CN112067139A - Thermal imaging temperature measuring device and thermal imaging temperature measuring method - Google Patents
Thermal imaging temperature measuring device and thermal imaging temperature measuring method Download PDFInfo
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- 238000001931 thermography Methods 0.000 title claims abstract description 111
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- 230000036760 body temperature Effects 0.000 claims abstract description 43
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- 210000001061 forehead Anatomy 0.000 claims description 27
- 238000009529 body temperature measurement Methods 0.000 claims description 14
- 238000004861 thermometry Methods 0.000 claims description 11
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- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
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- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The embodiment of the application relates to a thermal imaging temperature measuring device and a thermal imaging temperature measuring method. The thermal imaging temperature measuring device comprises a thermal imaging sensor and a controller, wherein the controller is connected with the thermal imaging sensor; the controller is used for selecting a plurality of pixel points from the first infrared thermal image shot by the thermal imaging sensor according to a preset rule and acquiring the average temperature of the pixel points as the ambient temperature; the controller is further configured to identify a body temperature from a second infrared thermal image captured by the thermal imaging sensor, and to modify the body temperature based on the ambient temperature. The thermal imaging temperature measuring device of the embodiment of the application does not need to additionally increase a temperature sensor to detect the ambient temperature, the calculated ambient temperature gets rid of the interference of external factors, and the thermal imaging temperature measuring device is not affected by the heating of the thermal imaging temperature measuring device, so that the measurement of the ambient temperature is more accurate, and the detection of the human body temperature is more accurate.
Description
Technical Field
The embodiment of the application relates to the technical field of thermal imaging temperature measurement, in particular to a thermal imaging temperature measurement device and a thermal imaging temperature measurement method.
Background
All objects in nature, whether arctic glaciers, flames, human bodies, or even extremely cold deep space in the universe, will have infrared radiation as long as their temperature is above absolute zero-273 ℃, as a result of thermal movement of molecules within the object. The radiation energy is proportional to the fourth power of the temperature, and the radiated wavelength is inversely proportional to the temperature. The infrared thermal imaging technology is based on the detected radiation energy of the object. The thermal image of the target object is converted by the system processing and displayed in gray scale or pseudo color, and the temperature distribution of the measured target is obtained, so that the state of the object is judged. Therefore, the detection of the level of heat emitted by an object is an inherent gene of infrared thermal imaging technology.
The thermal imaging temperature measuring device is detection equipment which detects infrared energy (heat) through non-contact and converts the infrared energy (heat) into an electric signal so as to generate a thermal image and a temperature value on a display and calculate the temperature value.
The surface of a human body is always in contact with the environment, so the surface temperature of the human body is also influenced by environmental factors, and according to the test, the lower the environmental temperature is, the lower the surface temperature of the human body is, the lower the body temperature of a human with the body temperature of 36.5 is in the environment of 15-35 ℃.
In order to eliminate the influence of the ambient temperature on the accuracy of thermal imaging temperature measurement, the traditional thermal imaging temperature measurement device needs to detect the ambient temperature when measuring the temperature, so that the detected human body temperature is corrected according to the detected ambient temperature when calculating the human body temperature. However, a temperature sensor needs to be added for detecting the ambient temperature, an IO interface needs to be added to a controller of the thermal imaging temperature measuring device, the size and the cost of the thermal imaging temperature measuring device are increased, and the thermal imaging temperature measuring device can generate heat during working, so that the accuracy of the ambient temperature detected by the temperature sensor is affected.
Disclosure of Invention
The embodiment of the application provides a thermal imaging temperature measuring device and a thermal imaging temperature measuring method, and the ambient temperature is detected without additionally increasing a temperature sensor, the calculated ambient temperature is interfered by external factors, the influence of heating of the thermal imaging temperature measuring device is avoided, the measurement of the ambient temperature is more accurate, and the detection of the human body temperature is more accurate.
