Hand-held double-camera building temperature field three-dimensional model construction method and system

A technology of 3D model and construction method, applied in 3D modeling, image analysis, image enhancement, etc., can solve the problems of building thermal anomalies, unsuitable excessive smoothing, difficult to apply, etc., and achieve the effect of reducing costs

Pending Publication Date: 2022-05-24
中国人民解放军战略支援部队航天工程大学士官学校
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Problems solved by technology

However, in the texture mapping of thermal infrared image sequences, the stitching seam corresponds to the thermal anomaly of the building, which is not suitable for excessive smoothing

Method used

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  • Hand-held double-camera building temperature field three-dimensional model construction method and system
  • Hand-held double-camera building temperature field three-dimensional model construction method and system
  • Hand-held double-camera building temperature field three-dimensional model construction method and system

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Embodiment 1

[0029] figure 1 It is a method for constructing a three-dimensional temperature field of a building based on a handheld dual camera in an embodiment of the present invention, such as figure 1 shown, including:

[0030] S1 acquires visible light image sequence and thermal infrared image sequence.

[0031] In this embodiment, the handheld dual-camera system includes a fixed visible light camera and a thermal infrared camera. In the process of shooting building facades, the handheld dual-camera system generates a thermal infrared image sequence and a visible light image sequence with a high degree of overlap through horizontal translation and vertical pitching, and the two cameras are simultaneously imaging at any moment. The imaging system in this embodiment can also implement imaging in other mobile ways, such as being placed on a drone or an airplane. The visible light image sequence is used to construct a fine 3D model of the building facade, and the thermal infrared image...

Embodiment 2

[0078] Based on the same inventive concept, this embodiment discloses a three-dimensional model reconstruction system for building temperature field based on handheld dual cameras, including:

[0079] An image acquisition module, configured to acquire visible light image sequences and thermal infrared image sequences;

[0080] The visible light image point cloud generation module is used to form a visible light image point cloud model according to the visible light image sequence;

[0081] The thermal infrared-visible light image pair matching module is used to match the visible light image point cloud model with the thermal infrared image sequence;

[0082] The relative pose calculation module is used to calculate the relative pose of the thermal infrared image sequence relative to the visible light image point cloud model according to the matching result of the visible light-thermal infrared image pair;

[0083] The temperature field texture mapping module is used to remove...

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Abstract

The invention belongs to the technical field of thermal infrared image photogrammetry, and relates to a handheld double-camera temperature field three-dimensional model construction method and system without auxiliary positioning data, and the method comprises the steps: obtaining a visible light image sequence and a thermal infrared image sequence; generating a visible light image three-dimensional point cloud according to the visible light image sequence; performing feature extraction and accurate matching on the visible light-thermal infrared image pair; calculating an exterior orientation element of the thermal infrared image sequence relative to the visible light image point cloud; using a visibility test method based on a distance buffer area to remove shielded error textures, and determining a candidate visual texture feature set; and the optimal selection of thermal infrared image textures is realized by taking the minimum overlapping image temperature difference as a target, and the reconstruction of a temperature field three-dimensional model is completed. According to the invention, the radiation temperature difference between the overlapped images is reduced, and high-precision building facade temperature field three-dimensional reconstruction can be realized.

Description

technical field [0001] The invention relates to a method and system for constructing a three-dimensional model of a building temperature field with a handheld dual camera, and belongs to the technical field of thermal infrared photogrammetry. Background technique [0002] Buildings are a major contributor to energy consumption in order to maintain the building's indoor temperature within a comfortable range for humans. Building-related energy consumption accounts for approximately 36% of total global energy consumption, and carbon dioxide emissions account for 39% of total global emissions. In order to improve the effective energy utilization rate of buildings, reducing the heat loss caused by the aging and damage of building components has become the key. Thermal infrared cameras have the ability to capture and visualize heat loss in buildings. Therefore, using thermal infrared image sequences to construct the three-dimensional temperature field of buildings and realize th...

Claims

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Application Information

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IPC IPC(8): G06T17/05G06T7/38G06T15/04
CPCG06T17/05G06T7/38G06T15/04G06T2207/10028G06T2207/10032G06T2207/10048
Inventor 林栋张秀媛杨保平崔晓杰宋崧娄艺蓝姜晶莉赵东杰潘国平
Owner 中国人民解放军战略支援部队航天工程大学士官学校
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