CN110108364A - A kind of movable body temperature screening technique and system based on black matrix timing-compensation - Google Patents

A kind of movable body temperature screening technique and system based on black matrix timing-compensation Download PDF

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Publication number
CN110108364A
CN110108364A CN201910378834.9A CN201910378834A CN110108364A CN 110108364 A CN110108364 A CN 110108364A CN 201910378834 A CN201910378834 A CN 201910378834A CN 110108364 A CN110108364 A CN 110108364A
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black matrix
temperature
value
compensation
offset
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肖耀中
杨光明
黄晟
王鹏
周汉林
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Wuhan Gao De Zhi Sense Technology Co Ltd
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Wuhan Gao De Zhi Sense Technology Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0022Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
    • G01J5/0025Living bodies
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02Constructional details

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  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Radiation Pyrometers (AREA)

Abstract

A kind of movable body temperature screening technique and system based on black matrix timing-compensation, method include: before carrying out human body thermometric, the specified region of black matrix to be set in infrared image, and black matrix is made to be in hidden state;During thermometric, black matrix is periodically moved to the specified region in infrared image, acquires the AD value of each pixel in black area in black matrix actual temperature and infrared image, the AD value mean value of black area in infrared image is calculated by the AD value of each pixel;Blackbody temperature offset is calculated by the AD value mean value and black matrix actual temperature, black matrix reverts to hidden state;By the blackbody temperature offset, temperature-compensating is carried out to the temperature measured, overtemperature human body is screened using compensated temperature as actual temperature.The present invention can effectively solve the infrared radiation thermometer and the necessary relatively-stationary defect of black matrix in original infrared real-time black matrix temp measuring system, realize the movably human body thermometric based on black matrix by black matrix timing-compensation mechanism.