In a first aspect, an embodiment of the present application provides a thermal imaging temperature measurement apparatus, including a thermal imaging sensor and a controller, where the controller is connected to the thermal imaging sensor;
the controller is used for selecting a plurality of pixel points from the first infrared thermal image shot by the thermal imaging sensor according to a preset rule and acquiring the average temperature of the pixel points as the ambient temperature;
the controller is further configured to identify a body temperature from a second infrared thermal image captured by the thermal imaging sensor, and to modify the body temperature based on the ambient temperature.
Optionally, according to a preset rule, selecting a plurality of pixel points from a first infrared thermal image captured by the thermal imaging sensor specifically includes:
and removing N pixel points with the lowest temperature from M pixel points with lower temperature, and selecting a plurality of pixel points from the rest pixel points, wherein M is larger than N.
Optionally, the system further comprises a camera, and the camera is connected with the controller;
according to a preset rule, selecting a plurality of pixel points from a first infrared thermal image shot by the thermal imaging sensor, specifically:
according to a preset rule, selecting a plurality of pixel points from a first infrared thermal image shot by the thermal imaging sensor, specifically:
identifying a first face image from a first monitoring image shot by the camera through a face identification algorithm, and acquiring a coordinate of the first face image in the first monitoring image, wherein the first monitoring image is matched with the first infrared thermal image;
converting coordinates of the first facial image in the first monitored image to coordinates in the first infrared thermal image according to the resolution of the first monitored image and the resolution of the first infrared thermal image;
and removing pixel points corresponding to the coordinates of the first face image in the first infrared thermal image, and selecting a plurality of pixel points from the rest pixel points.
Optionally, the controller is further configured to:
identifying a second face image from a second monitoring image shot by the camera through a face identification algorithm, and acquiring a coordinate of the second face image in the second monitoring image, wherein the second monitoring image is matched with the second infrared thermal image;
and calculating the size of the second face image according to the coordinate of the second face image in the second monitoring image, determining the distance between the thermal imaging sensor and the human body according to the size of the second face image, and correcting the temperature of the human body according to the distance.
Optionally, the controller is further configured to:
the controller is further configured to:
identifying the coordinates of the forehead from a second face image identified from the second monitoring image, and converting the coordinates of the forehead in the second monitoring image into the coordinates in the second infrared thermal image according to the resolution of the second monitoring image and the resolution of the second infrared thermal image;
and acquiring the average temperature of pixels corresponding to the coordinates of the forehead in the second infrared thermal image as the human body temperature identified from the second infrared thermal image.
In a second aspect, an embodiment of the present application provides a thermal imaging thermometry method, including the following steps:
selecting a plurality of pixel points from a first infrared thermal image shot by a thermal imaging sensor according to a preset rule, and acquiring the average temperature of the pixel points as the ambient temperature;
identifying a body temperature from a second infrared thermal image taken by the thermal imaging sensor;
and correcting the human body temperature according to the environment temperature.
Optionally, according to a preset rule, selecting a plurality of pixel points from a first infrared thermal image captured by the thermal imaging sensor includes:
and removing N pixel points with the lowest temperature from M pixel points with lower temperature, and selecting a plurality of pixel points from the rest pixel points, wherein M is larger than N.
Optionally, according to a preset rule, selecting a plurality of pixel points from a first infrared thermal image captured by the thermal imaging sensor includes:
identifying a face image from a first monitoring image shot by a camera through a face identification algorithm, and acquiring coordinates of the face image in the first monitoring image, wherein the first monitoring image is matched with the first infrared thermal image;
converting the coordinates of the face image in the first monitoring image into coordinates in the first infrared thermal image according to the resolution of the first monitoring image and the resolution of the first infrared thermal image;
and removing pixel points corresponding to the coordinates of the face image in the first infrared thermal image, and selecting a plurality of pixel points from the rest pixel points.
