SAR image river channel extracting method based on minimum circumscribed rectangle window river channel segmentation model

A technology of circumscribed rectangle and segmented model, applied in the field of computer vision, can solve the problems of cumbersome post-processing and unsatisfactory processing results, and achieve the effect of strong anti-background noise ability, high integrity and reduced complexity

Active Publication Date: 2014-04-30
HOHAI UNIV
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Problems solved by technology

Usually the results of threshold segmentation need to go through cumbersome post-processing, and the processing results are not very ideal.

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  • SAR image river channel extracting method based on minimum circumscribed rectangle window river channel segmentation model
  • SAR image river channel extracting method based on minimum circumscribed rectangle window river channel segmentation model
  • SAR image river channel extracting method based on minimum circumscribed rectangle window river channel segmentation model

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Embodiment Construction

[0018] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0019] Such as figure 1 As shown, the SAR image channel extraction method based on the minimum circumscribed rectangular window channel segmentation model preprocesses the SAR image based on the gray histogram. , realize a graph theory-based image segmentation that is more conducive to river extraction, and then use the connectivity between rectangular windows and the aspect ratio characteristics of rectangular windows to realize the recognition of river regions. Finally, splicing the identified ...

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Abstract

The invention discloses an SAR image river channel extracting method based on a minimum circumscribed rectangle window river channel segmentation model. The method comprises the steps that firstly, a histogram equalization method is adopted in an original SAR image to stretch the gray scale contrast ratio; then, a river channel is separated into scattered and even linear stripe-shaped areas, a minimum circumscribed rectangle window is adopted to tightly wrap each segmentation area of the river channel, and approximation of a complex river channel outline type is achieved through the rectangle windows. Threshold functions which are generated by converting a river channel model and used for judging zone boundary confidence coefficients in a graph model are used for optimizing the segmentation result so as to enable the segmentation result to be more suitable for river channel extracting tasks on this basis. Finally, according to the prior experience of the river channel outline, according to the river channel area identification method, the length-width ratio of the rectangle windows is considered, the communication between the rectangle windows is also considered, and the effective identification on the river channel area is achieved. The method can be stably and reliably used for extracting an SAR image river channel, and is particularly suitable for river channel extracting under the complex background or the extremely complex river channel outline.

Description

technical field [0001] The invention relates to a segmentation and recognition method for SAR images, in particular to a method for extracting river channels from SAR images based on a minimum circumscribed rectangular window channel segmentation model, and belongs to the technical field of computer vision. Background technique [0002] With the needs of various routine and emergency monitoring, such as weather forecasting, flood monitoring, etc., more and more high-performance synthetic aperture radars (Synthetic Aperture Rader, SAR) are loaded on various carriers, providing users with rich data And high-quality observation data, as the basis for various later research and judgment. Compared with other types of imaging sensors, the technical advantage of SAR imaging sensors lies in their ability to observe the earth all day and all day and have certain penetration capabilities. At present, with the rapid development of SAR imaging equipment technology, high-resolution SAR ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06K9/34
Inventor 朱贺李臣明高红民张丽丽
Owner HOHAI UNIV
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