Satellite linear array image RPC model positioning method
A positioning method and image technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as limitation of substitution accuracy, uneven imaging time of original remote sensing images, etc.
Pending Publication Date: 2021-07-23
CHINESE ACAD OF SURVEYING & MAPPING
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[0026] The invention provides a satellite line array image RPC model positioning method, which can realize the satellite line array image of non-uniform time imaging based on the geometric processing and target positioning method of RPC, and solve the uneven imaging time of the original remote sensing image, which leads to the rational polynomial model RFM The difficulty of limiting the substitution accuracy of the rigorous geometric model of the original remote sensing image
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[0049] The present invention relates to an original remote sensing image acquired by a TDI CCD. The original remote sensing image includes several image lines. The present invention realizes that the original remote sensing image is processed by virtual imaging to form a new image. The specific operation includes the following steps:
[0050] Step 1. Calculate the imaging moment of each image row center of the original remote sensing image: start processing from the first image row, and calculate the imaging moment of each image row center one by one, where the imaging moment of the first image row center adopts the formula C 1 =C 0 +T 1 / 2.0, the imaging moment of the center of other image lines adopts the formula C i =C i-1 +(T i-1 +T i ) / 2.0, where C 1 is the center moment of the first image line, C i is the central moment of the i-th image row, C i-1 The center moment of row i-1, T 1 is the imaging time of the first image line, T i-1 and T i are the imaging time ...
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The invention provides a satellite linear array image RPC model positioning method, which aims at solving the problem that the line imaging integral time of each image has difference and is difficult to directly fit an RPC image meeting the precision requirement; the method regenerates a new image through a time equalization virtual reimaging technology, and constructs a strict geometric model according to the geometric relationship during virtual imaging; the method further fits the PRC parameter of the new image, the new image and the corresponding RPC to realize positioning of the image RPC model. According to the new image obtained through the time equalization virtual imaging and the RPC parameters of the new image, the technology based on the RPC model can be continuously used for achieving positioning and drawing application of the image.
Description
technical field [0001] The invention relates to an image RPC model geometric positioning processing method in the field of satellite remote sensing image photogrammetry processing and application, in particular to a satellite line array image RPC model positioning method. Background technique [0002] Since the world's first remote sensing satellite TIROS-1 in 1960, high-resolution earth observation satellites have achieved leapfrog development in terms of performance and functions. The U.S. optical high-resolution satellite technology has always been in the leading position in the world. Digital Global satellites QuickBird-2, GeoEye-1, and Worldview 1-4 are the main commercial remote sensing satellites. The U.S. KH-11 for military purposes has a resolution of 0.1m. The current typical high-resolution optical satellites in Europe include the French SPOT 5-7 and Pleiades 1A / 1B satellites, the disaster monitoring constellation DMC designed and manufactured by the British Surre...
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Login to View More IPC IPC(8): G06T7/73
CPCG06T7/75G06T2207/10032G06T2207/30181
Inventor 程春泉于文青张越韩雅鑫王伟萍
Owner CHINESE ACAD OF SURVEYING & MAPPING