Optionally, the method further includes:
identifying a second face image from a second monitoring image shot by the camera through a face identification algorithm, and acquiring the coordinates of the face image in the second monitoring image, wherein the second monitoring image is matched with the second infrared thermal image;
calculating the size of the face image according to the coordinates of the face image in the second monitoring image;
determining the distance between the thermal imaging sensor and the human body according to the size of the human face image;
and correcting the human body temperature according to the distance.
Optionally, the method further includes:
identifying the coordinates of the forehead from the face image identified from the second monitoring image;
converting the coordinates of the forehead in the second monitoring image into coordinates in the second infrared thermal image according to the resolution of the second monitoring image and the resolution of the second infrared thermal image;
and acquiring the average temperature of pixels corresponding to the coordinates of the forehead in the second infrared thermal image as the human body temperature identified from the second infrared thermal image.
In the embodiment of the application, after the controller of the thermal imaging temperature measuring device acquires the first infrared thermal image from the thermal imaging sensor, a plurality of pixel points which are removed from external interference and can reflect the ambient temperature are selected from the first infrared thermal image according to a preset rule, the average value of the corresponding temperatures of the plurality of pixel points is calculated to serve as the ambient temperature, and the human body temperature identified from the infrared thermal image is corrected through the ambient temperature. The thermal imaging temperature measuring device of the embodiment of the application does not need to additionally increase a temperature sensor to detect the ambient temperature, the calculated ambient temperature gets rid of the interference of external factors, and the thermal imaging temperature measuring device is not affected by the heating of the thermal imaging temperature measuring device, so that the measurement of the ambient temperature is more accurate, and the detection of the human body temperature is more accurate.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Drawings
FIG. 1 is a schematic diagram of a thermographic thermometry apparatus provided in one exemplary embodiment;
FIG. 2 is a schematic diagram of a thermographic thermometry apparatus provided in one exemplary embodiment;
FIG. 3 is a flow chart of a method of thermographic thermometry provided in an exemplary embodiment;
FIG. 4 is a flow chart of selecting a number of pixel points from a first infrared thermal image taken by the thermal imaging sensor provided in an exemplary embodiment;
FIG. 5 is a flow chart of acquiring a distance between a thermal imaging sensor and a human body provided in an exemplary embodiment;
FIG. 6 is a flow chart of identifying a temperature of a human body from an infrared thermal image provided in an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
To solve the technical problem mentioned in the background art, the embodiment of the present application provides a thermal imaging temperature measurement device, which extracts the temperature of the environment in the infrared thermal image captured by the thermal imaging sensor, thereby obtaining a more accurate environment temperature without adding a temperature sensor dedicated for detecting the environment temperature.
In this embodiment, the thermal imaging temperature measuring device may be a dedicated temperature measuring instrument, and in other examples, the thermal imaging temperature measuring device may also be another instrument having a thermal imaging temperature measuring function, for example, an attendance checking device having a thermal imaging temperature measuring function, and the like.
Fig. 1 is a schematic structural diagram of a thermographic thermometry apparatus shown in an exemplary embodiment, in fig. 1, the thermographic thermometry apparatus includes a thermographic sensor 1 and a controller 2, and the controller 2 is connected to the thermographic sensor 1. The thermal imaging sensor 1 is configured to capture an infrared thermal image and transmit the captured infrared thermal image to the controller 2.
In some examples, as shown in fig. 1, the thermal imaging temperature measuring apparatus further includes a display screen 3, the display screen 3 is connected to the controller 2 and is configured to display a thermal imaging image captured by the thermal imaging sensor 1, and in some examples, after the human body temperature is detected, the display screen 3 further displays the detected human body temperature in the displayed thermal imaging image.
The thermal imaging sensor 1 is a device that converts an image of the temperature distribution of a subject into a visible image by detecting infrared radiation of the subject, and applying signal processing, photoelectric conversion, and the like, using an infrared thermal imaging technique. In one example, the thermal imaging sensor is an MXL90640 sensor.
The controller 2 may be an FPGA chip or an integrated circuit formed by a plurality of transistors, and includes a configurable logic module, an input module, and an output module inside. The controller 2 is configured to select a plurality of pixel points from the first infrared thermal image captured by the thermal imaging sensor according to a preset rule, and acquire an average temperature of the plurality of pixel points as an ambient temperature.
The preset rule is a selection rule preset in the controller 2, and when the thermal imaging sensor 1 takes an infrared thermal image, the field of view may not include a background environment, and a high temperature source such as a human body or an animal, or other low temperature sources may occur, so that the non-background environments such as the high temperature source and the low temperature source in the field of view of the thermal imaging sensor 1 need to be identified, and the ambient temperature is accurately measured.
The preset rule may have various forms, for example, the preset rule may be a rule in which the temperatures corresponding to all the pixels in the first infrared thermal image are compared and analyzed, an average value of the temperatures corresponding to all the pixels is selected, or some pixels with higher temperatures are removed, and some pixels with lower temperatures are removed, for example, M pixels with the highest temperatures and N pixels with the lowest temperatures are removed, a plurality of pixels are selected from the remaining pixels, and for example, the preset rule may be a rule in which the N pixels with the lowest temperatures are removed from the M pixels with lower temperatures, and a plurality of pixels are selected from the remaining pixels, where M > N. In a specific example, the pixel points are sorted according to the temperature, the lowest 100 pixel points are selected, then the lowest 30 pixel points are removed, and the average value of the corresponding temperatures of the last remaining 70 pixel points is calculated. In one embodiment, the first infrared thermal image may include a plurality of images, and the calculation process may be to calculate an ambient temperature of each first infrared thermal image, and then take an average value of each calculation result as the ambient temperature.
The controller 2 is also arranged to identify a body temperature from the second infrared thermal image taken from the thermal imaging sensor at the time of detection, and to correct the body temperature in dependence on the ambient temperature. The infrared thermal image for identifying the temperature of the human body may be the image obtained by calculating the average temperature, or may be another image.
In the embodiment of the present application, the body temperature identified by the controller 2 from the second infrared thermal image is the body surface temperature of the human body at the current ambient temperature.
According to actual tests, the lower the environmental temperature is, the lower the body surface temperature of the person is, so that the human body temperature identified by correcting the environmental temperature can be obtained according to the preset temperature corresponding relation or the preset compensation threshold value under the current environmental temperature.
The human body temperature measured in the above process is the body surface temperature of the human body, and in some examples, the actual temperature of the human body may be obtained according to the corresponding relationship between the body surface temperature and the actual temperature of the human body.
In the embodiment of the application, after the controller of the thermal imaging temperature measuring device acquires the first infrared thermal image from the thermal imaging sensor, a plurality of pixel points which are removed from external interference and can reflect the ambient temperature are selected from the first infrared thermal image according to a preset rule, the average value of the corresponding temperatures of the plurality of pixel points is calculated to serve as the ambient temperature, and the human body temperature identified from the infrared thermal image is corrected through the ambient temperature. The thermal imaging temperature measuring device of the embodiment of the application does not need to additionally increase a temperature sensor to detect the ambient temperature, the calculated ambient temperature gets rid of the interference of external factors, and the thermal imaging temperature measuring device is not affected by the heating of the thermal imaging temperature measuring device, so that the measurement of the ambient temperature is more accurate, and the detection of the human body temperature is more accurate.
In some embodiments, in order to achieve rapid detection of the temperature of the human body, the first infrared thermal image and the second infrared thermal image may also be the same image, i.e. the ambient temperature may also be identified from the infrared thermal images taken by the thermal imaging sensor at the same time as the human body temperature is detected in the infrared thermal images.