Description

A kind of movable body temperature screening technique and system based on black matrix timing-compensation
Technical field
The present invention relates to infrared measurement of temperature fields, and in particular to a kind of movable body temperature screening side of black matrix timing-compensation Method and system.
Background technique
Carry out human body thermometric place, usually using simultaneously have infrared pick-up head, visible image capturing head, black matrix, The human body temperature screening system of host computer computer composition carries out screening to overtemperature human body.In addition, using portable class there are also some Like the human body temperature measuring equipment of digital camera, does not use black matrix as temperature reference, used by infrared pick-up head on camera To capture abnormal temperature information, thermometric alarm is carried out.Change of the blackbody temperature used in infrared temperature measurement system within a hour Change and be lower than 0.1 degree Celsius, since blackbody temperature is stablized, real-time black matrix compensation can preferably improve thermometric accuracy.But it should Technology has the following deficiencies:
(1) black matrix real-time compensation, it is desirable that black matrix target surface is always present in infrared picture, occupying infrared effective temperature measuring area Domain.
(2) black matrix real-time compensation, it is desirable that black body locus and distance infrared relatively are relatively fixed, and head and black matrix is caused to be pacified Holding position is fixed, and mobility is inadequate, is only suitable for stream of people direction and is fixed, and temperature measuring distance is fixed, thermometric scene light is preferable, other are warm Interfere the thermometric occasion of less fixed scene in degree source.
With the appearance of mobile robot, there has been proposed infrared radiation thermometer is installed on mobile robot.Robot Shuttle inspection thermometric is carried out in crowd.Conventional body's temperature measurer of fixed black matrix, due to safety and beauty etc., Obviously be not suitable for this application scenarios.
Not using the human body temperature measuring equipment of the portable similar digital camera of black matrix, carried using infrared radiation thermometer fast Door is used as temperature reference, but due to the temperature-rise effect of lens barrel itself, the accuracy of thermometric is obviously not so good as the human body using black matrix Temp measuring system.
Summary of the invention
In order to solve the above technical problems, as the first aspect of the present invention, provide it is a kind of based on black matrix timing-compensation can Mobile human body temperature screening technique, the described method comprises the following steps:
Step 1, before carrying out human body thermometric, the specified region of black matrix is set in infrared image, and is in black matrix and is hidden State;
Step 2, during thermometric, black matrix is periodically moved to the specified region in infrared image, the practical temperature of acquisition black matrix The AD value of each pixel in black area in degree and infrared image is calculated black in infrared image by the AD value of each pixel The AD value mean value of body region;
Step 3, blackbody temperature offset is calculated by the AD value mean value and black matrix actual temperature, black matrix reverts to hiding State;
Step 4, by the blackbody temperature offset, temperature-compensating is carried out to the temperature measured, by compensated temperature Degree is used as actual temperature, screens to overtemperature human body.
Further, the method also includes the AD of black area after the completion of black matrix is mobile and in acquisition infrared image Before value, shutter compensation is first carried out, calculates the AD offset of each pixel, during subsequent thermometric, according to infrared detector institute The original AD value of each pixel of acquisition adds the AD offset of corresponding pixel points, the AD value as each pixel.
Further, shutter compensation is carried out specifically: when beating shutter, shelter from infrared survey using the uniform shutter disk of temperature Wen Yi calculates the original AD value and respective pixel of each pixel by infrared detector original AD value matrix collected Difference between point standard AD value, the AD offset as corresponding pixel points.
Further, in step 3, it is specific that blackbody temperature offset is calculated by the AD value mean value and black matrix actual temperature Are as follows: after obtaining the AD value mean value, the corresponding temperature T1 of the AD value mean value is calculated according to the relation curve between AD value and temperature, The difference between black matrix actual temperature T2 and T1 is finally calculated, as blackbody temperature offset.
Further, the method also includes: be repeated periodically step 2 and 3, periodically calculate blackbody temperature compensation Value carries out the compensation of black matrix fixed time temperature.
Further, the method also includes: introduce face recognition technology, human face region detected, and to the people measured Face regional temperature carries out temperature-compensating by blackbody temperature offset.
Further, the method also includes: when carrying out thermometric and black matrix and be in hidden state, using regular shutter benefit It repays, calculates the AD offset of each pixel, the AD value that infrared radiation thermometer acquires is compensated by the AD offset, from And reduce influence of the lens barrel temperature rise to thermometric process.
As another aspect of the present invention, a kind of movable body temperature screening side based on black matrix timing-compensation is provided Method, which comprises
During thermometric, black matrix is first made to be in hidden state;
Timing is moved to black matrix in the field range of infrared radiation thermometer;
It identifies region of the black matrix in infrared image, then acquires black matrix center 2/ in black matrix actual temperature and infrared image The AD value mean value in 3 regions calculates blackbody temperature offset according to the AD value mean value and black matrix actual temperature, and black matrix reverts to hidden Hiding state;
By the blackbody temperature offset, temperature-compensating is carried out to the temperature measured, using compensated temperature as Actual temperature screens overtemperature human body.
