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Geological disaster photography monitoring and early warning method

A technology for monitoring and early warning and geological disasters, which is applied in the fields of alarms, image data processing, television, etc., can solve the problems of many manual interventions, poor real-time performance and high cost, and achieve the effects of improving monitoring accuracy, convenient operation and low installation cost.

Inactive Publication Date: 2022-02-18
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods are effective, they all have problems such as high cost, manual intervention, poor real-time performance, and long cycle time.

Method used

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  • Geological disaster photography monitoring and early warning method
  • Geological disaster photography monitoring and early warning method
  • Geological disaster photography monitoring and early warning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: See Figure 1 to Figure 3, a method for geological disaster photography monitoring and early warning of the present embodiment, comprising the following steps: S1: Aiming at clearly obtaining each target image, determining each target according to the distance from the video camera, the maximum displacement and the magnification of the video camera Size; S2: Use video cameras to collect real-time images of each target of multiple survey lines and multiple survey points of the monitored landslide; based on the collected video images, use the panoramic calibration field to distort the lens camera with high precision Difference correction, wavelet transform to filter out noise interference, and then restore the image through image reconstruction; S3: transmit the restored image data to the computer server, and the computer server performs real-time calculation of the vertical displacement of each target and the displacement of the landslide direction; S4: The co...

Embodiment 2

[0039] Embodiment 2: In step S2 of this embodiment, the process of using the panoramic calibration field to perform high-precision distortion correction on the lens specifically includes: S21: Adjust the focal length to the farthest, the closest and the middle, and respectively check and correct three groups of distortions parameters; S22: Take at least 20 groups of photos on each focal length, and calculate the distortion parameters on the corresponding focal lengths from these 20 groups of photos; S23: Solve the distortion of different positions in the field through high-order polynomials, and perform the second One-step primary distortion correction; S24: On the basis of the first primary distortion correction, perform high-precision feature recognition on sequence images, and use wavelet changes to decompose images and filter out the influence of various noise interference factors on image recognition, The image is then recovered by image reconstruction.

Embodiment 3

[0040] Embodiment 3: The relative position of the video camera of this embodiment is used to calibrate each other. The specific process includes: setting the focal length of the video camera lens to be different, the focal length is long, and the farthest target is enlarged and clearer; the focal length is short and the field of view is wider. The target of each measuring point of each measuring line can be covered; when the video camera is aimed at the target of the monitored slope and landslide, since the same target is shot at different focal lengths, the slight changes inside the camera are reflected on the imaging through cameras with different focal lengths , which is reflected by different pixel positions; and then calculate the relative change of the camera through the calibrated distortion parameters, optical collinear equation and focal length resolution, and then correct the imaging error caused by the slight structural change of the main camera.

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Abstract

The invention discloses a geological disaster photography monitoring and early warning method which comprises the following steps: S1, determining the size of each target according to the distance between the target and a video camera, the maximum displacement value and the magnification times of the video camera by taking each target image which can be clearly acquired as a target; s2, performing real-time image acquisition on each target of a plurality of measuring lines and a plurality of measuring points of the monitored landslide mass by adopting a video camera; based on the collected video image, carrying out high-precision distortion correction on the lens camera by using a panoramic calibration field, filtering noise interference by wavelet transform, and then recovering the image through image reconstruction; s3, transmitting the recovered image data to a computer server so that the computer server calculates the vertical displacement of each target and the displacement in the landslide direction in real time; s4, the computer server outputs a calculation result in a chart or a format specified by a user; and S5, when the computer server detects that the threshold value is exceeded, immediately performing sound-light early warning.

Description

technical field [0001] The invention relates to the technical field of geological disaster monitoring, in particular to a displacement deformation photography monitoring and early warning method for collapses, landslides, ground subsidence and ground subsidence. Background technique [0002] China is one of the countries with the most serious geological disasters and the most threatened population in the world. Collapses, landslides, mudslides, ground subsidence, ground fissures, ground subsidence and other disasters have many hidden dangers, are widely distributed, and are difficult to prevent. In particular, slope rock and soil, due to internal conditions such as geological environment and historical deformation, induced by earthquakes or human activities, rainfall or irrigation promotes continuous deformation of landslides. Under the action of self-gravity, local structures are destroyed and gradually lose support. Sliding in one or more directions, causing a landslide or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B21/10H04N5/357G06T5/00
CPCG08B21/10G06T2207/10016H04N25/60G06T5/00
Inventor 李孝文杨兴国李永荣
Owner SICHUAN UNIV