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Method for detecting urban region change based on multi-temporal SAR (synthetic aperture radar) images

A change detection, urban area technology, applied in the field of electronic science, can solve problems such as unsuitability

Inactive Publication Date: 2011-09-07
XIAN UNIV OF TECH
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Problems solved by technology

[0009] The purpose of the present invention is to provide a multi-temporal SAR image urban area change detection method, which solves the problem that the existing detection method is not suitable for the change detection of urban areas with complex structures.

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  • Method for detecting urban region change based on multi-temporal SAR (synthetic aperture radar) images
  • Method for detecting urban region change based on multi-temporal SAR (synthetic aperture radar) images
  • Method for detecting urban region change based on multi-temporal SAR (synthetic aperture radar) images

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Embodiment Construction

[0045] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] The multi-temporal SAR image urban area change detection method of the present invention adopts the processing idea of ​​"comparing first and then classifying" to complete the change detection task of multi-temporal SAR images, and uses multi-scale Shearlet transform to respectively perform SAR images acquired at different time periods. Multi-scale decomposition, and then obtain the difference map of the corresponding sub-band through the difference operation, and perform statistical classification on the difference map of each sub-band according to the idea of ​​Bayesian classification, obtain the multi-scale change detection map, and then use the idea of ​​fusion within the scale to analyze The change maps of all sub-bands in each scale are fused, and finally the change map fusion between scales is implemented to achieve the entire ch...

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Abstract

The invention discloses a method for detecting the urban region change based on multi-temporal SAR (synthetic aperture radar) images. The method comprises the following steps: firstly, collecting two multi-temporal SAR images of the same region at different periods, and correcting the SAR images by geometric correction and radiometric correction; and secondarily, processing the two corrected multi-temporal SAR images of the same region at different periods to obtain the change detection result. The detection method is simple, practical, and easy to realize, and is proposed special for the application of urban remote sensing images. The method has the unique advantage on image representation when being used for detecting the time-space change of urban regions with complex structural characteristics.

Description

technical field [0001] The invention belongs to the field of electronic science and technology, and in particular relates to a method for detecting changes in urban areas in multi-temporal SAR images. Background technique [0002] Change detection is a process of determining changes in the distribution of ground objects by analyzing images obtained at different times. In both civilian and military fields, change detection has important research significance. For example, through the monitoring of farmland, the growth status of crops can be analyzed; through the survey of urban development land, the development of urbanization can be evaluated. In terms of military applications, change detection technology can be used to estimate the battlefield situation and help to change strategic deployment in a timely manner. [0003] With the development of SAR imaging technology (especially spaceborne SAR imaging technology) and computer technology, it is becoming more and more conve...

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Application Information

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IPC IPC(8): G01S13/90G06T7/00G06T5/50G06T7/168
Inventor 孙强
Owner XIAN UNIV OF TECH
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