When the first infrared thermal image is the same as the second infrared thermal image or a face also appears in the first infrared thermal image, in order to more intelligently and accurately select a plurality of pixel points from the first infrared thermal image to calculate the ambient temperature, the thermal imaging temperature measurement device in the embodiment of the present application further intelligently removes the pixel points occupied by the face image from the first infrared thermal image, as shown in fig. 2, in an exemplary embodiment, the thermal imaging temperature measurement device further includes a camera 4, the camera 4 is connected with the controller 2, and the camera 4 is configured to capture a monitoring image matched with the infrared thermal image, and send the monitoring image to the controller 2.
In the embodiment of the present application, the mounting position of the camera 4 is adjacent to the mounting position of the thermal imaging sensor 1, and the fields of view of the shots are the same.
According to a preset rule, selecting a plurality of pixel points from a first infrared thermal image shot by the thermal imaging sensor, specifically:
identifying a first face image from a first monitoring image shot by the camera 4 through a face identification algorithm, and acquiring a coordinate of the first face image in the first monitoring image, wherein the first monitoring image is matched with the first infrared thermal image; converting coordinates of the first facial image in the first monitored image to coordinates in the first infrared thermal image according to the resolution of the first monitored image and the resolution of the first infrared thermal image; and removing pixel points corresponding to the coordinates of the first face image in the first infrared thermal image, and selecting a plurality of pixel points from the rest pixel points. The method of selecting a plurality of pixel points from the remaining pixel points may refer to the method of selecting a plurality of pixel points from the first infrared thermal image captured by the thermal imaging sensor in the above embodiment. In some examples, the ambient temperature is not calculated from the current infrared thermal image when it is determined that the size of the current face image exceeds a set threshold.
In the embodiment of the application, the face image may be recognized from the monitored image by using an existing face recognition algorithm, and in other examples, the controller may also perform the card punching recognition after recognizing the face from the monitored image by using a face recognition algorithm.
When infrared radiation propagates in the air, the infrared radiation is absorbed and scattered by various components in the air, so that the radiation power is attenuated more as the distance is longer, therefore, in some examples, a distance measuring sensor is further installed in the thermal imaging temperature measuring device, and the measured temperature of the human body is compensated by measuring the distance between the human body and the thermal imaging sensor. However, the cost is increased by adding the distance sensor, and the volume of the thermal imaging temperature measuring device is further increased, so as to solve the problem, in the embodiment of the present application, when the temperature of the human body is identified from the second infrared thermal image, the controller 2 further identifies the second face image from the second monitoring image shot by the camera through the face identification algorithm, and obtains the coordinates of the second face image in the second monitoring image, wherein the second monitoring image is matched with the second infrared thermal image; and after the coordinates of a second face image are acquired from the second monitoring image, calculating the size of the second face image, determining the distance between the thermal imaging sensor 1 and the human body according to the size of the second face image, and correcting the temperature of the human body according to the distance.
The distance between the thermal imaging sensor 1 and the human body is determined according to the size of the second face image, and specifically may be determined by judging the proportion of the second face image occupying the first monitoring image, or the proportion of the number of pixels occupied by the second face image occupying the pixels of the second monitoring image, and the like.
In the embodiment of the application, based on the influence of the ambient temperature and the distance on the thermal imaging temperature measurement, the identified human body temperature is corrected according to the calculated ambient temperature and the obtained distance between the thermal imaging sensor and the human body, and the actual human body temperature corresponding to the human body temperature measured at the current distance can be obtained according to the preset distance corresponding relation or the preset distance compensation threshold value according to the human body temperature identified by the distance correction.
In order to more accurately identify the temperature of the human body from the second infrared thermal image, in one embodiment, the controller is further configured to identify the coordinates of the forehead from the second human face image, and convert the coordinates of the forehead in the second monitoring image into the coordinates in the second infrared thermal image according to the resolution of the second monitoring image and the resolution of the second infrared thermal image; and acquiring the average temperature of pixel points corresponding to the coordinates of the forehead in the second infrared thermal image as the human body temperature identified from the second infrared thermal image.
