Abstract: An image-processing device, for gas detection that performs image processing on infrared images of a subject being taken at plurality of times a day, includes a hardware processor that generates physical-quantity-change data indicating chronological change in physical quantity determined based on pixel data of pixels constituting the infrared image. The hardware processor selects, from the pixels constituting the infrared image, a reference pixel used as a reference and a comparison pixel to be compared with the reference pixel, and calculates a degree of phase similarity indicating a degree of similarity in phase between a waveform of the physical-quantity-change data of the reference pixel and a waveform of the physical-quantity-change data of the comparison pixel. The hardware processor determines, based on the degree of phase similarity, that an image including the reference pixel and the comparison pixel is not a gas image.

Abstract: An optical device includes: a lens body having multiple lenses arranged such that optical axes thereof are parallel to one another; a light-shielding wall that is disposed for the lens body and blocks, in an optical axis direction, portion of light directed to the multiple lenses; and a sheet member that covers a surface of the light-shielding wall, the surface being perpendicular to the optical axes, and allows light to pass therethrough.

Abstract: A gas-detection image-processing device includes: a calculation unit that calculates identification values respectively corresponding to a plurality of pixels constituting an infrared image of a monitoring target, the identification values being identification values for identifying a pixel constituting a gas image and a pixel constituting a non-gas image; and an identification unit that, on the basis of the identification values, identifies, in a monitoring image that is generated by using the infrared image, a pixel constituting the gas image and a pixel constituting the non-gas image.

Abstract: An optical device includes: a lens member including a plurality of lenses arranged such that optical axes of the lenses are substantially parallel to one another; and a plurality of column parts that are each provided along the optical axis of each lens among the plurality of lenses and each allow light to pass through inside, each column part having an outer periphery through which light is less likely to pass from inside to outside the column part than through an end portion of the column part in a direction along the optical axis, the plurality of column parts being integrally formed and disposed to face the lens member.

Abstract: An image processing device for gas detection includes a first generation unit and a display control unit. The first generation unit obtains first time-series images whose imaging time is a first predetermined time period, sets a plurality of second predetermined time periods arranged in a time series and included in the first predetermined time period, and generates, for a plurality of second time-series images respectively corresponding to the plurality of second predetermined time periods, a representative image of a part (second time-series images) of the first time-series images corresponding to the second predetermined time period, thereby generating time-series representative images. The first generation unit generates a representative image including a gas region in the case of generating the representative image using the second time-series images including the gas region.

Abstract: This gas leak position estimation device is provided with a specifying unit and a first determination unit. The specifying unit specifies a gas region image indicating a region in which the gas hangs in an image obtained by photographing a monitoring region. The first determination unit determines a pixel indicating a gas leak estimated position estimated to be a position at which the gas is leaking out from a plurality of pixels constituting an outline of the gas region image.

Abstract: There is provided a moving body risk assessment device including a moving body detection unit that detects presence or movement of a moving body within an imaging range on the basis of image information imaged in a wavelength region different from a visible region, and a risk assessment unit that assesses a risk to the detected moving body from the image information and a result of the moving body detection obtained by the moving body detection unit.

Abstract: An image processing device includes a reception unit and a setting unit. The reception unit receives an input image signal, and a synchronization signal used to generate an output image signal on a basis of the input image signal. The setting unit sets, after the reception unit receives the synchronization signal, a reception prohibition period that prohibits reception of a different synchronization signal by the reception unit.

Abstract: A gas-detection image processing device includes first, second, and third processors. The first processor generates a plurality of first images by applying processing to extract a gas candidate region to each of a plurality of infrared images captured in time series during a predetermined period. The second processor generates a second image, while using the first images, by applying processing to extract an appearance region indicating that a gas candidate region has appeared in at least a part of the predetermined period. The second processor generates two or more second images by applying the processing to extract the appearance region to the first images generated in a manner corresponding to two or more of the predetermined periods respectively. The third processor generates a third image by applying processing to extract a common region of the appearance regions while using the two or more of the second images.

Abstract: A gas-detection image processing device includes a first processor, a second processor, a third processor, and a setter. The first processor generates a plurality of first images by applying processing to extract a gas candidate region to each of the plurality of infrared images captured in time series. The second processor generates a second image including a first appearance region based on two or more of the first images corresponding to the first predetermined period, and the first appearance region indicates that the gas candidate region has appeared in at least a part of the first predetermined period. The third processor generates a third image including a second appearance region based on two or more of the first images corresponding to a second predetermined period different from the first predetermined period, and the second appearance region indicates that the gas candidate region has appeared in at least a part of the second predetermined period.

