273 results about "Image detector" patented technology

The invention relates to a method for reconstructing a 3D medical image of a region of interest from a set of 2D X-ray images acquired by an X-ray imaging system comprising an X-ray source(S) and an image detector (D), comprising the steps of: —computing n paths of the X-ray imaging system, n being an integer greater than or equal to 2, said paths being adapted to acquire n respective subsets of 2D X-ray images together forming the set of 2D X-ray images, each image (IA, IB, IC) of a subset defining a respective cone of projection (CA, CB, CC) of the region of interest onto the image detector, such that, for a same position of the X-ray source(S) along the n paths, the cone of projection of an image of any subset is contiguous to the cone of projection of an image of at least one other subset, wherein computing said n paths comprises: —placing a virtual isocenter (O) of the X-ray imaging system at a given position or set of positions relative to a center (C) of the region of interest, and —defining, for each position of the X-ray source along the n paths, the n cones of projection such that the center of a height of an enlarged cone formed by the union of the n cones of projection is said virtual isocenter (O): —implementing the computed n paths to acquire the n subsets of images: —reconstructing the 3D medical image by intersecting the cones of projection defined by each image of the n subsets.

A calibration target for use with a radiographic image detector includes a target body securable to the image detector and a plurality of radiopaque linear markers, e.g. wires, fixed to the target body, wherein access to the image detector by incident radiation is at least partially blocked by the plurality of linear markers. By using the geometric properties of wires and advanced detection techniques, a precise calibration suitable for high-quality, volumetric three-dimensional CT reconstruction from biplanar X-ray images is achieved.

A system for the analysis of tubes adapted to contain biological samples is herein disclosed, the system having at least one support for a tube adapted to contain a biological sample, at least one image detector configured to acquire at least one image of the tube arranged on the support, and a processing unit adapted to process the images of the tube acquired by the image detector, wherein the processing unit is configured to perform a processing procedure based on a neural network which is trained based on exemplary images of tubes, wherein, in said exemplary images, the tubes comprise a label associated thereto. The neural network is programmed to perform a classification relating to the tube contained in the input image, wherein the processing unit is configured to output an output value vector comprising a plurality of output values, each of said output values being related to a certain class of the classification(s) and representing the activation level of a corresponding neuron of an output of the neural network.

The invention discloses a guided-mode resonance refractive index detection device and method based on a longitudinal gradient grating structure, and belongs to the technical field of optical sensing and imaging spectrum detection, the guided-mode resonance refractive index detection device comprises a light source, an optical isolator, a polarization controller, a collimation beam expander, a guided-mode resonance sensing chip, an image detector and a signal processing unit which are connected in sequence; the guided-mode resonance sensing chip is of a transmission type structure, the top of the guided-mode resonance sensing chip is provided with a strip-shaped nano structure which is consistent in period but longitudinally gradually changed, and an image detector is arranged below the guided-mode resonance sensing chip and used for receiving a transmission light signal penetrating through the guided-mode resonance sensing chip, generating a transmission light image and transmitting the transmission light image to the signal processing unit; and the signal processing unit is used for analyzing the transmitted light image and inverting the refractive index of the medium to be measured according to the structure mapping model. According to the invention, the longitudinal structure gradual change characteristic is introduced into the guided-mode resonance chip, so that the spatial distribution control of the monochromatic light resonance response position is realized, and finally the imaging refractive index sensing without an optical splitter is realized.

Systems and methods of detecting and monitoring edema in a subject are described. The systems and methods include light sources, image detectors, filters, and processors that determine whether a subject has edema and the degree of severity. In some embodiments, the processor fuses data from more than one imaging modality.

The invention relates to a photon counting imaging detector, in particular to a photon counting imaging detector with multiband composite detection capability, and solves the technical problem that an existing position-sensitive anode detector cannot detect multiple bands at the same time. The photon counting imaging detector with the multiband composite detection capability comprises a vacuum packaging tube body array, and a position-sensitive anode assembly, a detector frame and a detector end cover which are sequentially connected from bottom to top, the receiving ends of the vacuum packaging tube bodies are upwards arranged in the mounting block, and the N * M receiving ends of the vacuum packaging tube bodies are respectively provided with the same or different photoelectric cathodes for receiving target optical signals of different wavebands and converting the target optical signals into photoelectrons; the output ends of the N * M vacuum packaging tube bodies are respectively provided with a high-resistance collecting layer for receiving the photoelectrons and converting the photoelectrons into electronic cloud cluster signals for outputting; and the position-sensitive anode assembly is used for sensing an electron cloud cluster signal and transmitting the electron cloud cluster signal to an external readout electronics system for processing.