The identifying of the forehead coordinates from the second face image may be based on a pre-trained forehead key point positioning model, and determining forehead key point information of a forehead object in the target face image, where the forehead key point positioning model is used to determine a position of the forehead object in the image, and the forehead key point information is used to indicate the position of the forehead object in the image; and outputting the determined forehead key point information.
The embodiment of the present application further provides a thermal imaging temperature measurement method, as shown in fig. 3, where the method is executed by a controller in the thermal imaging temperature measurement device in any of the above embodiments, and includes the following steps:
s301: selecting a plurality of pixel points from a first infrared thermal image shot by a thermal imaging sensor according to a preset rule, and acquiring the average temperature of the pixel points as the ambient temperature;
s302: identifying a body temperature from a second infrared thermal image taken by the thermal imaging sensor;
s303: and correcting the human body temperature according to the environment temperature.
In an exemplary embodiment, the selecting, according to a preset rule, a number of pixel points from a first infrared thermal image captured by the thermal imaging sensor includes:
and removing N pixel points with the lowest temperature from M pixel points with lower temperature, and selecting a plurality of pixel points from the rest pixel points, wherein M is larger than N.
In an exemplary embodiment, as shown in fig. 4, the selecting, according to a preset rule, a number of pixel points from the first infrared thermal image captured by the thermal imaging sensor includes:
s401: identifying a face image from a first monitoring image shot by a camera through a face identification algorithm, and acquiring coordinates of the face image in the first monitoring image, wherein the first monitoring image is matched with the first infrared thermal image;
s402: converting the coordinates of the face image in the first monitoring image into coordinates in the first infrared thermal image according to the resolution of the first monitoring image and the resolution of the first infrared thermal image;
s403: and removing pixel points corresponding to the coordinates of the face image in the first infrared thermal image, and selecting a plurality of pixel points from the rest pixel points.
In an exemplary embodiment, as shown in fig. 5, further includes:
s501: identifying a second face image from a second monitoring image shot by the camera through a face identification algorithm, and acquiring the coordinates of the face image in the second monitoring image, wherein the second monitoring image is matched with the second infrared thermal image;
s502: calculating the size of the face image according to the coordinates of the face image in the second monitoring image;
s503: determining the distance between the thermal imaging sensor and the human body according to the size of the human face image;
s504: and correcting the human body temperature according to the distance.
In an exemplary embodiment, as shown in fig. 6, further includes:
s601: identifying the coordinates of the forehead from the face image identified from the second monitoring image;
s602: converting the coordinates of the forehead in the second monitoring image into coordinates in the second infrared thermal image according to the resolution of the second monitoring image and the resolution of the second infrared thermal image;
s603: and acquiring the average temperature of pixels corresponding to the coordinates of the forehead in the second infrared thermal image as the human body temperature identified from the second infrared thermal image.
It is to be understood that the embodiments of the present application are not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the following claims.
The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application.
Claims (10)
1. A thermographic thermometry apparatus, comprising:
the thermal imaging system comprises a thermal imaging sensor and a controller, wherein the controller is connected with the thermal imaging sensor;
the controller is used for selecting a plurality of pixel points from the first infrared thermal image shot by the thermal imaging sensor according to a preset rule and acquiring the average temperature of the pixel points as the ambient temperature;
the controller is further configured to identify a body temperature from a second infrared thermal image captured by the thermal imaging sensor, and to modify the body temperature based on the ambient temperature.
2. The thermal imaging temperature measurement device according to claim 1, wherein according to a preset rule, a plurality of pixel points are selected from the first infrared thermal image captured by the thermal imaging sensor, specifically:
and removing N pixel points with the lowest temperature from M pixel points with lower temperature, and selecting a plurality of pixel points from the rest pixel points, wherein M is larger than N.
