica et Cartographica Sinica ›› 2020, Vol. 49 ›› Issue (10): 1295-1302.doi: 10.11947/j.AGCS.2020.20190246

• Photogrammetry and Remote Sensing • Previous Articles     Next Articles

Pixel extraction of reflected point source image for high spatial resolution optical remote sensing satellite

XU Weiwei1,2, ZHANG Liming1,2, LI Xin1,2, YANG Baoyun1,2   

  1. 1. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
    2. Key Laboratory of Optical Calibration and Characterization of Chinese Academy of Sciences, Hefei 230031, China
  • Received:2019-07-02 Revised:2020-02-29 Published:2020-10-31
  • Supported by:
    The National Natural Science Foundation of China(No. 41601388)

Abstract: Pixel extraction accuracy is one of the key factors for geometric calibration accuracy of high resolution optical remote sensing satellites. A pixel extraction method is presented based on the light and small, automated reflected point source, which obtained pixel coordinates of point source image by parameterized Gaussian model fitting. The preliminary results show that the collinear error of pixel coordinates extracted by the reflected point source method is less than 0.001 pixels. The relative standard deviation of the proportional constant is also less than 5‰. And pixel coordinates extraction accuracy of point source image is less than 0.05 pixels comparing with common methods such as centroid method. The reflected point source can not only achieve high-precision pixel extraction, but also realize high-precision geometric calibration and image quality evaluation of high resolution optical remote sensing satellites, which is of great significance for improving the accuracy of China's space remote sensing stereo mapping.

Key words: geometric calibration, pixel extraction, reflected point source, collineation checkout, scale checkout

CLC Number: