127 results about "Spatial filter" patented technology

The invention relates to the technical field of defect detection, in particular to a defect detection method and system based on a microwave frequency crystal resonator, and the method comprises the steps: forming a microwave probe through a microwave frequency crystal resonator array, placing a to-be-detected material below the microwave probe, and setting a scanning area and scanning step lengths in two directions on the surface of the material; controlling the probe to perform point-by-point scanning according to step length, and collecting a plurality of reflection coefficients of each sampling point to form an echo signal matrix; performing singular value decomposition on the matrix, applying an adjustable coefficient to a first singular value and a second singular value, and adaptively selecting an optimal coefficient according to imaging quality to reconstruct an echo signal; performing two-dimensional Fourier transform on the reconstructed matrix, constructing a spatial filter in combination with probe spacing and defect depth to perform phase compensation, performing two-dimensional Fourier transform to obtain a defect image, and performing threshold segmentation on the defect image to obtain a binary image only containing defects; and analyzing the connected regions to obtain the gravity center position of each defect and the defect area determined by the pixel number and the single pixel area. The problems of serious clutter interference, insufficient defect imaging contrast ratio, difficulty in quantitative evaluation of defect size and the like in the existing microwave detection can be solved.

Apparatus, methods, and computer program products for wireless communication with beam prediction are provided. An example method may include transmitting, for a second network entity, capability information indicative of one or more capabilities associated with at least one panel of the first network entity. The example method may further include predicting a spatial filter change associated with the at least one panel of the first network entity. The example method may further include transmitting, for the second network entity, spatial filter change information indicative the spatial filter change associated with the at least one panel. The example method may further include communicating with the second network entity based on the spatial filter change.

Certain aspects of the present disclosure provide techniques for obtaining a physical random access channel (PRACH) configuration indicating one or more sets of preambles or random access channel occasions (ROs) for one or more candidate quantities of PRACH transmissions; and sending a quantity of PRACH transmissions, of the one or more candidate quantities of RACH transmissions, on a group of ROs from the set of ROs or using a set of preambles corresponding to the quantity of PRACH transmissions using a set of spatial filters, wherein the group of ROs are associated with the set of spatial filters.

The invention relates to the technical field of laser radars, in particular to a vortex light laser radar which comprises a laser emitting unit, an optical receiving unit, an optical modulation unit, a signal detection unit, a signal acquisition and processing unit and a system structure unit. The optical receiving and modulating module divides echo light into a vortex channel and a reference channel through polarization beam splitting. The vortex channel performs orbital angular momentum modulation on echo light by using the receiving modulation unit, converts coherent signal light into annularly distributed vortex light, and filters incoherent noise light through the OAM spatial filtering assembly, thereby realizing spatial separation of signals and noise. The problem of interference of multiple scattered light and background light in a strong scattering medium is effectively solved, the detection signal-to-noise ratio, the maximum detection distance and the target resolution of the laser radar are remarkably improved, and the system is compact in structure, high in engineering practicability and particularly suitable for target detection in underwater, haze and other complex environments.

This application discloses a method, apparatus, and storage medium for defect extraction from display screen images, aimed at reducing the decrease in defect detection accuracy caused by shadows. The method involves: acquiring a display screen image and determining the target region; performing image segmentation accuracy analysis on the display screen image; correcting the display screen image; generating four dynamic array coordinate arrays for the target region and performing shadow removal processing based on these arrays to generate a shadow-free display screen image, where the four dynamic array coordinate arrays are the final row and column arrays of the individual segmented image regions; performing interpolation calculations on the pixels in the corner regions of the shadow-free display screen image; constructing an adaptive spatial filter kernel matrix and performing convolution enhancement operations between the adaptive spatial filter kernel matrix and the shadow-free display screen image; performing threshold control processing on the shadow-free display image and integrating the defect region through grayscale morphological processing; and extracting and analyzing defect features from the shadow-free display image.

The application relates to the technical field of spectral analysis, and discloses a fluorescence spectral analysis device and method based on a solid-state electron spin ensemble, wherein the spectral analysis device comprises a laser modulation unit, a confocal unit and a fluorescence processing unit; the laser modulation unit comprises a laser, a Griesinger-Taylor prism, an acousto-optic modulator, a beam expander, a collimating lens, a spatial light modulator, a spatial filter and a half-wave plate which are sequentially arranged; the confocal unit comprises a dichroic mirror, a focusing lens, a diamond and a microwave antenna which are sequentially arranged; the diamond has a solid-state electron spin NV color center; and the fluorescence processing unit comprises a filter group, a sleeve lens, a lens, a linear polarizer, a Bertin lens and a camera which are sequentially arranged. The application distinguishes the fluorescence generated by different axial NV color centers from the fluorescence level, and provides a thought and method for the miniaturization and bias magnetic field removal of a quantum detection device of the NV color center.

Disclosed are methods, apparatuses, and systems for resource selection in a sidelink communication. One of the methods includes: determining, by a user equipment (UE), a spatial filter configuration, the spatial filter configuration being associated with a first time period: collecting sensing information obtained using the spatial filter configuration, the sensing information including at least one of: sidelink resource reservation information, or at least one sidelink reference signal received power (SL-RSRP) measurement of the sidelink communication: determining one or more candidate resources based on the sensing information: selecting one or more resources from the one or more candidate resources for transmission: re-evaluating using the spatial filter configuration, the selected one or more resources; and determining, based on a result of the re-evaluating of the selected one or more resources, whether a re-selection of the one or more resources is triggered.

The invention discloses a system and a method for lossless dynamic measurement of microstructure characteristics of a material surface, and relates to the technical field of optical measurement, and the method comprises the following steps: S1, placing an object to be measured on a two-dimensional stepping motor platform, and adjusting the platform to be horizontal; and starting the solid laser. According to the invention, an optical system composed of a solid laser, a beam expander, an aperture diaphragm and a spectroscope generates an accurate detection light beam, a spatial filter designed according to a confocal diffraction limit is matched to effectively suppress defocus stray light interference, and a multi-parameter fusion judgment mechanism is combined to synchronously extract a light intensity peak value and a light spot centroid offset, so that the detection accuracy is improved. The focus is judged only when the light intensity reaches the maximum value and the mass center offset is smaller than the threshold value, the positioning precision is greatly improved, Z-axis coordinate errors are dynamically corrected through real-time vibration compensation and thermal drift compensation, the problems of sample damage and optical method noise interference in traditional contact measurement are solved, and undistorted data support is provided for microstructure three-dimensional reconstruction.

The application discloses a kind of optical fiber side light extraction structure and method, belong to optical fiber side light extraction technical field, structure has including femtosecond grating light extraction component, filter component including filter layer and with slit light shielding layer, and detection component.The method includes: with grating diffraction separation optical signal in fiber core, with filter component filters optical signal, with detector receives signal.The application is by femtosecond laser in fiber core and writes small refractive index modulation area, with diffraction effect will transport light be introduced with specific angle to side, again cooperate external filter and metal slit and constitute spatial filter, physically block the stray light deviating from preset angle.This internal diffraction+external filter synergic mechanism avoids physical damage optical fiber surface, and realizes high purity, high directional signal extraction under micro size.

The application discloses a kind of object surface trace direction measurement methods based on normal vector statistical characteristics, first, the infrared image of four polarized angles of roughness contrast sample block surface is obtained, the polarization parameter of infrared radiation is calculated by solving Stokes vector;Second, select a sample block from roughness contrast sample block and extract the region in the sample block as the measured region;Then 180 space filters containing different direction test lines are established respectively, 180 groups of normal vectors are extracted respectively, and the cosine similarity of all normal vectors and the average value of normal vector on the group of test lines is calculated respectively and the average value is taken;Finally, the average cosine similarity of normal vector in different directions is obtained in turn, and the trace direction of the object is obtained according to the maximum value of the average cosine similarity of normal vector in different directions.The application greatly reduces the subjective error of trace inspection staff compared with the traditional measurement method, and the polarization detection equipment has low cost and simple measurement system arrangement, and is more suitable for actual working condition environment.

A UE is configured to receive a first indication to predict characteristics of interference and noise for a first interference prediction target based on a first transmission spatial filter and paired with a channel measurement resource (CMR) having a second transmission spatial filter, wherein the first interference prediction target is a valid prediction target based on prior model training for a pair that includes the CMR and an interference measurement resource (IMR) associated with the first interference prediction target. The UE is configured to predict the characteristics of interference and noise for the first interference prediction target using a model that is trained with a first measurement of the IMR having the first transmission spatial filter and obtained based on a Type D quasi co-location (QCL) relationship with the second transmission spatial filter.

A system and method for identifying container numbers on front-mounted cranes are disclosed, relating to the field of container number identification on front-mounted cranes. To address the shortcomings of existing methods, such as inability to adapt to rainy or snowy weather and low-light conditions, poor container number identification performance, and poor anti-interference capabilities, this invention acquires video or images of containers on front-mounted cranes; extracts continuous frames from the video at a fixed frequency and performs grayscale processing on each frame to reduce computational complexity; applies temporal filtering to the preprocessed video / image; applies spatial filtering to the filtered video / image to remove isolated noise points; reduces high-frequency noise and smooths the image through weighted averaging; enhances image contrast by adjusting the grayscale distribution of the image, making the container number area clearer; and performs container number area detection and character recognition on the processed image to achieve automatic container number identification. This invention is mainly used for identifying container numbers on front-mounted cranes.

A communication method includes: a terminal device acquires a measurement result for a first signal. The measurement result is used for determining a timing advance value of a first cell and / or a first spatial filter, and the first signal is a downlink reference signal related to a second cell and / or a second spatial filter.

The application relates to an infrared image small target tracking method and system based on image local enhancement and a 3D sparse convolution network, and relates to the technical field of infrared small target tracking detection. In order to solve the problem that the target features of current infrared small targets are not obvious and the background is complex and difficult to detect, and to improve tracking precision and shorten tracking time, the application comprises the following steps: (1) enhancing the infrared target and suppressing the background by subjecting the infrared image to an image space filter; (2) generating sparse data by subjecting the enhanced infrared image to sparse sampling; (3) stacking the sparse data into a three-dimensional tensor according to the time dimension; (4) performing data enhancement on the three-dimensional tensor by cutting, superimposing and rotating; and (5) extracting a track by subjecting the input sparse data to segmentation by using a 3D sparse convolution network. The application can track the infrared small target with occluded track under the condition that there is no initial position marker and the background is complex, and the tracking precision is high.

The application discloses a roughness anisotropy parameter measurement method based on normal vector statistical characteristics, which comprises the following steps: firstly, acquiring infrared images of a roughness contrast sample block at four polarization angles, and calculating polarization parameters of infrared radiation by solving Stokes vectors; secondly, selecting a sample block from the roughness contrast sample block and extracting an inner region of the sample block as a to-be-measured region; thirdly, establishing 180 spatial filters respectively containing test lines in different directions, extracting 180 groups of normal vectors, respectively, and calculating cosine similarity of all normal vectors on the test line and the average value of the normal vectors and taking the average value; and finally, sequentially acquiring average cosine similarity of the normal vectors in different directions, and obtaining roughness anisotropy parameters of the measured surface according to a two-dimensional fabric tensor model. The application has the advantages of high reliability, non-contact and accurate feature extraction, and meanwhile, an infrared polarization detection device is small in size, light in weight and simple in measurement system arrangement, and is more suitable for actual working conditions.

The present application provides a communication method and a communication apparatus. The method comprises: receiving indication information, the indication information being used for a spatial filter update indication; receiving or re-receiving at least one reference signal; and on the basis of the at least one reference signal, determining or re-determining a spatial filter corresponding to an uplink physical channel, a downlink physical channel and / or a reference signal. The technical solution provided in the present application can improve the accuracy of beam pointing in a communication system.

A system, apparatus, and method for processing an image based on color constancy are provided herein. The method comprises the following steps: obtaining an image in a first color space; converting the image into data in a second color space; transforming the data using color adaptation; performing a first normalization on the transformed data, wherein the first normalization includes applying a dynamic spatial filtering technique to adjust the transformed data based on the light intensity; applying a set of filters to the normalized data, wherein the set of filters are convolved based on the normalized data associated with the image; performing a second normalization on the filtered data to obtain an illumination estimate of the image related to the filtered data; and outputting normalized data from the second normalization, where the normalized data maintains color constancy based on the illumination estimate, thereby removing illumination from the normalized data.

Systems and methods for operating phased arrays are described. A circuit can receive an index associated with an antenna among a plurality of antennas in a phased array. The circuit can use the index to identify at least a phase value and a gain value of a known beam. The circuit can receive at least one static configuration of the antenna and at least one beam transformation parameter. The circuit can transform, based on the at least one beam transformation parameter and the at least one static configuration, the phase and gain values of the known beam into phase and gain values of a desired beam. The circuit can map the phase value of the desired beam to a phase shifter setting of the antenna and the gain value of the desired beam to a variable gain amplifier setting of the antenna to generate the desired beam.

The application provides a wharf docking method based on visual and laser radar fusion perception, a medium and equipment. The target pixel position of the docking and berthing area in a visual image can be determined according to the collected visual image. Then, the first coordinate of the center point of the docking and berthing area in a laser radar coordinate system is determined according to the target pixel position, the collected laser point cloud and a spatial filter. The first coordinate is subjected to coordinate conversion to obtain the second coordinate of the center of the docking and berthing area in a wharf coordinate system. The target joint parameters of the wharf are determined according to the second coordinate. The motion trajectory of the wharf is determined according to the target joint parameters. The motion trajectory is sent to a wharf control device to enable the wharf control device to perform corresponding wharf motion, so that the wharf is automatically guided and docked, the operation complexity of the wharf is reduced, the safety problems caused by limited field of view and improper operation of the operator are avoided, and the stability and accurate control in the automatic guiding process of the wharf are realized.

The invention discloses a DMD-based time division multiplexing common-path dual-wavelength digital holographic imaging system and a DMD-based time division multiplexing common-path dual-wavelength digital holographic imaging method, and relates to the field of dual-wavelength digital holographic imaging. The invention solves the problems of environmental sensitivity and coherent noise influence on measurement precision caused by lengthy dynamic measurement record and complex interference structure in dual-wavelength digital holographic imaging, and adopts the technical scheme that a digital micro-mirror device is used for rapid overturning, and two paths of light sources with different wavelengths irradiated on the digital micro-mirror device are rapidly switched, so that the measurement precision is greatly improved. An interference image is obtained through a polaroid, an objective table, a microscopic imaging system, a transmission type diffraction grating and a confocal spatial filtering system; according to the invention, high-speed acquisition of two-wavelength interferograms is ensured, the time resolution of measurement is remarkably improved, the problem that phase recovery data is difficult to separate when dual-wavelength illumination is carried out simultaneously is avoided, and common-path interference and partial coherent light illumination are combined, so that the space-time phase sensitivity of measurement is greatly improved.

The embodiment of the invention belongs to the display technology, and provides display equipment, and the display equipment comprises a display module which comprises a display screen, a backlight assembly and a time schedule controller; the backlight driving module drives the backlight assembly to emit backlight; the processor is used for receiving image data of at least one frame of image, dividing the frame of image and acquiring at least two areas included in the frame of image; according to the image data of the one-frame image, determining a brightness value and a spatial filtering parameter corresponding to any region included in the one-frame image, the spatial filtering parameters of at least two regions being different; and according to the spatial filtering parameter corresponding to any region included in the frame of image, filtering operation is performed on the region to obtain a target brightness value corresponding to the region, and the filtering operation comprises performing spatial filtering processing on the brightness value corresponding to the region based on the spatial filtering parameter. According to the invention, different spatial filtering parameters are adopted to process different areas of one frame of image, so that the image display effect is improved.

A method, system and apparatus for network-sided inference of beam pair prediction using uplink reference signaling (UL-RS) are disclosed. According to one aspect, a method in a wireless device (WD) includes determining a mapping between M beams corresponding to M spatial filters of the WD and M beam identifications (IDs), M being an integer greater than zero. The method also includes receiving a configuration of uplink reference signals. The method further includes transmitting N uplink reference signals of the received configuration in N beams of the M beams, N being an integer not greater than M.

