Multi-target forehead temperature measuring method capable of accurately positioning forehead

A technology of precise positioning and measurement method, applied in the field of multi-target forehead temperature measurement, which can solve problems such as the decrease of the accuracy of temperature measurement equipment and the influence of temperature measurement

Pending Publication Date: 2021-01-19
希望银蕨智能科技有限公司
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AI Technical Summary

Problems solved by technology

The face detection frame introduces more interference information (background, hair, brim, etc.), especially in hot summer weather, the interference information will have a great impact on temperature measurement, which will lead to a decrease in the accuracy of temperature measurement equipment

Method used

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  • Multi-target forehead temperature measuring method capable of accurately positioning forehead
  • Multi-target forehead temperature measuring method capable of accurately positioning forehead
  • Multi-target forehead temperature measuring method capable of accurately positioning forehead

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Embodiment Construction

[0025]The overall implementation process of the present invention is as followsFigure 4 .

[0026]In the following, the present invention will be further clarified with reference to the figures and specific examples. It should be understood that these examples are only used to describe the present invention and not to limit the scope of the present invention. After reading the present invention, those skilled in the art will give various equivalent forms of the present invention. All the modifications fall within the scope of the appended claims of this application.

[0027]Preparation: Find the perspective transformation matrix of the visible light image and the infrared thermal image in the registered dual-light camera, the steps are as follows.

[0028](1) Prepare a whiteboard and four colored button magnets whose temperature is significantly higher than the ambient temperature after heating; disperse the four magnets on the four corners of the whiteboard, place the whiteboard in the fiel...

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Abstract

The invention discloses a multi-target forehead temperature measurement method capable of accurately positioning a forehead, and the method comprises the steps: obtaining a detectable visible light image face through the training of a feedback type neural network, and extracting a model of the coordinates of a key point at the lower edge of the forehead of the face; positioning a human face forehead area by utilizing the human face detection frame and forehead lower edge key point coordinates; judging whether the forehead is completely shielded or not in a human face forehead region by utilizing an image adaptive binarization theory, and selecting an effective temperature measurement region; and mapping the effective temperature measurement area of the visible light image to the infrared thermal image, and performing infrared data analysis on the effective temperature measurement area to obtain a temperature measurement result of the current face.

Description

Technical field[0001]The invention relates to a multi-target forehead temperature measurement method for precise positioning of the forehead.Background technique[0002]During the epidemic period, the entrance of many public places (such as hospitals, schools, stations, airports, etc.) requires body temperature measurement. A convenient and high-precision temperature measurement device is essential.[0003]With the development of machine vision technology, non-contact temperature measurement methods based on dual-lens cameras (a combination of infrared cameras and visible light cameras) have been widely studied and applied. The mainstream temperature measurement method combined with dual-light cameras is to perform visual face detection on the visible light image, and then map the face area of ​​the visible light image to the infrared thermal image to obtain the infrared data of the face area-the face temperature measurement area, and finally The temperature measurement result of the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06N3/04G01J5/00
CPCG01J5/0025G01J2005/0077G06V40/165G06V40/171G06N3/045
Inventor 刘杰张澍黄奇史丽卿立磊张智群陶黎
Owner 希望银蕨智能科技有限公司
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