The invention discloses a coal-fired boiler combustion instability monitoring method and system based on multi-parameter fusion, and the method comprises the steps: constructing a hearth flame imaging system which comprises an image detector, a lens, a stainless steel cavity and a cooling air channel; the flame image intensity is converted into radiation intensity through blackbody furnace calibration, and the flame temperature and emissivity are calculated based on the Planck law; extracting flame characteristic parameters including average radiation intensity, temperature, emissivity and standard deviation thereof; constructing a load-flame characteristic parameter model, and predicting parameter reference values under different loads through multiple linear regression; and calculating a combustion instability index CII, carrying out weighted fusion on the normalized deviation of the real-time measured value and the predicted value, and judging that CII is equal to 1 when the flame area is 0 or the average temperature is lower than 900 DEG C. The flame radiation image and the unit operation parameters are fused, and the limitation of traditional single-parameter monitoring is solved; combustion instability dynamic quantitative evaluation is achieved through the CII index, and the method is suitable for early warning of the deep peak regulation working condition.

A dental X-ray imaging system (100) comprises: a dental X-ray imaging unit (102) having an X-ray source part (114), an X-ray imaging detector part (116) with an X-ray detector, and a gantry part (112) for the X-ray source part (114) and the X-ray imaging detector part (116); and a control system (106). The control system (106) controls the parts of the dental X-ray imaging unit (102) to acquire an X-ray scout image (302) of the patient (300) by using a first, larger part of an active area of the X-ray detector, and to acquire panoramic dental X-ray image data of the patient (300) by using a second, smaller part of the active area of the X-ray detector being respective to the panoramic imaging. A method for a panoramic dental X-ray imaging of a patient (300), a computer program (714), and a tangible non-volatile computer-readable medium are also disclosed.

A calibration target for use with a radiographic image detector includes a target body securable to the image detector and a plurality of radiopaque linear markers, e.g. wires, fixed to the target body, wherein access to the image detector by incident radiation is at least partially blocked by the plurality of linear markers. By using the geometric properties of wires and advanced detection techniques, a precise calibration suitable for high-quality, volumetric three-dimensional CT reconstruction from biplanar X-ray images is achieved.

The utility model provides a nanoscale precision machining surface integrity detection device for precision machining, which belongs to the technical field of detection devices and comprises a machine body, a platform is arranged in the machine body, a rotating mechanism is arranged in the platform, and the rotating mechanism comprises a mounting seat, a driving motor, a speed reducer, a rotating rod and a turntable. According to the utility model, through the arrangement of the rotating mechanism, the placing disc can rotate orderly, the workpiece on the placing disc can be rapidly detected by matching with the use of an image detector, and through the arrangement of the clamping mechanism, the workpiece is kept stable in the detection process and is prevented from moving or rotating in the detection process, so that the detection efficiency is improved. The safety of the whole detection process can be ensured, the image detector can be driven to sweep or move on the to-be-detected surface of the workpiece through the arrangement of the first moving mechanism and the second moving mechanism, and it is ensured that the image detector can cover all the to-be-detected surfaces of the workpiece.

A counterbalanced imaging device is provided and includes an imaging source and an imaging detector. The counterbalanced imaging device also includes a gantry ring that physically supports the imaging source and the imaging detector. The gantry ring also enables the imaging source and the imaging detector to simultaneously rotate about a center of rotation. The gantry ring may also comprise a detachable segment having one or more counterbalance measures contained therein to align a center of gravity of the gantry ring with the center of rotation when the detachable segment is mounted onto the gantry ring.

The invention relates to the technical field of non-contact temperature measurement, in particular to a transient temperature field measurement method, system and device and a medium, and the transient temperature field measurement method comprises the steps: synchronously collecting an original spectral signal and an original grayscale image of a transient temperature field; discretization processing is carried out on the corrected spectrum, a theoretical radiation spectrum corresponding to each temperature element is obtained, an image gray value-radiation brightness mapping relation is established, and temperature element weight initial distribution is obtained; optimizing by using an optimal solution algorithm to obtain an optimal temperature primitive weight; and inverting the temperature field by using the optimal temperature primitive weight and the histogram of the original grayscale image to obtain a final fusion image of the transient temperature field. According to the method, the dynamic reconstruction of the two-dimensional temperature field of the explosion fireball is realized by constructing the temperature primitive model and combining nonlinear least square optimization and image mapping of the image detector, and the problems of large single-point inversion error and low spatial resolution of the transient high-temperature field are solved.