Embodiments include methods for a user equipment (UE) configured for operation in a wireless network. Such methods include receiving a configuration of at least first and second resource sets. Each resource set includes multiple reference signals associated with corresponding multiple spatial filtering configurations. Such methods include performing measurements on the reference signals of the first and second resource sets and sending, to the wireless network, a beam report including the measurements arranged in at least first and second groups. Each group includes measurements performed on a first reference signal from the first resource set and on a second reference signal from the second resource set. The first and second reference signals are received concurrently by the UE. One measurement included in the first group is expressed as an absolute value, while others in the first group are expressed as differential values relative to the absolute value.

A wireless transmit / receive unit (WTRU) receives configuration information for a first low power synchronization signal (LP-SS) and a set of candidate LP-SSs. The first LP-SS and the set are associated with a low-power-wake-up signal (LP-WUS). The WTRU determines a spatial filter for receiving the first LP-SS, and receives the first LP-SS. The WTRU measures a low-power reference signal received power (LP-RSRP) of the first LP-SS. On a condition that the LP-RSRP of the first LP-SS is below a threshold, for each candidate LP-SS the WTRU: determines a spatial filter; receives the candidate LP-SS; and measures an LP-RSRP for the candidate LP-SS. On a condition that the LP-RSRP of all of the candidate LP-SSs in the set are below a threshold, and that a time duration until a next active time is equal to or higher than a time threshold, the WTRU transmits information indicating an out of range status.

Aspects presented herein may enable a UE to determine QCL information and / or a spatial filter for non-dedicated channel and / or signal based on a unified TCI indication from a base station. In one aspect, a UE receives a TCI state indication in association with a communication of at least one non-dedicated DL channel or non-dedicated DL signal. The UE determines QCL information for the communication of the at least one non-dedicated DL channel or the non-dedicated DL signal based on one or more source reference signals for the received TCI state indication. The UE receives the at least one non-dedicated DL channel or the non-dedicated DL signal based on the received TCI state indication and the determined QCL information.

This invention discloses an adaptive spatial filtering method to reduce the false alarm rate in laser ranging. An adaptive spatial filtering module is introduced into the laser ranging system. A real-time sky background noise acquisition module detects changes in sky background light intensity and feeds this information back to the control system for immediate response. Based on the acquired control signals, a receiving field-of-view control module enables automatic control of a series of mechanisms and circuits. A variable aperture with adjustment function limits the background noise entering the laser ranging system; when the background light radiation intensity is high, the aperture diameter decreases, and vice versa. This design is simple in structure, easy to operate, stable, and highly automated. It not only balances the system's target acquisition capability and noise suppression capability but also has good adaptability, allowing for real-time, intelligent, and efficient adjustment of system structural parameters according to observation conditions, thereby improving system stability and automation.

A processing method for measurement is performed by a terminal device and includes: receiving measurement indication information, the measurement indication information being used to indicate that measurement is to be performed on spatial filters in one or more measurement sets to obtain measurement results; where the measurement results are used to predict link qualities of spatial filters in one or more prediction sets to obtain prediction results.

Systems and methods of probing a beam process are provided. In some embodiments, a method performed by a user equipment (UE) for evaluating a candidate beam pair link includes indicating support for sounding uplink (UL) reference signals (RS) during capability signaling; determining a spatial filter for UL-RS transmission based on one or more downlink (DL) reference signals (DL-RSs); the spatial relationship of the UL-RS is updated; and transmitting the UL-RS directly without the need for explicit spatial relationship updates to the UL-RS from the network node. In this way, some embodiments enable the network to evaluate candidate beam pair links based on UL-RS transmissions of the UE without the need for explicitly indicating a spatial filter that the UE should be used for UL-RS transmissions. Some embodiments describe several solutions on how to perform a method with reduced UL-RS overhead by having the UE help when to trigger UL-RS transmissions.

A light source system is disclosed, the system comprises: a multimode laser unit; a first lenslet array positioned in a path of said laser beam and configured to form an array of focused spots in a selected plane downstream of said first lenslet array; a spatial filter mask carrying an array of pinholes positioned in said selected plane; a second lenslet array having spatial arrangement of lenslets similar to the first lenslet array and positioned such that said spatial filter mask is in a back focal plane of said second lenslet array, thereby collimating laser light from the array of focused spots into a corresponding array of beamlets; and a third lenslet array positioned downstream of said second lenslet array, configured for focusing said array of beamlets to form an output spot array at an exit pupil of said light source system.