47 results about "High resolution imaging" patented technology

The application discloses a kind of multiscale unmanned aerial vehicle image monitoring crop growth methods and systems, belong to agricultural remote sensing and intelligent monitoring technical field.The method of the present application comprises: controlling unmanned aerial vehicle to collect target area low-resolution remote sensing image at first height;Based on first identification model, crop land boundary is extracted and divided into multiple grids;The health index of each grid is calculated, and the center point of the abnormal grid is located based on the statistical threshold value;Control unmanned aerial vehicle to descend to second height and fly to the top of abnormal grid to carry out leaf scale high-resolution imaging;High-resolution image is input into second identification model, and output fine diagnosis results such as water shortage, lack of fertilizer, disease and pest.The present application realizes the organic combination of large-scale rapid screening and local accurate diagnosis through two-level scale cooperative monitoring, greatly improves the efficiency and accuracy of crop growth monitoring, and is suitable for field crop automation, intelligent growth management.

This invention relates to the field of AR device technology, providing an AR optical lens and an AR device. The lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially along the optical axis from the object side to the image side. The first lens has positive optical power, with a convex surface on the object side and a concave surface on the image side; the second lens has positive optical power, with a convex surface on the object side and a concave surface on the image side; the third lens has negative optical power, with both the object side and the image side being concave; the fourth lens has positive optical power, with a concave surface on the object side and a convex surface on the image side; and the fifth lens has negative optical power, with a concave surface on the object side and a convex surface on the image side. All lenses are aspherical lenses. This invention, through a positive-positive-negative-positive-negative optical power arrangement of lenses, can simultaneously correct various aberrations such as spherical aberration, field curvature, and distortion, effectively achieving a large field of view, low distortion, and high resolution imaging effect, enhancing the immersiveness and clarity of AR displays.

The present application relates to the field of optical imaging technology, and particularly relates to a full-depth-range high-lateral-resolution OCT imaging method, system and storage medium based on interference synthetic aperture. The OCT imaging method comprises sample positioning: moving the point spread function of the sample to a region close to 0 optical path; collecting three-dimensional original data; pre-processing the collected three-dimensional original data to obtain complex signals containing amplitude and phase information; performing three-dimensional Fourier transform on the scattering potential distribution based on a synthetic aperture algorithm to obtain frequency domain signals, correcting the nonlinearity of the spatial frequency by interpolation or frequency domain filtering before interpolation, and then performing inverse Fourier transform to reconstruct the spatial distribution of the scattering potential and obtain three-dimensional image data. The detail information of the defocus region is recovered, high-resolution imaging in the full depth range is ensured, and the inherent contradiction between lateral resolution and focal depth is broken through.

The present application relates to the technical field of industrial vision detection and intelligent manufacturing, and in particular provides a papermaking wood grading evaluation method based on 3D vision and high-resolution imaging fusion. The method comprises raw material feeding and pre-screening, and collecting front and back multi-modal information to realize heterogeneous data archiving, establish an initial digital archive of the target physical form; camera alignment and foreground segmentation are performed, and material categories and associated metadata are identified to obtain offline grading evaluation. Through hardware synchronization and algorithm cooperation, the method realizes automatic collection of front and back of wood, calculation of three-dimensional geometric parameters, material classification and grading evaluation, significantly improving detection accuracy, reviewability and automation level.

Improved counterfeit detection in media terminals is provided using a multiple media item validator approach. A first validator analyzes received media items to identify potentially suspect items. Suspect items are routed to a second validator for more detailed analysis, while non-suspect items bypass the second validator. The second validator, equipped with higher resolution imaging and advanced detection capabilities, determines if suspect items are genuine or counterfeit. This selective routing maintains efficient processing while enhancing counterfeit detection accuracy. In an embodiment, additional media item validation features are provided such as substrate validation sensors and lasers for detecting specific security features. In an embodiment, during maintenance periods, the terminal can reprocess stored media items through the validators to resort and recategorize items. This approach improves counterfeit detection, reduces unnecessary rejections, and enhances overall efficiency and accuracy of media handling in terminals.