An agricultural machine includes a vehicle, an image detector, memory, a processing circuit, and a steering control unit. The vehicle has at least one agricultural implement affixed thereto. The image detector is mounted to the vehicle and is configured to generate first image data. The memory stores at least a first trained model of a crop row detection neural network. The processing circuit is configured to generate a crop row prediction image using the first image data, the first trained model, and a convolutional neural network. The processing circuit is further configured to generate navigational parameters based at least in part on the crop row prediction. The steering control unit is configured to control movement of vehicle based on the navigational parameters.

The invention discloses a multi-wavelength laser collimator based on radial shearing. The multi-wavelength laser collimator comprises a near-field reference, a telescope objective combination, a bifocal objective and an image detector which are sequentially arranged along a light path. Aberration-free imaging of near-field light beams is achieved through a bifocal objective lens, and meanwhile far-field pointing is detected through coaxial shearing interference generated by means of amplitude light splitting. A single non-mobile sampling detection light path and a single detection sensor are used to realize simultaneous acquisition of near-field position information and far-field pointing information of a laser beam; the light spot position deviation and the fringe translation amount are analyzed through a computer, and high-precision collimation is achieved through a feedback control system. And the detection of the angle direction of the laser beams with various wavelengths can be realized by using a radial shearing interference technology. The device breaks through the limitation of traditional double-optical-path collimation, has the characteristics of simple structure, strong anti-interference performance, multi-wavelength applicability and the like, remarkably improves the collimation precision, reduces the cost, and has important application value in the field of laser precision collimation.

An X-ray imaging device emits an X-ray to irradiate an object and includes an object moving mechanism that rotates the object; an X-ray image detector to detect a projection image of the object; an object temperature adjusting mechanism configured to change a temperature of the object; and a processing unit configured to acquire a cross-sectional image of the object by a reconstruction calculation from the projection images detected by the X-ray image detector by rotating the object. The processing unit is acquires a plurality of cross-sectional images and of the object captured at a plurality of different temperatures T1 and T2, and divides an inside of the object into regions for each of substances using a distribution of pixels of each of the cross-sectional images based on CT values obtained at the plurality of temperatures T1 and T2 at which the cross-sectional images of the object are acquired.

The invention discloses a coding LED illumination light source and an active hyperspectral imaging system, and effectively overcomes the defects of insufficient luminous flux and low signal-to-noise ratio in the current active hyperspectral imaging system based on the LED illumination light source. The system comprises an LED control module, an LED light-emitting module, a heat dissipation module, a focusing and dodging module, an imaging lens, an image detector, a computer and the like. The method is characterized in that coding illumination is carried out through a plurality of LEDs with different wavelength combinations based on a spectrum calculation principle, the illumination intensity of the active hyperspectral imaging system is multiplied, and the signal-to-noise ratio and the sampling speed of the system are improved. The invention provides a novel active hyperspectral imaging mode which can effectively meet the application requirements in different scenes such as high-resolution microscopic hyperspectral imaging and video-level high-speed hyperspectral imaging.

The invention relates to the technical field of image processing, and particularly provides a multifunctional image generation device and an image generation method.The multifunctional image generation device comprises an FPGA, a DSP, an optical fiber module, a Cameralink video coding chip, a PAL video coding chip, an SDI video coding chip, a control key, MAX3490, a DDR and a crystal oscillator; and the image data is transmitted to the image coding chips corresponding to the images of the different systems according to the time sequences of the images of the different systems, and the images of the different systems are obtained through conversion in a synchronous transmission mode. The device can be applied to a computer with a PCIE interface, can generate and output same images of different standards or different images of different standards at the same time, and can also be independently used without the computer to generate target images of specific sizes and contrast ratios, so that the use flexibility of the whole device is improved, and the use cost is reduced. The method can be applied to evaluation and detection of image target tracking equipment and simulation of video output of an image detector.

The invention discloses a lightweight polarization television imaging assembly and a video image processing method thereof, the imaging assembly adopts a system architecture composed of an FPGA processing board, a detector board, a lens and a shell structure, and the detector board comprises four image detectors, a detector power management circuit and an interface circuit. Polarizing films in different directions are respectively pasted on each detector, and the angles are respectively 0 degree, 45 degrees, 135 degrees and 90 degrees. According to the video image processing method, the four image detectors are utilized, the miniaturization and autonomous controllable functions of the polarization detectors are achieved, all detection original images and solved polarization information images are reserved, and real-time switching of polarization multi-dimensional images is achieved.