As yet another aspect of the invention, a kind of movable body temperature screening system based on black matrix timing-compensation is provided System, it is practical that the system comprises host computer computer, infrared radiation thermometer, black matrix, first movement device, the second mobile device and black matrixes Temperature measuring device;The first movement device is connect with the infrared radiation thermometer, to drive the infrared radiation thermometer mobile; Second mobile device is connect with the black matrix, to drive the black matrix timing to be moved to the infrared image of infrared radiation thermometer In specified region or infrared radiation thermometer infrared radiation thermometer before;The infrared radiation thermometer is for acquiring measurand AD value;The black matrix actual temperature measuring device is for acquiring black matrix actual temperature, and the host computer computer is for passing through acquisition Black area AD value mean value and the black matrix actual temperature calculate blackbody temperature offset, and mended by the blackbody temperature Value is repaid to screen overtemperature human body using compensated temperature as actual temperature the temperature progress temperature-compensating measured.
Beneficial effects of the present invention:
The present invention can be solved effectively red in original infrared real-time black matrix temp measuring system by black matrix timing-compensation mechanism Outer temperature measurer and black matrix must relatively-stationary defects;Mechanism is combined by the compensation of timing shutter, reduces lens barrel temperature rise to survey Temperature influence, within a certain period of time so that when black matrix is not in the infrared radiation thermometer visual field still can normal thermometric, enhance human body The mobility and environmental suitability of temp measuring system, make movably the human body temp measuring system based on black matrix become possibility.Separately Outside, by introducing face recognition technology, other the also maskable influences of temperature interference source to thermometric.
Detailed description of the invention
Fig. 1 is a kind of movable body temperature screening technique stream based on black matrix timing-compensation provided in an embodiment of the present invention Cheng Tu;
Fig. 2 is another movable body temperature screening technique based on black matrix timing-compensation provided in an embodiment of the present invention Flow chart;
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiment is only present invention a part, instead of all the embodiments.Based on the present invention In embodiment, all other implementation obtained by those of ordinary skill in the art without making creative efforts Example, shall fall within the protection scope of the present invention.
As shown in Figure 1, providing a kind of movable body based on black matrix timing-compensation as the first embodiment of the present invention Temperature screening technique, the described method comprises the following steps:
Step 1, before carrying out human body thermometric, the specified region of black matrix is set in infrared image, and is in black matrix and is hidden During state, i.e. black matrix are not necessarily present in infrared radiation thermometer field range;
Step 2, during thermometric, the mobile black matrix of timing is located at black matrix in the field range of infrared radiation thermometer and is in Specified region in infrared image acquires the AD value of each pixel in black area in black matrix actual temperature and infrared image, leads to The AD value for crossing each pixel calculates the AD value mean value of black area in infrared image;
Step 3, blackbody temperature offset is calculated by the AD value mean value and black matrix actual temperature, black matrix reverts to hiding State;
Step 4, by the blackbody temperature offset, temperature-compensating is carried out (i.e. by infrared measurement of temperature to the temperature measured The temperature that instrument is measured adds the blackbody temperature offset), using compensated temperature as actual temperature, by the practical temperature Degree is compared with normal temperature, is screened to overtemperature human body.
Wherein, the AD value is acquired by infrared radiation thermometer, and the infrared detector in infrared radiation thermometer is by collected object The thermal radiation signal in body surface face is converted into corresponding electric signal, can be obtained using voltage amplification, AD conversion (analog-to-digital conversion) Corresponding AD value obtains different Y16 data, each AD value or Y16 data correspond to a temperature, can pass through AD value and temperature Relation curve inquiry between degree.
Preferably, the method also includes the AD values of black area after the completion of black matrix is mobile and in acquisition infrared image Before, shutter compensation is first carried out, calculates the AD offset of each pixel, during subsequent thermometric, is adopted according to infrared detector The original AD value of each pixel of collection adds the AD offset of corresponding pixel points, the AD value as each pixel.
Wherein, the progress shutter compensation specifically: when beating shutter, shelter from infrared survey using the uniform shutter disk of temperature Wen Yi calculates the original AD value and respective pixel of each pixel by infrared detector original AD value matrix collected Difference between point standard AD value, the AD offset as corresponding pixel points.
Wherein, standard AD value when shutter is beaten, the corresponding AD of current shutter piece temperature can be found out by looking into relation curve Value is standard AD value when beating shutter.
Since infrared radiation thermometer is present in the closed environment of lens barrel, the air duct radiation formed in lens barrel by fan, mirror Temperature and uneven in cylinder, infrared detector can also receive the heat of lens barrel other than the heat radiation for receiving target Radiation, with the raising of lens barrel temperature, the lens barrel radiation that detector receives is gradually increased, so that AD value also increases.Due to mirror The inhomogeneities of temperature in cylinder, the AD value increase of infrared each pixel is also inconsistent, so during thermometric, it is also necessary to subtract Influence of the temperature to thermometric in few lens barrel.In consideration of it, the present invention reduces the temperature pair in lens barrel in such a way that shutter compensates The influence of thermometric shelters from infrared radiation thermometer using the uniform shutter disk of temperature, records each pixel AD when beating shutter Value.Theoretically, the consistent object of temperature, AD value should be consistent, but due to the influence of lens barrel temperature rise, actual acquisition is arrived every The original AD value of a pixel is non-uniform.The present invention passes through infrared detector original AD value collected when beating shutter Matrix calculates the difference between the original AD value of each pixel and standard value, to calculate the AD compensation of each pixel Value obtains AD compensation value matrix.During subsequent thermometric, using compensation value matrix and original AD value matrix, thermometric is calculated The AD value matrix used, i.e. Y16 value matrix.