3. The thermal imaging temperature measuring device according to claim 1, further comprising a camera, wherein the camera is connected with the controller;
according to a preset rule, selecting a plurality of pixel points from a first infrared thermal image shot by the thermal imaging sensor, specifically:
identifying a first face image from a first monitoring image shot by the camera through a face identification algorithm, and acquiring a coordinate of the first face image in the first monitoring image, wherein the first monitoring image is matched with the first infrared thermal image;
converting coordinates of the first facial image in the first monitored image to coordinates in the first infrared thermal image according to the resolution of the first monitored image and the resolution of the first infrared thermal image;
and removing pixel points corresponding to the coordinates of the first face image in the first infrared thermal image, and selecting a plurality of pixel points from the rest pixel points.
4. A thermographic thermometry apparatus according to any of claims 1-3, wherein:
the controller is further configured to:
identifying a second face image from a second monitoring image shot by the camera through a face identification algorithm, and acquiring a coordinate of the second face image in the second monitoring image, wherein the second monitoring image is matched with the second infrared thermal image;
and calculating the size of the second face image according to the coordinate of the second face image in the second monitoring image, determining the distance between the thermal imaging sensor and the human body according to the size of the second face image, and correcting the temperature of the human body according to the distance.
5. The thermographic thermometry apparatus of claim 4, wherein:
the controller is further configured to:
identifying the coordinates of the forehead from a second face image identified from the second monitoring image, and converting the coordinates of the forehead in the second monitoring image into the coordinates in the second infrared thermal image according to the resolution of the second monitoring image and the resolution of the second infrared thermal image;
and acquiring the average temperature of pixels corresponding to the coordinates of the forehead in the second infrared thermal image as the human body temperature identified from the second infrared thermal image.
6. A thermal imaging temperature measurement method is characterized by comprising the following steps:
selecting a plurality of pixel points from a first infrared thermal image shot by a thermal imaging sensor according to a preset rule, and acquiring the average temperature of the pixel points as the ambient temperature;
identifying a body temperature from a second infrared thermal image taken by the thermal imaging sensor;
and correcting the human body temperature according to the environment temperature.
7. The thermal imaging thermometry method of claim 6, wherein said selecting a number of pixels from the first infrared thermal image captured by the thermal imaging sensor according to a predetermined rule comprises:
and removing N pixel points with the lowest temperature from M pixel points with lower temperature, and selecting a plurality of pixel points from the rest pixel points, wherein M is larger than N.
8. The method of claim 6, wherein selecting a plurality of pixels from the first infrared thermal image captured by the thermal imaging sensor according to a predetermined rule comprises:
identifying a face image from a first monitoring image shot by a camera through a face identification algorithm, and acquiring coordinates of the face image in the first monitoring image, wherein the first monitoring image is matched with the first infrared thermal image;
converting the coordinates of the face image in the first monitoring image into coordinates in the first infrared thermal image according to the resolution of the first monitoring image and the resolution of the first infrared thermal image;
and removing pixel points corresponding to the coordinates of the face image in the first infrared thermal image, and selecting a plurality of pixel points from the rest pixel points.
9. The thermal imaging thermometry method of any one of claims 6-8, further comprising:
identifying a second face image from a second monitoring image shot by the camera through a face identification algorithm, and acquiring the coordinates of the face image in the second monitoring image, wherein the second monitoring image is matched with the second infrared thermal image;
calculating the size of the face image according to the coordinates of the face image in the second monitoring image;
determining the distance between the thermal imaging sensor and the human body according to the size of the human face image;
and correcting the human body temperature according to the distance.
10. The method of claim 9, further comprising:
identifying the coordinates of the forehead from the face image identified from the second monitoring image;
converting the coordinates of the forehead in the second monitoring image into coordinates in the second infrared thermal image according to the resolution of the second monitoring image and the resolution of the second infrared thermal image;
and acquiring the average temperature of pixels corresponding to the coordinates of the forehead in the second infrared thermal image as the human body temperature identified from the second infrared thermal image.
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