98results about How to "Improving Imaging Accuracy" patented technology

The invention discloses a novel noise HV spectrum ratio imaging method based on polarization. The method comprises the following steps: collecting background noise data in a predetermined monitoring area; preprocessing the acquired background noise data, wherein the preprocessing comprises data format conversion, data splicing, mean value removal, trend removal, waveform pinching and band-pass filtering processing; preprocessed data are processed by adopting a polarization analysis technology, a wave field is separated by setting a threshold value and analyzing a power spectrum, and a background noise area is divided into a linear body wave component and a nonlinear surface wave component. According to the polarization-based noise HV spectrum ratio imaging method, the precision and efficiency of underground structure analysis are remarkably improved through the precise separation of the wave field and the automatic processing flow of the HV spectrum ratio, and by means of polarization analysis optimized data processing, the automatically generated frequency and depth profile and the automatically picked excellent frequency and peak value, the imaging precision and efficiency of the underground structure are greatly improved. And the analysis of the underground velocity structure and the wave impedance interface is more accurate.

The invention provides a seismic data imaging method and system based on anisotropy, and belongs to the technical field of oil and gas field development. According to the method, on the basis of the research of anisotropy, a high-order difference operator equation is improved, and a vertical transverse medium anisotropy model and a transverse medium isotropy model are established on the basis of improved difference approximation expressions of different orders; the established vertical transverse medium anisotropy and transverse medium isotropy model is adopted to carry out seismic data imaging. According to the method, the physical property characteristics of the earth medium with dramatic changes in the longitudinal and transverse directions can be effectively processed; the method has the advantages of improving the signal-to-noise ratio of seismic data, improving the seismic imaging effect, improving the imaging precision of a fracture system and highlighting the seismic reflection characteristics of a target layer.

The invention discloses a handheld security check imaging method based on MEMS assistance, and aims to combine an MEMS sensor with an MIMO radar plate to form a handheld convenient security check imaging method with high precision and low cost according to the rapid and fine security check requirement of people in a security check place with dense people. Firstly, the radar board transmits a linear frequency modulation signal and receives an echo signal reflected by a target, and during the period, the MEMS sensor feeds back the motion track and position information of the handheld security check system in real time, and provides accurate attitude and position information. And secondly, position calibration is carried out on the track information of the MIMO radar antenna through the data of the MEMS sensor, and the zero drift of the accelerometer is compensated based on the wavelet packet change, so that the error caused by the system motion and the position change is reduced. And finally, residual phase errors are estimated and eliminated based on a particle swarm algorithm, non-contact three-dimensional imaging of the target is realized in combination with a wavenumber domain imaging algorithm on this basis, and hazardous article inspection is realized in combination with technologies such as deep learning and image recognition.

The invention discloses an electrical source transient electromagnetic data imaging method, device and system, and a storage medium. The method comprises the following steps: S1, observing a horizontal electric field Ex and a vertical induced voltage Vz at the same measuring point; s2, respectively solving first-order derivatives of the horizontal electric field Ex and the vertical induced voltage Vz to the time t; s3, calculating the whole-period apparent resistivity according to the first-order derivative; and S4, time-depth transformation is carried out according to the whole-period apparent resistivity, and apparent resistivity depth imaging is realized. By adopting the technical scheme of the invention, the influence of the emission source is eliminated, and the imaging precision and convenience of the electrical source transient electromagnetic method can be obviously improved.

The invention relates to the technical field of radar digital signal processing, in particular to a radar echo frequency domain simulation and imaging system and method, a medium and equipment. The radar echo frequency domain simulation and imaging system comprises: a backscattering coefficient matrix generation module for calculating a backscattering coefficient matrix in combination with an earth surface digital map; the satellite orbit simulation module is used for calculating and obtaining satellite orbit azimuth sampling point coordinates by combining the satellite orbit and the coordinates of the point, closest to the scene center, of the satellite orbit; the spaceborne synthetic aperture radar echo rapid generation module obtains a spaceborne synthetic aperture radar baseband echo signal by using an inverse omega K echo generation method; and the spaceborne synthetic aperture radar imaging processing module is used for processing by adopting an omega K imaging algorithm to obtain a spaceborne synthetic aperture radar image. According to the method, the calculation complexity of generating the synthetic aperture radar echo signal in the extended scene can be reduced, and the efficiency and precision of synthetic aperture radar echo generation and imaging are improved.

The invention discloses an automatic focusing and distortion optimization method based on a large-target-surface industrial lens, relates to the technical field of lens distortion optimization, and aims to accurately identify different distortion types and provide accurate data for subsequent optimization and adjustment by comprehensively analyzing the distortion of the lens from multiple dimensions (radial, tangential and comet distortion). Through calculation of a comet distortion coefficient HJ obtained by calculating a detailed radial distortion coefficient # imgabs0 #, a first tangential distortion coefficient # imgabs1 # on an x axis and a second tangential distortion coefficient # imgabs2 # on a y axis in combination with S44, various distortion conditions (radial, tangential and comet distortion) of the lens can be quantified, and the total distortion rate D is calculated; the distance between the front focusing group A and the rear fixed lens group B of the lens is evaluated and corrected, and the imaging quality of the lens is improved through step-by-step correction (including focal length, distortion, brightness attenuation and the like) in each step from S2-S5.

The invention provides a short-wave infrared detection device in the field of semiconductor chip detection, which is characterized in that the side edge of a mirror tube is connected with a laser sensor, the mirror tube is connected with a microscope through a liquid lens, and the microscope is arranged corresponding to backlight; the laser sensor detects the linear distance between the laser sensor and the surface layer of the chip, the liquid lens performs focusing according to the detected linear distance, backlight lights from the bottom of the chip, and the short-wave infrared camera detects the surface of the chip. According to the invention, the liquid lens performs autonomous focusing according to the distance to the surface layer of the chip measured by the laser sensor, the image capturing precision is improved, the combination of the special short-wave infrared camera, the special lens tube and the special short-focus SWIR microscope is adopted, the FOV: 3.53 mm * 2.83 mm is realized, the depth of field of field is 6 [mu] m, the precision is 1.38 / pixel, the liquid lens can penetrate through the surface layer of the chip to perform high-definition detection, and the problem of out-of-focus is effectively solved.

The invention relates to the technical field of medical information management, and particularly discloses a stomach cancer postoperative MRD dynamic monitoring system based on multi-biomarker fusion, which is used for solving the problem that in the prior art, CT and MRI equipment cannot dynamically adjust parameters according to real-time recurrence risk of a stomach cancer postoperative patient, so that the stomach cancer postoperative MRD dynamic monitoring system is poor in reliability. The system comprises a biomarker data acquisition module and a recurrence risk analysis module, and further comprises a CT equipment parameter adjustment module, an MR I equipment parameter adjustment module, a feedback control module and an examination means optimization module. Through fusion of multiple biomarkers, dynamic monitoring of gastric cancer postoperative MRD is realized, CT and MRI parameters are adaptively adjusted based on the recurrence risk of a patient, imaging precision is improved, equipment operation is optimized, radiation and imaging time are reduced, and precise CT and MRI imaging equipment parameter management is realized.

The invention provides an appearance detection device. The appearance detection device comprises a visible light inspection station and two short-wave infrared light inspection stations which are sequentially arranged on the side edge of a tape transmission runner; the winding tape transmission flow channel transmits a winding tape, the winding tape comprises a covering film, a bearing tape and a chip, the chip is arranged in a pocket in the bearing tape, and the covering film covers the upper surface of the bearing tape; the visible light inspection station performs appearance inspection on the tape, and the short-wave infrared light inspection station performs appearance inspection on the surface layer of the chip. Only 100 ms is needed for moving 8 mm through a stepping motor, the overall inspection speed reaches 45 k / h, the precision of 1.38 microns and the visual range of 3.53 * 2.83 are achieved by adopting a short-wave infrared light inspection station, the image taking time is only 1 ms, and the image taking effect is not blurred during high-speed movement; the boss and the pressing wheel are additionally arranged, the winding tape is pulled upwards and pressed downwards, the winding tape is kept in a stable state on the boss, and the imaging effect of the camera is better ensured.

The invention discloses an unmanned aerial vehicle-mounted MIMO-SAR intelligent information processing device, and the device comprises an MIMO antenna array which is used for transmitting and receiving radar signals at different angles; the signal processing unit is used for performing amplification, filtering and analog-to-digital conversion on the received radar signal; the SAR imaging module is used for generating a high-resolution ground image according to the processed signal; the intelligent information processing module is used for automatically identifying and analyzing a target in the SAR image; the aircraft control module is used for adjusting a flight path and radar parameters so as to optimize the imaging quality; and the data transmission module is used for transmitting the processed data to a ground control center in real time. The device can be suitable for various application scenes including military reconnaissance, topographic mapping, disaster assessment, environment monitoring and the like, has wide adaptability and flexibility, and has high market competitiveness in unmanned aerial vehicle application.