Preferably, in step 3, it is specific that blackbody temperature offset is calculated by the AD value mean value and black matrix actual temperature Are as follows: after obtaining the AD value mean value, the corresponding temperature T1 of the AD value mean value is calculated according to the relation curve between AD value and temperature, The difference between black matrix actual temperature T2 and T1 is finally calculated, as blackbody temperature offset.
In above-described embodiment, when carrying out normal thermometric, the AD value of measurand is acquired by infrared radiation thermometer, according to AD Value, by the relation curve, the corresponding relation curve of AD value for calculating each pixel is tabled look-up value, i.e. measured temperature, The value of tabling look-up is plus blackbody temperature offset, the actual temperature value of as each pixel.
Preferably, the method also includes: be repeated periodically step 2 and 3, periodically calculate blackbody temperature offset, Carry out the compensation of black matrix fixed time temperature.
Preferably, the method also includes: introduce face recognition technology, human face region detected, and to the face measured Regional temperature carries out temperature-compensating by blackbody temperature offset, shields other influences of temperature interference source to thermometric.
Preferably, the method also includes: when carrying out thermometric and black matrix and being in hidden state, regular shutter can also be used Compensation, calculates the AD offset of each pixel, is compensated by the AD offset to the AD value that infrared radiation thermometer acquires, And the AD value of infrared radiation thermometer acquisition is added into the AD offset as the AD value used when thermometric, to reduce lens barrel temperature rise Influence to thermometric process.
As shown in Fig. 2, providing a kind of movable body based on black matrix timing-compensation as another embodiment of the present invention Temperature screening technique, which comprises
Step a first makes black matrix be in hidden state during thermometric;
Step b, is periodically moved to black matrix in the field range of infrared radiation thermometer;
Step c identifies region of the black matrix in infrared image, then acquires black matrix in black matrix actual temperature and infrared image The AD value mean value in 2/3 region of center calculates blackbody temperature offset according to the AD value mean value and black matrix actual temperature, and black matrix is extensive Again at hidden state;
Step d carries out temperature-compensating to the temperature measured, by compensated temperature by the blackbody temperature offset Degree is used as actual temperature, screens to overtemperature human body.
In above-described embodiment, blackbody temperature offset can be periodically calculated, black matrix timing is carried out by repeating step b and c Temperature-compensating;In order to reduce influence of the lens barrel temperature rise to school temperature process, in black matrix correcting process, shutter compensation can be first carried out; In order to reduce influence of the lens barrel temperature rise to thermometric process, corrected without black matrix, when carrying out normal thermometric, using regular Shutter compensation mechanism, the influence by lens barrel temperature rise to thermometric process and school temperature process are reduced to minimum.In addition, because thermometric scene It is not fixed, other influences of temperature interference source to thermometric can not be shielded, in mobile human body temp measuring system, in combination with face Thermometry (thermometry of face containing visible light and infrared face thermometry), to shield other temperature interference sources.
Human body thermometric provided by the invention based on black matrix, introduces the timing-compensation mechanism of black matrix, and black matrix need not when thermometric It is appeared in infrared field range in real time, black matrix correction of timing time interval can carry out live setting according to actual motion effect; During black matrix timing-compensation, shutter compensation is first passed through, reduces the influence that lens barrel temperature rise acquires black matrix offset data, it is non-fixed When compensation process in, compensated by timing shutter, reduce influence of the lens barrel temperature rise to thermometric, timing aperture time can be according to reality The setting of operational effect scene;By intelligent black matrix detection algorithm, actual area of the black matrix target surface in infrared image can be calculated, So that black area need not be preset, reduce because being influenced caused by the inaccuracy of black body locus caused by mechanical reason.
As another embodiment of the invention, a kind of movable body temperature sieve based on black matrix timing-compensation is also provided System is selected, the system comprises host computer computer, infrared radiation thermometer, black matrix, first movement device, the second mobile device and black matrixes Actual temperature measuring device;The first movement device is connect with the infrared radiation thermometer, to drive the infrared radiation thermometer It is mobile;Second mobile device is connect with the black matrix, to drive the black matrix timing to be moved to the red of infrared radiation thermometer Before the infrared radiation thermometer in specified region or infrared radiation thermometer in outer image;The infrared radiation thermometer is tested for acquiring The AD value of object;The black matrix actual temperature measuring device is for acquiring black matrix actual temperature, and the host computer computer is for leading to The AD value mean value and the black matrix actual temperature for crossing the black area of acquisition calculate blackbody temperature offset, and pass through the black matrix Temperature compensation value carries out temperature-compensating to the temperature measured, using compensated temperature as actual temperature, to overtemperature human body into Row screening, and show temperature-measuring results.
In addition, the host computer circuit be also used to calculate each AD value institute by relation curve between AD value and temperature it is right The temperature answered.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (9)