A compact confocal scanning laser ophthalmoscope comprising a MEMS scan mirror with a compact scan head, for use with small animal subjects. The scan head is connected to the source, detector and control electronics by flexible optical and electrical umbilicals and includes a zoom lens to provide both a wide field of view and high resolution imaging of the retina using a range of imaging modalities.

The utility model discloses a kind of narrow main lobe and low side lobe effect's robust high-resolution beamforming device, including host computer rack, the top of host computer rack is fixedly installed with host computer body, the side of host computer body is equipped with processing equipment, the top of mounting plate is fixedly installed with Jetson Xavier NX development board kit, a kind of narrow main lobe and low side lobe effect's robust high-resolution beamforming device of the utility model, by setting Jetson Xavier NX development board kit, to improve active acoustic imaging resolution capability, on the basis of establishing active detection space-time two-dimensional convolution model, joint azimuth and space two-dimensional deconvolution processing means, realize in angle and time two dimensions on the resolution capability and interference suppression capability of active detection sonar to target are improved;By setting host computer body and processing equipment, array detection software system platform based on CPU and GPU collaborative architecture is constructed, to meet the demand of high-performance computing of complex algorithm for high-resolution imaging sonar beamforming.

This invention discloses a laser phased array ultrasonic composite detection system and method for internal interface defects in GIS insulator metal inserts. The system includes a pulsed laser, an ultrasonic array probe, a control computer equipped with ultrasonic signal acquisition and processing software, and a two-dimensional laser scanning galvanometer. The detection method utilizes a pulsed laser to generate ultrasonic waves on the metal insert side. When the ultrasonic waves propagate to the interface, they are differentiated by the physical mechanism that internal defects completely reflect the ultrasonic waves, while defect-free areas allow ultrasonic waves to pass through. The ultrasonic array probe acquires the ultrasonic signal at the inner wall surface. The computer-controlled two-dimensional laser scanning galvanometer rapidly scans the entire interface of the epoxy resin-metal insert to obtain full matrix data. After the overall scan is completed, the corresponding ultrasonic array probe element is selected, and the computer, with a fixed rotation angle, uses a full-focusing algorithm to perform high-resolution imaging of the interface, thus detecting internal interface defects. This invention reduces the cost of detection equipment while improving the evaluation efficiency of internal defects in the epoxy resin-metal insert interface of GIS insulators.

A sensor arrangement for high-resolution imaging using a common connection between a single-photon avalanche diode (SPAD) and a time-to-digital converter (TDC), comprising: a) a two-dimensional array of SPADs arranged in rows and columns, each SPAD being connected to a quench circuit (QU) that generates a digital pulse for each SPAD event; b) a row connection and a column connection, each QU of the SPAD array being connected to the row and column connections; c) a plurality of TDC channels, each assigned to either a specific row or a specific column of the SPAD array, the TDC channels being driven by a common clock generator and having N stages, and the TDC channels being configured to measure the time interval between the occurrence of a SPAD event and the clock signal;d) Synchronization means to ensure synchronous operation of the TDC channels assigned to the rows and columns of the SPAD array; e) A measuring device for acquiring the measurement results from the TDC channels assigned to the rows and columns of the SPAD array; f) Comparison means for comparing the measurement results from the row and column TDC channels to identify the SPAD source associated with a particular SPAD event; and g) Sorting means for matching the identified SPAD event to the corresponding histogram of the source SPAD.

The invention relates to the technical field of optical engineering, and discloses a handheld laser directional energy system which comprises a Shack-Hartmann wavefront detection system, a visual observation system, an atmospheric turbulence correction system, a laser emission system, a laser ranging system and an anti-shake system. By integrating wavefront detection and adaptive correction, coaxial design, target background difference enhancement through light splitting, MEMS reflector dynamic adjustment, jitter compensation and other technologies, the problems that the imaging quality is interfered by atmospheric turbulence, correction is inaccurate due to system space separation, the contrast ratio of a dark and weak target is poor, aiming is difficult, and jitter miss is caused are solved; the effects of high-resolution imaging, energy concentration, easy target discovery, automatic locking and stable aiming are achieved.