The invention relates to the technical field of optical microscopic imaging, in particular to a three-dimensional active feedback tracing imaging device and method. According to the scheme, after the light source emits the laser, the laser is modulated through the laser focus modulation assembly to generate the illumination area, the laser focus scans at each scanning position of the illumination area, the fluorescence signal is generated after the laser irradiates the to-be-tracked object, and the fluorescence signal is collected through the fluorescence signal collection assembly; the signal is transmitted to the control and processing assembly, the control and processing assembly calculates the position deviation between the position of the object to be tracked and the reference position in the illumination area according to the position of the laser focus and the electric signal, and the spatial position of the illumination area is adjusted according to the position deviation, so that the object to be tracked is always located at the reference position in the illumination area. According to the invention, active feedback tracing of the to-be-tracked object is realized by controlling the movement of the illumination area, the imaging precision and the imaging speed are obviously improved, and the three-dimensional active feedback tracing function of the high-speed moving target is realized.

The invention relates to the technical field of biological imaging, in particular to a three-dimensional living body imaging system and method, and the system comprises an excitation device which is used for emitting a first parallel Gaussian light spot; the near-infrared structured light generation device is used for modulating the first parallel Gaussian light spot into first dynamic structured light; the first deformable mirror is used for reflecting a structural fluorescence signal in a living body to be imaged to the first dichroscope; the first dichroscope is used for dividing the structure fluorescence signal, reflected by the first deformable mirror, in the to-be-imaged living body into a first path of light and a second path of light; the near-infrared adaptive optical device is used for obtaining aberration according to the first path of light and a specified light structure; the imaging device is used for acquiring a two-dimensional image corresponding to the living body to be imaged based on the second path of light; and the three-dimensional reconstruction device is used for reconstructing the two-dimensional image into a three-dimensional model and controlling the first deformable mirror according to the aberration, so that the aberration between the first path of light and the specified light structure is reduced within a preset range.

The invention relates to the technical field of neutron imaging and detection, in particular to a data processing method for a neutron imaging detector based on a micro channel plate (MCP), and more particularly relates to a waveform analysis and example reconstruction algorithm for white light neutron resonance imaging. Comprising a waveform analysis step and a case reconstruction step, in the waveform analysis step, an advanced waveform recognition technology is adopted, off-line analysis is carried out on signal waveforms on an anode plate of the neutron imaging detector, and the signal waveform of each electron group is accurately recognized; in the case reconstruction step, the signals are grouped and paired based on a waveform analysis result, and an accurate position reconstruction model is constructed to obtain an accurate coordinate of an electron group hit position; the method not only improves the imaging precision and the counting rate, but also optimizes the data processing flow, adapts to the condition of high counting rate, improves the overall performance of the system, expands the application field, and provides powerful support for the development and application of the neutron imaging technology.

The invention relates to the technical field of oil and gas exploration and development, and discloses a velocity field model construction method and system, and the method comprises the steps: obtaining a higher-precision anisotropic depth migration layer velocity model through step-by-step iteration of an initial depth domain low-frequency velocity model on the basis of adding geological information, and obtaining a final depth migration result data body. The problems that in the prior art, modeling precision is low, pre-stack depth migration imaging is difficult, and complex structure exploration and development scenes are difficult to adapt are solved.

The application discloses a kind of acoustic-electric tomography image imaging algorithm based on two-point gradient iterative method, and the innovation is to improve the calculation efficiency by two-point gradient iterative method, and the accuracy of image reconstruction is improved by the selection of regularization term.The core of the application is to use the characteristics of acoustic-electric hybrid imaging, that is, when the boundary detection current is applied, the power density data is obtained by using ultrasonic disturbance, so as to obtain the internal data of biological tissue.At the same time, according to the different characteristics of different biological tissue conductivity, different regularization terms are introduced, two-point gradient iterative method is established, and high-resolution reconstruction of biological tissue conductivity is realized.Compared with the traditional acoustic-electric imaging method, the application reduces the calculation and storage cost of multiple observation currents, improves the imaging efficiency.And the iteration process is modified by using a special regularization term, so that the boundaries or geometric characteristics of different tissues can be accurately determined, and the imaging accuracy is improved.

