A method for estimating incident angle of sar image

A technology of incidence angle and image, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of restricting the application of SAR images and the inability to estimate the incidence angle of radar images, etc., and achieve the effect of improving the application level
CN104574428BInactive Publication Date: 2017-06-16INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
Publication Date
2017-06-16
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an SAR image incident angle estimation method. The method comprises the following steps: firstly preprocessing an SAR image, acquiring an image section containing a building target from an SAR slang-range image, selecting two bright lines and intersection thereof of the building target in the image, determining a straight line passing through the intersection and parallel to an azimuth, wherein the two included angles between the straight line and the two bright lines are azimuth angles; estimating the azimuth angle value; and estimating the image incident angle value according to the quantitative relation between the image incident angel and the azimuth angle. The SAR image incident reference value is estimated by utilizing two bright lines of the building target in the SAR slant-range image and the quantitative relation between the included angle formed by two bright lines and the azimuth and the image incident angle, the SAR image incident angle parameter is precisely estimated under the condition that information such as flying height of the sensor is in absent, the SAR image analysis, parameter inversion and information extraction process can be satisfied, the application level of the SAR image is improved, and the method is especially suitable for the emergency relief with high timeliness demand.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of SAR image incident angle estimation, in particular to a SAR image incident angle estimation method based on building target image features. Background technique

[0002] Synthetic Aperture Radar (SAR) is oblique-range side-view imaging, which transmits and receives backscattered echo energy from ground objects, and ground objects in different distances correspond to different incident angles. When the same type of surface object is under different incident angles, its backscattering characteristics are different, that is, the SAR image features are related to the radar incident angle. In the process of SAR image analysis, parameter inversion and information extraction, the incident angle is an indispensable radar imaging parameter. Therefore, estimation of incident angle of SAR image is an important link in SAR data processing. The existing radar image incidence angle estimation method mainly estimates ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More