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Damaged building detection method

A detection method and construction technology, applied in the field of surveying and mapping remote sensing, can solve problems such as difficult to accurately and reliably detect, difficult to accurately detect, damaged buildings, etc., and achieve the effects of fast and reliable identification, fast and reliable detection, and high execution efficiency

Active Publication Date: 2014-09-17
MIN OF CIVIL AFFAIRS NAT DISASTER REDUCTION CENT
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Problems solved by technology

The planar feature extraction method that this type of method relies on makes it only effective for the detection of damaged buildings with flat roofs, but it is difficult to effectively detect damaged buildings with curved roofs
In addition, due to the complexity of the damaged building, there is a serious uncertainty in the size of the building plane, which makes it difficult to accurately detect the damaged building using the size threshold
Therefore, this type of method can reliably detect simple damaged buildings with flat roofs only by using the airborne laser point cloud of the damaged buildings, but it is difficult to accurately and reliably detect damaged buildings with complex structures including curved roofs

Method used

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Embodiment Construction

[0019] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0020] figure 1 Flowchart of the damaged building detection method according to the present invention. Such as figure 1 As shown, the detection method provided by the present invention includes: at step 101, generating the contour line of the building based on the laser point cloud of the building; at step 102, performing contour classification on the contour line cluster to obtain contour clusters; at step 103, calculate the normalized information entropy of the contour shape similarity of said contour clusters; at step 104, according to the contour of said contour clusters The normalized information entropy of the shape similarity calculates the classificat...

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Abstract

The invention discloses a damaged building detection method. The detection method includes the steps that based on a laser point cloud of a building, the contour lines of the building are generated; the contour lines are clustered, so that contour line clusters are obtained; normalization information entropy of the contour line shape similarity of the contour line clusters is calculated; according to the normalization information entropy of the contour line shape similarity of the contour line clusters, a classification threshold value is calculated, and a damage index of the contour line clusters is calculated according to the classification threshold value; according to the damage index, whether the building is damaged or not is judged. Through the detection method, the damaged building with a complex structure can be accurately detected.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping remote sensing, in particular to a damaged building detection method. Background technique [0002] Laser scanning technology (for example, airborne laser scanning technology) is a new type of active remote sensing technology for high-precision and fast acquisition of three-dimensional geometric data of objects. It has the following unique advantages in the field of damaged building detection: Quickly collect building information day and night; secondly, the multi-echo feature enables it to penetrate vegetation and collect building information in blocked areas; thirdly, use the rich 3D information collected on the building surface to quickly extract rich 3D damage information of the building , and used to detect a variety of building damage types. Therefore, using airborne laser point cloud to quickly and accurately detect damaged buildings has become a technology with great develop...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 范一大林月冠王薇杜志强何美章
Owner MIN OF CIVIL AFFAIRS NAT DISASTER REDUCTION CENT
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