The application relates to a fan-beam CT scanning plane coplanar calibration method based on a double-column model, belonging to the CT imaging technical field. Two equal-height cylinders are fixed at the edges of a rotating platform at intervals, a space three-dimensional coordinate system is established with the rotating platform and an X-ray source as reference objects, the initial position of the rotating platform is set so that the two cylinders are both separated from a scanning plane, the X-ray source is turned on to perform line scanning, the rotating platform is uniformly lifted and lowered, and a line array detector collects line scanning projection data; the relative height of the X-ray source and the line array detector and the relative height of two end portions of the line array detector are respectively adjusted until the two cylinders appear simultaneously in the line scanning projection data, which is regarded as the fan-beam CT scanning plane coplanar. The application can solve the technical problem that the scanning plane deviates from a theoretical model to affect the fan-beam CT imaging precision in the prior art.

This invention belongs to the field of geophysical exploration technology, and specifically relates to a magnetotelluric two-dimensional imaging method based on a visual self-attention mechanism. The method of this invention is an end-to-end deep learning imaging approach, which has a significant advantage in computational time compared to traditional inversion methods. By constructing a geophysical theoretical model generation program, diverse geoelectric theoretical models are generated in batches, ensuring the scale and diversity of training samples. By introducing a pre-training process, the self-attention mechanism, with its stronger modeling ability and better ability to capture relative relationships in the data compared to convolutional structures, improves the model's generalization ability. Addressing the problem of missing information about deep anomalies when using only a single mode response data, a magnetotelluric two-dimensional imaging network suitable for TE / TM joint modes is proposed. By optimizing and improving the relative position encoding in the network, the model can correctly acquire and fuse input information from both TE and TM modes.

The present invention belongs to the field of advanced geological prediction, and discloses a multi-pulse spark source directional acoustic wave advanced detection system and an advanced geological prediction method. The system includes a directional spark excitation source, an acoustic wave receiving sensor, a host computer, and a multi-level energy storage capacitor; there are multiple directional spark excitation sources, and each of them can independently excite a directional high-frequency acoustic wave signal; each directional spark excitation source is equipped with a rotation azimuth controller; there are multiple acoustic wave receiving sensors; the multi-level energy storage capacitor is connected to each directional spark excitation source, and is used to apply multi-pulse spark signal excitation to each directional spark excitation source. The present invention utilizes a directional spark excitation source and multiple pulse excitations to enhance the propagation distance of the acoustic wave signal, and through the directional spark source acoustic wave excitation and multi-band signal superposition, all-round directional focusing is performed in front of the excavation face to enhance the resolution of poor geological bodies, thereby obtaining an accurate description of the location and occurrence state of abnormal geological bodies.

The invention discloses a working method and system of a projection camera integrated with a temperature control function, and relates to the field of cameras. The method comprises the following steps: synchronously acquiring an infrared thermal field, dark current of an image sensor and a duty state of a micro-mirror array, and calculating a multi-source thermal disturbance characteristic value through an entropy algorithm and photo-thermal phase difference analysis; driving a thermal diffusion diagram neural network by the characteristic values, inverting a thermal strain field, and projecting the thermal strain field to a Zernike basis function space to generate a thermally induced aberration risk index and a thermodynamic diagram; calculating an active temperature control intervention level and a strategy parameter through an adaptive threshold value and fuzzy reasoning based on the risk index and the convection intensity estimation value; constructing a multi-objective non-convex optimization problem according to the intervention level, and solving to obtain a collaborative scheduling weight and an optimization instruction; and extracting the maximum Lyapunov index and generating a thermal stability look-ahead confidence coefficient with the risk index to predict future thermal evolution and perform adaptive regulation and control. According to the invention, the imaging precision of the projection camera under thermal disturbance is improved through multi-level cooperative temperature control.

The invention discloses an image generation method and device based on an ultrasonic patch, equipment and a medium, and relates to the technical field of medical imaging. The method comprises the following steps: acquiring a dynamic ultrasonic image in a radiation process in real time by using an ultrasonic patch probe; fusing the dynamic ultrasonic image with a tumor CT / MRI image in a tumor radiotherapy planning device to obtain a fused image; the fused image is used for assisting related workers in determining an optimal radiotherapy point. According to the method, the imaging precision of image fusion can be improved, the tumor radiotherapy precision can be improved, besides better real-time dynamic imaging can be achieved, workers do not need to enter a treatment room on site for operation in batches, and the risk that the workers are irradiated can be better avoided.