The application discloses a kind of fast high-resolution imaging methods based on vortex electromagnetic wave, which constructs the two-dimensional imaging model of pitch angle and azimuth angle based on concentric circular ring array, realizes low-rank decomposition to the received echo and observation matrix by means of spherical harmonics function, introduces orthogonal matching pursuit algorithm to the scattering point in observation plane for target reconstruction, so as to realize the two-dimensional joint imaging of radar target pitch angle and azimuth angle.The imaging mode of joint OMP algorithm and spherical harmonic decomposition proposed in the application can realize higher imaging resolution compared with the traditional generalized inverse solution mode, while greatly reducing the operation amount of imaging process, effectively saving calculation time.

The application discloses a curved surface array implicit aperture expansion imaging method based on sparse enhanced iterative adaptive processing, belongs to the technical field of array signal processing and beam imaging, and particularly relates to a high-resolution imaging algorithm for a non-planar (curved surface) conformal array. The core realizes accurate beam focusing, sidelobe suppression and robust beam pointing through virtual element expansion and iterative adaptive (IAA) beam shaping technology, and can be widely adapted to various systems such as radars, sonars and radio positioning systems.

A sensor system which integrates metasurface-enabled optical sensing and illumination functionalities for tactile sensing via a sensing interface. The sensor system includes an illumination module including a light source and flat optics for projecting an illumination light (e.g. a pattern) toward the sensing interface, and an imaging module including flat optics and photodetectors for receiving the illumination light reflected or scattered by the sensing interface and capturing related optical signals including images. The captured optical signals are analyzed to detect interactions of an external object with the sensing interface. The disclosed system allows high performance characteristics, including ultra-wide fields of view, high-resolution imaging, and a significantly reduced form factor compared to traditional optical systems.

A sensor system which integrates metasurface-enabled optical sensing and illumination functionalities for tactile sensing via a sensing interface. The sensor system includes an illumination module including a light source and flat optics for projecting an illumination light (e.g. a pattern) toward the sensing interface, and an imaging module including flat optics and photodetectors for receiving the illumination light reflected or scattered by the sensing interface and capturing related optical signals including images. The captured optical signals are analyzed to detect interactions of an external object with the sensing interface. The disclosed system allows high performance characteristics, including ultra-wide fields of view, high-resolution imaging, and a significantly reduced form factor compared to traditional optical systems.

This invention relates to the field of spacecraft attitude control technology, and more particularly to an active phase stabilization control method and system for flexible vibration during agile maneuvers of satellites. Based on a two-level collaborative architecture of primary control on the satellite platform and secondary control on the three-dimensional super-platform, this method addresses the problem of sustained oscillations easily triggered by large flexible appendages after agile maneuvers by designing an active phase stabilization controller. This controller is configured to specifically design the key flexible mode frequencies affecting maneuver stability. Through phase lead compensation, the damping ratio of the system is effectively increased, thereby rapidly suppressing flexible vibrations after maneuver cessation. By distributing the load control torque, after phase stabilization compensation, to each actuator on the three-dimensional super-platform, rapid stabilization of the load direction within seconds is achieved, overcoming the contradiction between rapid maneuvering and ultra-high stability that is difficult to achieve in existing technologies, and meeting the stability requirements of ultra-high resolution imaging.

A system includes an apparatus for building a component by additive manufacturing using an energy beam, at least one first camera having a first field of view of the build plane, at least one second camera having a second field of view of the build plane, and a computing device. When the computing device receives a first image and a second image of the build plane captured by the at least one first camera and second camera, the images include a fiducial marker positioned on the build plane within an overlap region. Coordinates of the fiducial marker in the first image within the overlap region and within the second image are then identified. The first image and the second image are combined to form a merged image based on the identified coordinates of the fiducial markers in the first and second images.

