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SAR image correction method based on improved phase consistency characteristic vector base map matching

A technology of image correction and feature vector, which is applied in the field of remote sensing to achieve the effect of improving accuracy

Active Publication Date: 2017-11-10
中科卫星山东科技集团有限公司
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Problems solved by technology

[0020] In view of the above technical problems, this disclosure provides an automatic correction method for SAR images based on improved phase consistency features for vector basemap matching. Automatically corrects problems, realizes automatic matching of SAR images and vector basemaps, and improves the accuracy of matching results

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  • SAR image correction method based on improved phase consistency characteristic vector base map matching
  • SAR image correction method based on improved phase consistency characteristic vector base map matching
  • SAR image correction method based on improved phase consistency characteristic vector base map matching

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[0062] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0063] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the dire...

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Abstract

The invention provides an SAR image correction method based on improved phase consistency characteristic vector base map matching. The method comprises steps that a vector base map is converted into a binary grid image according to a designated resolution; geographic coding of a to-be-corrected original SAR image is carried out according to the designated resolution; a common area of the two images is determined according to the geographic information of the grid vector base map and the SAR image after geographic coding; a linear characteristic map of the SAR image after geographical coding is extracted based on an improved phase consistency operator, and the linear characteristic map is automatically matched with the grid vector base map; template matching processing of a vector base map slice and an image slice after linear characteristic extraction is carried out; matching point pairs are screened through a Ransac method to remove error matching points to acquire the control point information of the original SAR image; an image affine transformation model is employed to carry out image correction processing to acquire an SAR image with accurate geometric positioning. The method is advantaged in that matching result accuracy is improved.

Description

technical field [0001] The present disclosure relates to the technical field of remote sensing, in particular to a SAR image correction method based on improved phase consistency feature vector basemap matching. Background technique [0002] Synthetic Aperture Radar (SAR), as an all-weather and all-weather earth observation method, has obvious advantages in disaster areas, cloudy and foggy conditions. In recent years, the number of SAR remote sensing satellites in orbit has been increasing, including PalSAR, Cosmo, RadarSat, TerraSAR, Gaofen-3, etc. have acquired more and more SAR remote sensing image data. The precise positioning of remote sensing images is an important prerequisite for the quantitative application of remote sensing data. The conventional geometric correction processing of remote sensing images needs to be performed based on field control points. Poor timeliness [Qiu Xiaolan, Han Chuanzhao, Liu Jiayin. A geometric correction method for spaceborne SAR based...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T3/00G06T7/13G06T7/33
CPCG06T7/13G06T7/33G06T2207/30181G06T3/02G06T5/80
Inventor 王峰向俞明尤红建刘佳音
Owner 中科卫星山东科技集团有限公司
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