A projection apparatus (102) for image projection of an image on a subject (114). The apparatus (102) includes an image detector (104) having a detector field of view, where the image detector (104) is configured to detect an input image of the subject 5 (114). The processor (204) is configured to generate an output image based on the input image, where the output image includes content representing at least a portion of the content of the input image. An image projector (106) has a projector field of view, where the projector field of view overlaps the detector field of view, and where the image projector (106) is configured to project the output image on a target surface (208) 10 of the subject (114).

Phishing protection utilizes a security identifier displayed in association with secure content. The identifier may be displayed separately for comparison. A security identifier may be generated by a user interface, local source, or remote source. Users may visually and / or physically confirm identifiers. An identifier may be a character string or QR code. Phishing attempts may be monitored, detected, and alerted during and outside a secure session. A device may modify images from a first computing device to a display monitor. A device interface may receive a first image from the first computing device. A detector may monitor the first image for counterfeit information. An alert generator may generate a security alert for counterfeit information. A combiner may combine with the first image, in response to a secure session, a secure image associated with a secure identifier and, in response to the detector detecting counterfeit secure information, the security alert.

The application belongs to the technical field of photon imaging detection, and particularly relates to a photon counting imaging detection system based on a mixed anode. The system comprises a vacuum sealed tube detector composed of a window coated with a photocathode, a microchannel plate stack and a mixed anode, and a signal processing circuit. The photocathode is used for converting photons incident through the window into photoelectrons. The microchannel plate stack is used for converting the photoelectrons into electron clouds. The mixed anode comprises a strip anode and a delay line anode arranged orthogonally, and the mixed anode transmits the collected charge short pulses of each channel to the signal processing circuit. The signal processing circuit calculates the two-dimensional coordinates of the photons based on the collected charge short pulses of each channel, and then transmits the two-dimensional coordinates of the photons to a terminal for imaging display. The application provides a photon counting imaging detection system based on a cross strip-delay line mixed anode, and solves the problem that the existing position sensitive anode detector cannot simultaneously have high spatial resolution and high temporal resolution.

Method of operation of an image sensor comprising a medium (15) including at least one photosensitive material (19; 191) capable of generating charges (190) by photoelectric effect when the sensor is exposed to incident light, and collection electrodes (181) in contact with said medium (15) associated with pixel circuits, method in which at least one electric field including at least one lateral component is created to collect said charges (190) on at least one of said collection electrodes (181), enabling their reading by the associated pixel circuit, in which said electric field is generated by creating at least one potential difference between said collection electrode (181) and at least one other area of ​​the sensor, raised to a different potential, this other area being located between at least two collection electrodes (181).

The invention relates to a dental X-ray imaging system (100) for dental X-ray imaging of a patient (300). The system (100) comprises: a dental X-ray imaging unit (102) comprising: an X-ray source portion (114), an X-ray imaging detector portion (116) comprising one X-ray detector, and a gantry portion (112) comprising the X-ray source portion (114) and the X-ray imaging detector portion (116); and a control system (106). The control system (106) is configured to: control the portion of the dental X-ray imaging unit (102) to acquire an X-ray localization image (302) of the patient (300) by using a first portion of an active area of the X-ray detector; and control the portion of the dental X-ray imaging unit (102) to acquire panoramic dental X-ray image data of the patient (300) by using a second portion of the effective area of the X-ray detector corresponding to panoramic imaging. The first portion of the active area is larger than the second portion of the active area. The invention also relates to a method for panoramic dental X-ray imaging of a patient (300), a computer program (714) and a tangible non-volatile computer readable medium.

The application provides a point target wide-area high-precision positioning method, device and equipment combined with imaging model fine and coarse calibration, relates to the technical field of optical imaging precision measurement, and aims to realize point target wide-area high-precision positioning. The method comprises the following steps: collecting point target images located at different sub-pixel positions, calibrating the PSF of a first pixel on an image detector to obtain a reference PSF model; mapping the reference PSF model to a second pixel and fitting the imaging data of the second pixel to obtain an extended PSF model; wherein the extended PSF model represents the pixel response values corresponding to different positions of the center of the image spot from the center of the pixel; and positioning the wide-area point target images collected by the image detector by using the extended PSF model and the maximum likelihood method to obtain a positioning result.