The application discloses a tetrazine cyanine compound and a preparation method and application thereof. The skeleton of the tetrazine cyanine compound is directly connected with a BFI part of cyanine, can better affect the overall fluorescence opening multiple of the tetrazine cyanine compound by adjusting an R1 group, can also realize high-resolution imaging of a lysosome, an endoplasmic reticulum and a mitochondrial membrane by selecting a suitable R1 group and cooperating with a predetermined site molecule, can realize high fluorescence opening multiple in a near-infrared region, can significantly enhance a fluorescence emission signal from an extremely low background level after reacting with BCN, and can also have excellent light stability, wherein the fluorescence intensity of a TBCy3P addition product generated in situ is basically maintained unchanged in the whole irradiation period under continuous 100-frame laser scanning excitation, and the cell morphology is normal.

This invention provides a high-resolution computational imaging system and method for multi-structure electron irradiation and data fusion. The system includes: an electron beam source module that generates an electron beam of at least one wavefront shape and irradiates the sample under test; a sample platform module that carries the sample under test and, in conjunction with the electron beam of each wavefront shape, controls the relative displacement between the sample and the electron beam for zoned illumination; an electron detection module that, during zoned illumination, acquires diffraction patterns formed by the electron beam of the corresponding wavefront shape passing through the corresponding zone of the sample under test at each zone location; and a data processing module that stitches together the diffraction patterns of the wavefront-shaped electron beams corresponding to each zone location and uses an image reconstruction algorithm to perform phase recovery and complex amplitude reconstruction on the diffraction information of the stitched patterns to determine the sample transmission information and obtain a sample transmittance image. This invention achieves high-resolution imaging, has a simple overall structure, and low equipment cost.

A system includes an apparatus for building a component by additive manufacturing, a camera, an adjustable optical attenuator, and a computing device. When the computing device receives a signal indicating that a layer of particulate has been deposited onto a build plane, the attenuator adjusts the attenuation level of the camera to a low attenuation level, and the camera captures a pre-weld image. When the computing device receives a signal indicating a start of exposure of a layer of the component to an energy beam, the attenuator adjusts the attenuation level of the camera to a high attenuation level, and the camera captures an in-weld image. When the computing device receives a signal indicating an end of exposure of the layer of the component to the energy beam, the attenuator adjusts the attenuation level of the camera to the low attenuation level, and the camera captures a post-weld image.

The application discloses a strip mode spaceborne SAR multi-dimensional parameter joint self-focusing imaging method. First, spaceborne SAR original echo complex data and related parameters are acquired and preprocessed, and then baseband Doppler center frequency is estimated through azimuth direction delay conjugate multiplication and two-dimensional integration. Subsequently, Doppler ambiguity is solved based on an image sharpness maximization criterion, and the absolute Doppler center frequency is obtained in combination with the baseband frequency. Finally, initial Doppler frequency modulation is acquired through contrast maximization coarse search and sub-aperture cross-correlation fine search, a multi-dimensional parameter joint self-focusing optimization model based on a minimum entropy criterion is further constructed, three variables of Doppler center frequency, Doppler frequency modulation and center slant range are cooperatively optimized by using a simplex method, and full-automatic high-precision high-resolution imaging is realized. The method can complete parameter inversion and self-focusing imaging under the condition of extreme blind processing without ephemeris, and has excellent robustness and engineering practical value while reducing the calculation cost.

The present application relates to the technical field of tumor fluorescence contrast agent, and specifically provides a kind of indocyanine green and multi-arm polyethylene glycol conjugate or its pharmaceutically acceptable salt and preparation method and purposes thereof, the conjugate has the structural formula shown in formula (I), the binding capacity of the conjugate with serum protein is significantly reduced, and the tumor targeting is significantly improved, accumulates and lingers in tumor tissue, to realize targeted treatment or high-resolution imaging, to realize more accurate tumor localization and diagnosis, with very high application value, and open up new method for tumor imaging and treatment development.