Abstract: A gas detection-use image processing device includes a first processing part that acquires a first image including a first region image indicating a region where a gas candidate has appeared, extracted from an infrared image, on each of a plurality of infrared images captured in time series in a predetermined period to acquire a plurality of first images. The gas detection-use image processing device also includes a second processing part that generates a second image including a second region image in at least a part of the predetermined period, by using the plurality of first images. The first processing part acquires first images in each of at least two predetermined periods. The second processing part generates at least two second images. The gas detection-use image processing device further includes a calculation part that calculates similarity of the at least two second images.

Abstract: An image-processing device, for gas detection that performs image processing on infrared images of a subject being taken at plurality of times a day, includes a hardware processor that generates physical-quantity-change data indicating chronological change in physical quantity determined based on pixel data of pixels constituting the infrared image. The hardware processor selects, from the pixels constituting the infrared image, a reference pixel used as a reference and a comparison pixel to be compared with the reference pixel, and calculates a degree of phase similarity indicating a degree of similarity in phase between a waveform of the physical-quantity-change data of the reference pixel and a waveform of the physical-quantity-change data of the comparison pixel. The hardware processor determines, based on the degree of phase similarity, that an image including the reference pixel and the comparison pixel is not a gas image.

Abstract: An image processing device performing image processing on images obtained by shooting an object to be monitored at a plurality of time points. The image processing device includes a hardware processor that performs a process of removing, from image data indicating the images, second frequency component data that is lower in frequency than first frequency component data indicating a luminance of the object to be monitored, the second frequency component data indicating a background luminance change of the object to be monitored.

Abstract: Provided is a gas concentration length measurement device into which image data (moving image data) representing a plurality of infrared images is input, the image data being obtained by taking infrared images of a gas leakage monitoring target at a plurality of times. The gas concentration length measurement device generates chronological pixel data in which pieces of pixel data for pixels that are at the same positions in the plurality of infrared images are arranged chronologically, then uses the chronological pixel data for a predetermined pixel among the plurality of pixels constituting the infrared images as a basis to determine a with-gas background temperature indicating the background temperature when a gas is present in a predetermined region corresponding to the predetermined pixel and a without-gas background temperature indicating the background temperature when gas is not present in the predetermined region.

Abstract: A gas detection-use image processing device includes a processing part that performs first processing of acquiring a first image including a region image illustrating a region where a gas candidate has appeared, extracted from an infrared image, on each of a plurality of infrared images captured at a plurality of different times to acquire a plurality of first images. The gas detection-use image processing device also includes a decision part that decides similarity between two first images, in consideration of a movement of the region image in the two first images. The gas detection-use image processing device further includes a determination part that determines whether the gas candidate is a gas, based on the similarity decided by the decision part and whether the region image is moved.

Abstract: An image processing device includes a reception unit that receives an input image signal, and a synchronization signal used to generate an output image signal on a basis of the input image signal. In a case in which, after receiving the synchronization signal, the reception unit does not receive a next synchronization signal within a predetermined reception period, the reception unit conducts an automatic reception process that treats the next synchronization signal as being received.

Abstract: An image processing device includes a reception unit and a generation unit. The reception unit receives an input image signal, and a synchronization signal used to generate an output image signal on a basis of the input image signal. The generation unit generates, in a case in which the reception unit receives an initial synchronization signal of a unit of image reading, a synchronization signal for a subsequent input image signal. The reception unit receives the synchronization signal generated by the generation unit.

Abstract: The gas detection device according to the present invention is provided with: a first image processing unit for generating a first binary image for indicating in binary fashion the inside and outside of a first region indicating water vapor and a gas to be detected, on the basis of a first image generated using an optical filter having a first pass wavelength band including at least an absorption wavelength band of the gas; a second image processing unit for generating a second binary image indicating in binary fashion the inside and outside of a second region indicating the water vapor, on the basis of a second image generated using an optical filter having a second pass wavelength band different from the absorption wavelength band; and a third image processing unit for calculating a difference between the first binary image and the second binary image.

Abstract: This gas leak position estimation device is provided with a specifying unit and a first determination unit. The specifying unit specifies a gas region image indicating a region in which the gas hangs in an image obtained by photographing a monitoring region. The first determination unit determines a pixel indicating a gas leak estimated position estimated to be a position at which the gas is leaking out from a plurality of pixels constituting an outline of the gas region image.

Abstract: An image processing device performing image processing on images obtained by shooting an object to be monitored at a plurality of time points. The image processing device includes a hardware processor that performs a process of removing, from image data indicating the images, second frequency component data that is lower in frequency than first frequency component data indicating a luminance of the object to be monitored, the second frequency component data indicating a background luminance change of the object to be monitored.