Segmentation Method of Polarization Synthetic Aperture Radar Image Based on Two-Stage Region Merging Strategy

An aperture radar and image segmentation technology, applied in image analysis, image data processing, instruments, etc., can solve the problems of complex expressions and parameter estimation, low segmentation processing efficiency, etc.

Active Publication Date: 2019-10-11
NAT UNIV OF DEFENSE TECH
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  • Application Information

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Problems solved by technology

The KummerU distribution can better distinguish regions with different textures, but the expression and parameter estimation of the KummerU statistical distribution are very complicated, resulting in low efficiency of the entire segmentation process.

Method used

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  • Segmentation Method of Polarization Synthetic Aperture Radar Image Based on Two-Stage Region Merging Strategy
  • Segmentation Method of Polarization Synthetic Aperture Radar Image Based on Two-Stage Region Merging Strategy
  • Segmentation Method of Polarization Synthetic Aperture Radar Image Based on Two-Stage Region Merging Strategy

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Embodiment Construction

[0089] The present invention will be explained and illustrated in detail below in conjunction with the accompanying drawings.

[0090] figure 1 It is an overall flowchart of the present invention, and the present invention comprises the following steps:

[0091] Step 1: Perform superpixel segmentation on the PolSAR image by:

[0092] Use the PolSAR image superpixel segmentation method to perform superpixel segmentation on the original PolSAR image, and obtain the superpixel set V={v 1 ,v 2 ,...,v i,...,v j ,...,v N}, where N is the number of superpixels, v i Indicates the i-th superpixel, 1≤i≤N, 1≤j≤N. Use the region adjacency graph G=(V,A) to represent the relationship between the superpixel set V and the elements in the set, where A is the set of adjacent relations between superpixels, a ij ∈A denotes a superpixel v i and v j Geometrically adjacent, let N a Indicates the number of elements in A, N a is a positive integer, use b ij to represent adjacent superpixe...

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Abstract

The invention discloses a polarimetric synthetic aperture radar image segmentation method based on a two-stage region merging strategy, which aims at improving the segmentation accuracy of a non-uniform region, avoiding excessive complex operation and improving calculation efficiency. The technical scheme is that the PolSAR image is segmented into super pixels, and then Wishart merging and KummerUmerging are carried out in turn. The Wishart merging phase merges the original superpixels which clearly come from the same object quickly, and the KummerU merging phase merges the remaining regionsiteratively to obtain the final segmentation results. The method can improve the accuracy and computational efficiency of the merging, and combines the KummerU energy loss, the edge penalty function value and the homogeneity penalty factor to obtain a new measurement standard, which can further improve the segmentation accuracy.

Description

technical field [0001] The invention belongs to the field of radar image processing, and relates to a polarimetric synthetic aperture radar (Polarimetric Synthetic Aperture Radar, referred to as PolSAR) image segmentation method, in particular to a PolSAR image segmentation method using a region merging framework. Background technique [0002] PolSAR is an advanced remote sensing observation system that can obtain richer and more comprehensive ground objects and target scattering information than single-polarization SAR, and has been widely used in national economic construction and national defense and military fields. In PolSAR image interpretation, in many cases, it is necessary to first segment the image into local homogeneous regions, and then process based on these regions (also called objects), which is helpful for improving the efficiency of subsequent processing, reducing the influence of coherent speckle noise, and obtaining uniform and stable The results are of gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/11G06T7/187
Inventor 王威占荣辉胡杰民欧建平张军
Owner NAT UNIV OF DEFENSE TECH
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