The invention provides a TSV through hole-based 3D lamination alignment detection method, device and equipment and a storage medium, and the method comprises the steps: carrying out the high-resolution imaging of the side wall of a TSV through hole through a section sample obtained by carrying out the layer-by-layer etching of each TSV through hole in a first lamination layer in a direction perpendicular to the surface of a wafer, and obtaining a side wall image; measuring the longitudinal continuous distribution of the conductive filling material in the TSV through hole based on the side wall image to obtain a current response map; determining an effective conductive axis based on position information of a depth interval in which the current intensity is higher than a preset intensity threshold value in the current response map, and constructing a reference axis based on the effective conductive axis in combination with geometric center coordinates of a top opening of the TSV; and calculating a space offset vector of the reference axis of the corresponding TSV between the two laminations based on the reference axis of the TSV at the corresponding position on the second lamination to obtain an alignment deviation value. According to the invention, the robustness of alignment detection of the 3D lamination under a complex process condition is improved.

The application discloses a kind of robust frequency-modulated stepped frequency ISAR imaging radar velocity estimation methods, belong to radar technical field, first construct multiple frames frequency-modulated stepped frequency data model;Again, the velocity estimation and compensation of rough accuracy are realized using the same frequency point offset estimation of multi-frequency point synthesis;Then, the high-resolution imaging of the coarse resolution distance unit where the special point is located is obtained by the IFFT of intra-frame sub-pulse dimension, and the high-precision velocity estimation and compensation are realized using the high-resolution image of multiple special point synthesis;Finally, ISAR imaging is realized through the FFT between frames.The application realizes the estimation and compensation of velocity gradually using two-step method, first realizes the estimation and compensation of large motion amount by rough estimation, then realizes the residual motion estimation and compensation of high precision by synthesis high resolution;Offset estimation is realized using envelope cross correlation, motion parameter estimation is realized using offset fitting, and the amount of calculation is small;The robustness of algorithm is improved using the characteristics that multiple frequency points are not easily disturbed simultaneously, and the robustness of high-resolution velocity estimation is improved using the motion identity of multiple special points.

According to at least one aspect of the present disclosure, there is provided an imaging agent comprising a dye compound conjugated to an antigen-specific targeting vehicle, which can be particularly advantageous as its behavior in vivo can contribute to superior optical imaging properties, for example by significantly increasing the solubility of the dye and / or the targeting vehicle, increasing the target-to-background ratio of the imaged tissue, yielding higher resolution imaging, and ultimately providing better identification of malignant tissue for resection and margin assessment, as well as improved visualization, for example during minimally invasive laparoscopic surgery. A method of imaging tumor cells in a subject can comprise: administering an imaging effective amount of an imaging agent according to at least one embodiment of the present application; irradiating a region in the subject where tumor cells are expected to be found with a wavelength absorbed by the imaging agent; and detecting a signal from the imaging agent.

A kind of fold-diffraction hybrid middle wave infrared refrigeration optical lens, including being arranged in order from left to right along the direction of optical axis successively: first single lens L1, second single lens L2, third single lens L3, fourth single lens L4, fifth single lens L5, sixth single lens L6, seventh single lens L7 and eighth single lens L8, the first single lens L1 is meniscus positive lens, the present application aims at solving the problems existing in prior art middle wave infrared imaging system, through the innovative fold-diffraction hybrid optical system design, high transmittance, large field of view, high resolution imaging performance is realized, while ensuring the stability in wide temperature range. Through careful design and reasonable selection of material to optical element, the lens of the application not only improves the imaging quality, but also reduces the processing cost, simplifies the difficulty of installation and adjustment, provides a new direction for the development of middle wave infrared imaging technology.