An infrared imaging device comprises an infrared imaging sensor to detect infrared light as heat, a temperature drift compensation amount calculator to calculate a temperature drift compensation amount in accordance with a temperature change of the substrate, with respect to a pixel output outputted from each of the plurality of pixels, a compensation amount calculation function generator to generate a function with the temperature of the substrate as an independent variable; and a timing controller to cause the infrared imaging sensor and the substrate temperature sensor to synchronously output data to the compensation amount calculation function generator for generating the function, wherein the compensation amount calculation function generator uses the data for generation output after the generation of the function as additional data for improving accuracy of the function.

A system for measuring temperature of one or more subjects within a scene including a reference object having an unknown emissivity, having an ambient temperature, the system comprising: a visible spectrum camera capable of acquiring images of the scene comprising (a) at least a Region of Interest (RoI) of each of the subjects, and (b) the reference object; a thermal image sensor capable of acquiring images of the scene comprising (a) at least the RoI of each of the subjects, and (b) the reference object; and a processing circuitry configured to: obtain (a) a visible spectrum image captured by the visible spectrum camera, and (b) a thermal image captured by the thermal image sensor, and (c) an indication of a scene ambient temperature within the scene; register the visible spectrum image and the thermal image onto a common coordinate system; identify (a) RoI pixels, on the common coordinate system, of the RoIs of the subjects within the visible spectrum image, (b) reference object pixels, on the common coordinate system, of the reference object within the visible spectrum image and (c) a parameter correlated to an emissivity of the reference object, based on the reference temperature and on the indication of the scene ambient temperature; determine (a) RoI temperatures by analyzing respective RoIs pixels on the thermal image, and (b) a reference temperature by analyzing the reference object pixels on the thermal image; and upon existence of a difference between the reference temperature and the scene ambient temperature, correct the RoI temperatures, based on the difference and utilizing the parameter, to compensate for the difference, giving rise to corrected RoI temperatures.

A surface temperature measuring method includes: acquiring a radiation light amount of a surface of a measurement object; irradiating the surface of the measurement object with light under a specular reflection condition to acquire a specular reflection light amount; irradiating the surface of the measurement object with light under a diffuse reflection condition to acquire a diffuse reflection light amount; calculating an emissivity of the surface of the measurement object by using a model indicating a relationship between an emissivity and a specular reflectance, and a relationship between the emissivity and a diffuse reflectance of the surface of the measurement object, the acquired specular reflection light amount, and the acquired diffuse reflection light amount; and calculating a surface temperature of the measurement object using the acquired radiation light amount and the calculated emissivity.

A thermal image-based temperature measurement calibration method applicable to a thermal image device is provided. The method includes a capturing stage, a processing stage and a calibration stage. During the capturing stage, the thermal image device captures a monitored environment to obtain a measured thermal image. During the processing stage, a processor processes on the measured thermal image to obtain a target information, wherein the target information corresponds to a target in the monitored environment, and the target information includes a target image block and a target measured temperature corresponding to the target image block. During the calibration stage, the processor obtains a distance compensation value according to a pixel number of the target image block, and the processor performs a calibration operation to the target measured temperature at least according to the distance compensation value to obtain a calibrated temperature value corresponding to the target.

An infrared thermopile sensor includes a silicon cover having an infrared lens, an infrared sensing chip having duo-thermopile sensing elements, and a microcontroller chip calculating a temperature of an object. The components are in a stacked 3D package to decrease the size of the infrared thermopile sensor. The infrared sensing chip and the microcontroller chip have metal layers to shield the thermal radiation. The conversion from wrist temperature to body core temperature uses detected ambient temperature and fixed humidity or imported humidity level to calculate the body core temperature based on experimental data and curve fitting. The skin temperature compensation can be set differently for different sex gender, different standard deviation of wrist temperature and external relative humidity reading.

Systems, methods, and computer program products for thermal contrast determinations are provided. An example imaging system includes a first infrared (IR) imaging device that generates first IR image data of a field of view of the first IR imaging device and a computing device connected with the first IR imaging device. The computing device receives probe temperature data from a temperature probe indicative of an external environment of the imaging system and receives the first IR image data from the first IR imaging device. The computing device determines background temperature data based upon the first IR image data, determines gas temperature data based upon the probe temperature data, and determines a thermal contrast for each pixel based upon a comparison between the background temperature data and the gas temperature data. The computing device further determines a detection limit for each pixel as a function of thermal contrast.

The present invention relates to an externally mounted calibration device and a temperature measurement system using the same. The temperature measurement system calibrates the temperature of the thermal camera using an externally mounted temperature calibration device that is mounted on one side of the outside of the thermal camera unit and includes a temperature measurement substrate with a temperature sensor. The temperature measurement substrate of the externally mounted temperature calibration device is captured simultaneously with the subject to be measured on the screen of the thermal camera, and using the temperature of the temperature measurement substrate measured by the temperature sensor and the temperature of the temperature measurement substrate measured by the thermal camera, the temperature of the subject to be measured by the thermal camera is calibrated, thereby ensuring that the thermal camera always maintains a constant temperature measurement result regardless of the environmental temperature when used.

A method and an imaging system for providing an infrared image of an object comprises an optical element configured to capture infrared radiation from the object, an infrared sensing module, a processing unit, and a shutter assembly. The infrared sensing module comprises a plurality of infrared detectors, each configured to receive the infrared radiation from the object after passage through the optical element and generate a measurement signal from the received infrared radiation. The processing unit is coupled to the infrared sensing module and configured to convert the measurement signals into temperature data associated with the object for providing the infrared image. The shutter assembly is disposed between the infrared sensing module and the optical element, and is configured to selectively pass the infrared radiation from the object through to the infrared sensing module. The shutter assembly comprises a temperature controller configured to adjust a temperature of the shutter assembly.

A non-contact body temperature measurement device includes a thermal imager, an anemometer and a processing unit. The thermal imager is provided to capture thermal images. The anemometer is provided to measure wind speed and output a wind speed signal. The processing unit is provided to process the thermal images according to the wind speed signal and remove the thermal image showing great variation in temperature between two consecutive frames. Consequently, an accurate body temperature can be measured through the processed thermal images.

Provided here are: an infrared imaging element that receives infrared light to capture a thermal image; an element temperature sensor that detects a temperature of the infrared imaging element; an FPN memory that stores therein FPN data at each of the temperatures; a frame memory that saves a plurality of pieces of frame data composed of thermal images captured by the infrared imaging element in a fixed period of time; and an FPN data generation unit that, when an imaging target is determined not to have changed on the basis of the frame data, acquires from the FPN memory, the FPN data corresponding to the temperature of the infrared imaging element at which said frame data were obtained; and performs averaging processing between average values AF of the plurality of pieces of frame data and the thus-acquired FPN data, to thereby regenerate the FPN data in an updated manner.