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Method for applying software cache technology to geometric correction of SAR images

A geometric correction and software technology, applied in the field of SAR imaging, can solve the problems of low efficiency and achieve the effect of improving the efficiency of data interaction

Active Publication Date: 2018-05-15
北京理工雷科电子信息技术有限公司
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  • Abstract
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Problems solved by technology

[0005] In order to solve the problem of inefficiency when accessing external memory frequently and with a small amount of data in the geometric correction process, the present invention proposes a method for using software cache technology for geometric correction of SAR images

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  • Method for applying software cache technology to geometric correction of SAR images
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  • Method for applying software cache technology to geometric correction of SAR images

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Embodiment

[0049] The invention is designed to realize software cache under PC environment, and evaluate its efficiency. Table 1 describes the parameters of the test environment. The fast device in the table is the actual location of the software cache, and the slow device is the external memory, which is the storage location of the image before and after correction.

[0050] Table 1 Basic information of the test platform

[0051]

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Abstract

The invention discloses a method for applying a software cache technology to geometric correction of SAR images. The method specifically comprises the following steps of: in a processor memory, takingan idle area as a software cache area, and storing uncorrected SAR images in a plurality of blocks, wherein addresses of data stored in the blocks are continuous; determining a corresponding relationship between the uncorrected SAR images and each pixel of pre-given blank corrected images according to a geometric correction rule; and traversing the pixel points on the blank corrected images alongan inclined line in an antenna azimuth angle direction, extracting pixel values via a cache mechanism and filling the pixel values into the blank corrected images until the pixel points on all the blank uncorrected images are traversed. The method has the advantages of breaking through the bottleneck caused by low efficiency of accessing external memories by processors, and improving the data interaction efficiency.

Description

technical field [0001] The invention relates to a method for using software cache technology for SAR image geometry correction, belonging to the technical field of SAR imaging. Background technique [0002] Synthetic Aperture Radar (SAR) is a high-resolution imaging radar, which overcomes the shortcomings of optical imaging affected by weather and day and night, and has the ability to work all day and all weather. However, compared with the real geographic graphics, the SAR image generated after two-dimensional pulse pressure has certain geometric deformation. Geometric correction is the process of eliminating geometric deformation of SAR images, and finally obtains SAR images consistent with the real geographical environment. [0003] Geometry correction is a computation-intensive process, characterized by a large amount of computation and high frequency of memory access. Several existing literatures try to solve the efficiency problem of geometric correction from the per...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/10044G06T5/80
Inventor 刘峰高立宁刘腾飞
Owner 北京理工雷科电子信息技术有限公司
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