1. a kind of movable body temperature screening technique based on black matrix timing-compensation, which is characterized in that the method includes with Lower step:
Step 1, before carrying out human body thermometric, the specified region of black matrix is set in infrared image, and black matrix is made to be in hidden state;
Step 2, during thermometric, black matrix is periodically moved to the specified region in infrared image, acquire black matrix actual temperature with And in infrared image each pixel in black area AD value, black matrix area in infrared image is calculated by the AD value of each pixel The AD value mean value in domain;
Step 3, blackbody temperature offset is calculated by the AD value mean value and black matrix actual temperature, black matrix reverts to hiding shape State;
Step 4, by the blackbody temperature offset, temperature-compensating is carried out to the temperature measured, compensated temperature is made For actual temperature, overtemperature human body is screened.
2. the movable body temperature screening technique according to claim 1 based on black matrix timing-compensation, which is characterized in that The method also includes: after the completion of black matrix is mobile and in acquisition infrared image before the AD value of black area, first carry out shutter benefit It repays, calculates the AD offset of each pixel, during subsequent thermometric, according to infrared detector each pixel collected Original AD value adds the AD offset of corresponding pixel points, the AD value as each pixel.
3. the movable body temperature screening technique according to claim 2 based on black matrix timing-compensation, which is characterized in that Carry out shutter compensation specifically: when beating shutter, shelter from infrared radiation thermometer using the uniform shutter disk of temperature, pass through infrared acquisition Device original AD value matrix collected, calculates the difference between the original AD value of each pixel and corresponding pixel points standard AD value Value, the AD offset as corresponding pixel points.
4. the movable body temperature screening technique according to claim 1 based on black matrix timing-compensation, which is characterized in that In step 3, blackbody temperature offset is calculated by the AD value mean value and black matrix actual temperature specifically: it is equal to obtain the AD value After value, the corresponding temperature T1 of the AD value mean value is calculated according to the relation curve between AD value and temperature, it is practical finally to calculate black matrix Difference between temperature T2 and T1, as blackbody temperature offset.
5. the movable body temperature screening technique according to claim 1 based on black matrix timing-compensation, which is characterized in that The method also includes: it is repeated periodically step 2 and 3, periodically calculates blackbody temperature offset, carries out black matrix fixed time temperature Compensation.
6. the movable body temperature screening technique according to claim 1 based on black matrix timing-compensation, which is characterized in that The method also includes: face recognition technology is introduced, detects human face region, and black matrix is passed through to the human face region temperature measured Temperature compensation value carries out temperature-compensating.
7. the movable body temperature screening technique according to claim 1 based on black matrix timing-compensation, which is characterized in that The method also includes: when carrying out thermometric and black matrix is in hidden state, is compensated using regular shutter, calculate each pixel AD offset, the AD value that infrared radiation thermometer acquires is compensated by the AD offset, to reduce lens barrel temperature rise pair The influence of thermometric process.
8. a kind of movable body temperature screening technique based on black matrix timing-compensation, which is characterized in that the described method includes:
During thermometric, black matrix is first made to be in hidden state;
Timing is moved to black matrix in the field range of infrared radiation thermometer;
It identifies region of the black matrix in infrared image, then acquires 2/3rd area of black matrix center in black matrix actual temperature and infrared image The AD value mean value in domain calculates blackbody temperature offset according to the AD value mean value and black matrix actual temperature, and black matrix reverts to hiding State;
By the blackbody temperature offset, temperature-compensating is carried out to the temperature measured, using compensated temperature as practical Temperature screens overtemperature human body.
9. a kind of movable body temperature screening system based on black matrix timing-compensation, which is characterized in that the system comprises upper The electromechanical brain in position, infrared radiation thermometer, black matrix, first movement device, the second mobile device and black matrix actual temperature measuring device;It is described First movement device is connect with the infrared radiation thermometer, to drive the infrared radiation thermometer mobile;Second mobile device Connect with the black matrix, to drive black matrix timing be moved to the specified region in the infrared image of infrared radiation thermometer or Before the infrared radiation thermometer of infrared radiation thermometer;The infrared radiation thermometer is used to acquire the AD value of measurand;The black matrix is real Border temperature measuring device is used for the AD value of the black area by acquisition for acquiring black matrix actual temperature, the host computer computer Mean value and the black matrix actual temperature calculate blackbody temperature offset, and by the blackbody temperature offset to the temperature measured Degree carries out temperature-compensating and screens using compensated temperature as actual temperature to overtemperature human body.
CN201910378834.9A 2019-05-08 2019-05-08 A kind of movable body temperature screening technique and system based on black matrix timing-compensation Pending CN110108364A (en)

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