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Three-dimensional temperature field image mapping method

A technology of three-dimensional temperature and mapping method, applied in the field of heat map mapping, can solve the problems of unsmooth temperature field connection, prone to error coping relationship, and insufficient continuous mapping relationship, and achieve the effect of reducing mapping errors

Pending Publication Date: 2022-05-17
中国空气动力研究与发展中心设备设计与测试技术研究所
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Problems solved by technology

[0004] The invention provides a mapping method of a three-dimensional temperature field image to solve the problems in the prior art that the mapping relationship is not continuous enough, the connection of the temperature field is not smooth, and the wrong response relationship is prone to occur, so as to make the mapped temperature field more continuous and improve considerably. The purpose of improving the accuracy of mapping

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Embodiment

[0075] A mapping method for a three-dimensional temperature field image, such as figure 1 shown, including the following steps:

[0076] (1) Sampling temperature field images under different viewing angles;

[0077] (2) According to the total number of sampled temperature field images, the surface of the three-dimensional digital model is divided into several small area surfaces, and each small area surface corresponds to a temperature field image under a viewing angle;

[0078] Assign a temperature field image to each small area surface of the 3D digital model;

[0079] To verify the temperature field image assigned to the surface of the small area of ​​the 3D digital model, the verification methods include:

[0080] Specify the temperature field image, and determine that the division angle of the surface of the small area corresponding to the temperature field image is 2β;

[0081] Taking the direction of the plane normal vector of the temperature field image as the cente...

Embodiment 2

[0112] A method for mapping a three-dimensional temperature field image. In this embodiment, the temperature field distribution is represented by an image (heat map / cloud image), so the temperature field mapping is essentially a texture mapping problem.

[0113] The existing data in this embodiment include the 3D digital model of the object composed of grids, the texture images with temperature field distribution information under different viewing angles, and the camera pose matrix (calibration data) corresponding to each viewing angle. The mapping method is as follows:

[0114] Using texture images from different perspectives and digital digital surface models of three-dimensional objects as input, find the texture images corresponding to each grid in the digital surface model;

[0115] Calculate the texture coordinates corresponding to the grid from the imaging projection relationship in the calibration result;

[0116] By writing the texture coordinates corresponding to t...

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Abstract

The invention discloses a three-dimensional temperature field image mapping method. The method comprises the following steps: sampling temperature field images at different visual angles; according to the total number of the sampled temperature field images, the surface of the three-dimensional digital model is divided into a plurality of small area surfaces, and each small area surface corresponds to the temperature field image under one view angle; a temperature field image is distributed to each side face of the three-dimensional digital model; and establishing a mapping relationship between each grid on each side surface and the corresponding temperature field image, and mapping the temperature field image to the surface of the three-dimensional digital model. The invention provides a mapping method of a three-dimensional temperature field image so as to solve the problems that in the prior art, mapping relations are not continuous enough, temperature field connection is not smooth, and error response relations are prone to occurring, and the purposes that the mapped temperature fields are more continuous, observability is improved, and mapping accuracy is improved are achieved.

Description

technical field [0001] The invention relates to the field of heat map mapping, in particular to a mapping method of a three-dimensional temperature field image. Background technique [0002] According to the 3D digital surface model of the target and the 2D temperature field distribution image, the thermal map mapping of the 3D model can be carried out, that is, the temperature distribution image is pasted on the digital surface model. This process is called temperature field mapping, which combines the temperature distribution information with the 3D digital The model surface model establishes the mapping relationship. [0003] The premise of establishing the mapping relationship between each grid of the three-dimensional object and the temperature field image is to find its corresponding temperature field image first. In the prior art, the temperature field mapping algorithm generally takes each grid as a unit to find a temperature field image that is approximately perpen...

Claims

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Application Information

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IPC IPC(8): G06T17/20G06T19/20G06T15/04G06T7/13G06T7/10G06T5/00
CPCG06T17/20G06T19/20G06T7/10G06T7/13G06T15/04G06T5/90
Inventor 王斌王强张文清谭志国唐浩龙学军
Owner 中国空气动力研究与发展中心设备设计与测试技术研究所
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