Improved techniques for quantification of detected gases are provided. In one example, a method includes receiving infrared radiation from a scene at a sensor array comprising first and second sets of infrared sensors associated with first and second wavelength ranges of the infrared radiation, respectively. The method also includes capturing first and second images by the first and second sets of infrared sensors, respectively. The method also includes detecting a background object in the first image. The method also includes tracking the background object to identify the background object in the second image. The method also includes updating a radiometric scene map with first and second radiometric values associated with the first and second images and correlated to a location of the background object in the scene. The method also includes performing gas quantification using the radiometric scene map. Additional systems and methods are also provided.

An IR imaging device includes an optical element receiving infrared radiation from a scene, a filter blocking IR radiation outside of a particular range of wavelengths, an array of sensor pixels to capture an image of the scene based on infrared radiation received through the optical element and filter, the array of sensor pixels comprising a first array of sensor pixels to image gas in within a first spectral bandwidth, and a second array of sensor pixel to sense IR radiation in a second spectral bandwidth where gas is not detected, a read-out integrated circuit (ROIC) and logic circuitry to generate a first image sensed by the first array and a second image sensed by the second array, and gas detection logic to detect the presence of gas in the first image.

This gas imaging device makes it possible to photograph gas without placing a burden on a user while enhancing the evidential reliability of imaging results. This gas imaging device comprises: an infrared imaging section for imaging, under a predetermined first photography condition, infrared radiation from a given area from which gas could leak; an image processing section for generating an image of the given area on the basis of output results from the infrared imaging section; and a control section for, on the basis of vicinity information for the given area and the output results of the infrared imaging section, calculating a reliability indicating whether the first photography condition is suitable for photography of the gas and storing an image of the given area in a storage section in association with at least one from among the reliability and the vicinity information.

A method of identifying an object signature in an environment includes acquiring infrared information from the environment using a detection unit in order to obtain an infrared wavelength spectrum associated with the environment. The method further includes selecting three wavelength bands of the infrared wavelength spectrum using a filtering unit and detecting a presence of the three wavelength bands of the infrared wavelength spectrum in the environment by filtering the selected three wavelength bands using the filtering unit. The method further includes determining an intensity indicator for the three selected wavelength bands using a processing unit and classifying the object signature using the processing unit based on the determined intensity indicator in order to identify the object signature.

Various techniques are disclosed to provide a quantification of a gas leak based on an image of a gas plume generated by the leak. An image location that corresponds to the origin of the gas leak is determined. An exit border is disposed on the image based on the image location that corresponds to the origin of the gas leak. A gas leak rate is computed based at least on gas concentration values of the pixels that overlap the exit border.

A method for detecting and quantifying gas emissions from a satellite image comprises obtaining an image of an area of interest, determining an amount of variation in light intensity within the image, and correlating the amount of variation in light intensity within the image to a gas concentration of a gas emission located in the area of interest.

A system for monitoring a petrochemical installation is disclosed. The system can include an optical imaging system comprising an array of optical detectors. The system can comprise processing electronics configured to process image data detected by the optical imaging system. The processing electronics can be configured to detect a target species based at least in part on the processed image data. The processing electronics can further be configured to, based on a detected amount of the target species, transmit an alarm notification to an external computing device over a communications network indicating that the target species has been detected at the petrochemical installation.

An infrared (IR) imaging system for determining a concentration of a target species in an object is disclosed. The imaging system can include an optical system including a focal plane array (FPA) unit behind an optical window. The optical system can have components defining at least two optical channels thereof, said at least two optical channels being spatially and spectrally different from one another. Each of the at least two optical channels can be positioned to transfer IR radiation incident on the optical system towards the optical FPA. The system can include a processing unit containing a processor that can be configured to acquire multispectral optical data representing said target species from the IR radiation received at the optical FPA. One or more of the optical channels may be used in detecting objects on or near the optical window, to avoid false detections of said target species.

A system and methods for optically detecting a target atmospheric gas are disclosed and described. An imaging system can include a narrow-band optical interference filter with a center wavelength that corresponds to a feature in an absorption spectrum of a target gas at a normal angle of incidence. An optical component can receive incoming light from the target gas that has passed through the narrow-band optical interference filter, wherein the narrow-band optical interference filter is tilted relative to the optical component, which tilt shifts the wavelength of light from each target point that is able to pass through the narrow-band optical interference filter. A camera can receive the incoming light that has been focused by the optical component. Multiple image frames are collected for different orientations of the system with respect to the target and analyzed to perform hyperspectral characterization of target gas absorption.

Thermal imaging systems can include an infrared camera module (200), a user interface (208), a processor (222), and a memory. The memory can include instructions to cause the processor (222) to perform a method upon a detected actuation from the user interface (208). The method can include performing a non-uniformity correction (1702) to reduce or eliminate fixed pattern noise from infrared image data from the infrared camera module (200). The method can include capturing infrared images (1704) at a plurality of times and register the captured images via a stabilization process (1706). The registered, non-uniformity corrected images can be used to perform a gas imaging process (1700). A processor (222) can be configured to compare an apparent background temperature in each of a plurality of regions of infrared image data to a target gas temperature. The processor (222) can determine if such regions lack sufficient contrast to reliably observe the target gas.