The utility model relates to the field of X-ray perspective machines, and discloses an X-ray perspective machine capable of perspective at any angle, which comprises a mounting plate and a first mounting frame, vertical plates are fixedly connected to two sides of the front end of the upper surface of the mounting plate, a first servo motor is arranged on one side of the front end of the upper surface of the mounting plate, and a second servo motor is arranged on one side of the front end of the upper surface of the mounting plate. An output shaft of the first servo motor is fixedly connected with an adjusting threaded rod, and the side, away from the first servo motor, of the adjusting threaded rod penetrates through the vertical plate on one side and is rotationally connected with the vertical plate on the other side. According to the utility model, through cooperative use of the first servo motor, the second servo motor, the third servo motor and the fourth servo motor, a worker can conveniently adjust the position of the clamping block clamping a detected electronic component between the X-ray tube rack and the flat plate image detector; therefore, the detected electronic component can be observed from different angles in a perspective manner, and the accuracy of the detection result is improved.

The invention relates to the technical field of photoelectronic imaging, in particular to a snapshot spectrum camera shooting device and method.The device comprises an imaging modulation device, an acquisition device and a computing device.The imaging modulation device comprises an imaging lens, an optical filter array and a spatial modulation device; the optical modulator is configured to generate an optical signal with modulation at an image plane position of an imaging lens; the acquisition device comprises a two-dimensional image detector configured to convert an optical signal into image data and / or video data to generate a measurement image and / or a measurement video; and the computing equipment is connected with the acquisition equipment, and is configured to read and store the measurement image and / or the measurement video from the acquisition equipment, and invert the spectral image and / or the spectral video of the target scene from the measurement image and / or the measurement video. Therefore, the problems of difficulty in improving the spatial resolution, high cost and the like caused by exponential increase of on-chip encoder device cost and process complexity when pursuing higher spatial resolution in related technologies are solved.

Methods, apparatus, systems and articles of manufacture are disclosed. An example apparatus includes a thermal image detector to determine a heat blob count based on a frame of thermal image data captured in the media environment, an audience image detector to identify a face of an audience member based on a frame of audience image data captured in the media environment, the frame of audience image data corresponding to a field of view associated with at least one heat blob included in the heat blob count, and a people meter controller to cause a people meter, which is to emit a prompt for audience identification information, not to emit the prompt for at least a first time period after the audience member is identified.

Disclosed herein is a device (1) for inspecting a material (M), in particular leather, comprising a working plane (2) adapted to provide a support plane for the material (M), a control unit (C) adapted to manage the device (1), an illumination system (15) adapted to illuminate the material (M) on the working plane (2), and at least one image detector (30) adapted to capture an image of the material (M) on the working plane (2). The control unit (C) is configured to process the image captured by the image detector (30) and to generate a digital copy of the material (M) to be inspected wherein the apparatus (1) further comprises a stretching tool (10) configured to apply a stretch to the material (M) arranged on the working plane (2) such that defects can be identified even on the material (M) in the stretched state. (Figure 1)

The utility model discloses an automatic rod coil assembling and detecting production line which comprises transfer jig conveying belts at the upper end, the lower end and the right side end, magnetic core assembling machines are arranged above the two sides of the transfer jig conveying belt on the right side, and a mechanical arm is arranged between a winding machine and the magnetic core assembling machines. The transfer jig conveying belt at the lower end penetrates through the drying furnace and then reaches the image detector on the left side; the tray placing area is arranged at the upper end of the left side, and the tray placing robot is arranged between the tray placing area and the image detector. The utility model has the advantages that the coil cannot be damaged when falling off, and the relative position of the coil and the magnetic bar cannot be changed during drying; in addition, the magnetic bar can be inserted into the coil while changing shaking, and interference between the magnetic bar and the coil is prevented; in addition, a two-time positioning method is adopted, so that the accuracy of the coil insertion position is ensured.

The present invention discloses an indoor positioning method and an indoor positioning device. The indoor positioning method comprises: setting a characteristic coding pattern indoors, the characteristic coding pattern comprising a plurality of coding points and a plurality of characteristic points; obtaining a captured image containing the characteristic coding pattern, and determining the shooting focal length, shooting pitch angle and shooting roll angle of the captured image; identifying a plurality of coding points in the characteristic coding pattern on the captured image, and determining the spatial coordinates of each characteristic point in the characteristic coding pattern in the indoor according to the plurality of coding points in the characteristic coding pattern; obtaining the projection coordinates of each characteristic point on an image detector for capturing the captured image; based on the shooting focal length, shooting pitch angle, shooting roll angle and the spatial coordinates and projection coordinates of each characteristic point, the indoor positioning information of the image detector is obtained by adopting the imaging principle of a monocular camera. By adopting the present invention, positioning can be completed by only collecting a single characteristic coding pattern, which reduces the complexity and power consumption of image processing.