A phase measurement deflectometry wavefront measurement device and method based on a vortex focusing lens comprises a display screen, a vortex focusing lens, a rotating mirror frame, a filter pinhole, a focusing lens, an object to be measured, a first three-dimensional translation stage, an image acquisition module, a second three-dimensional translation stage and a computer. The present invention obtains incident vortex stripe light beams with different phase shifts by rotating the vortex focusing lens, utilizes the object-image relationship between the object to be measured and the target surface of a detection system, and then utilizes the image acquisition module to record the intensity information of the incident vortex stripe light beam before and after passing through the wave to be measured, thereby combining a multi-step phase shift algorithm, a regional wavefront reconstruction algorithm, etc. to realize accurate reconstruction of the wavefront to be measured; the present invention has a compact structure, low cost, simple operation, and high detection accuracy, can avoid the use of expensive laser light sources, can expand the application scope of wavefront measurement devices, and can provide a new technical solution for the civilian and commercialization of phase measurement deflectometry.

This invention belongs to the field of motor technology and discloses a high-linearity finite-angle torque motor, comprising a cylindrical rotor and a cylindrical stator, with the rotor housed within the stator. The stator includes N coils and N constant magnetic circuit channels, where N is an even number of at least 2. The rotor's magnet portion has N polarities. The N coils of the stator are evenly arranged circumferentially on the inner side of the stator, with adjacent coils separated by constant magnetic circuit channels. The ends of all coil frames and the ends of the constant magnetic circuit channels together form the rotor's rotational track. Adjacent stator coils have opposite polarities after being energized, and adjacent rotor magnets also have opposite polarities. This invention employs a special stator lamination structure, theoretically eliminating stator cogging torque within the motor's operating angle range, thus improving the linearity of the motor's output torque. Compared to traditional slotted finite-angle torque motors, the output torque fluctuation is reduced by more than 70%.

The invention discloses a synthetic aperture imaging method of an orthogonal frequency division multiplexing signal based on backward projection, and belongs to the technical field of radar imaging. According to the method, in the process of carrying out synthetic aperture imaging by utilizing OFDM signals, firstly, range compression is carried out, range direction compression is carried out by adopting a matched filtering thought, then range direction interpolation is carried out, range direction interpolation is carried out by adopting a frequency domain zero filling thought, then an imaging area is divided, the distance from each azimuth moment to a radar grid point is calculated, and the distance between each azimuth moment and the radar grid point is calculated. And finally, phase compensation and coherent superposition are carried out on the data at each azimuth moment, and the spatial position of the target in the imaging area is reconstructed point by point. According to the method, each pixel point in the imaging area can be accurately calculated, the spatial positions of all targets in the imaging area are reconstructed, the imaging precision is improved, the image quality is improved, and the good imaging effect is achieved under the near-field condition.

This invention discloses a tomographic SAR three-dimensional imaging method for low-altitude platforms, comprising the following steps: acquiring SAR images; performing sparse inversion on the SAR images within a lower viewpoint constraint range based on a cylindrical wave TomoSAR imaging model to determine the scattering coefficients of the scatterer signal along the elevation direction in the pixels; calculating the lower viewpoint parameters based on the scattering coefficients; and generating the position coordinates of the scatterer in the ground coordinate system based on the lower viewpoint parameters. This invention, by constructing a cylindrical wave TomoSAR imaging model for sparse inversion, can correct the geometric deformation of the scatterer, significantly improving the three-dimensional imaging accuracy of the scatterer. Simultaneously, by adaptively determining the elevation search range based on the elevation constraint, elevation deblurring is achieved, further enhancing imaging accuracy.

The three-dimensional imaging method based on the squint mode SAR tomography data of the present invention obtains the precise ephemeris of N re-orbit satellites, obtains the scene center position and the re-orbit satellite position at the re-orbit aperture center moment of each re-orbit satellite trajectory according to the precise ephemeris of the re-orbit satellite; calculates the re-orbit satellite trajectory k according to the scene center position and the re-orbit satellite position of the reference trajectory k0 i The geometric correlation coefficient of the image pair with the reference trajectory k0; according to the heavy orbit satellite trajectory k i The accurate ephemeris of the image is used to calculate the effective vertical baseline of the re-orbit aperture center to the reference trajectory k0; the re-orbit satellite trajectory k is calculated based on the geometric correlation coefficient of the image pair and the effective vertical baseline. i The height inversion accuracy CRLB of the selected heavy orbit satellite trajectory k i The optimal position of the elevation inversion accuracy CRLB is used as the trajectory of the re-orbit satellite k i The center of the heavy orbit aperture is used to collect the heavy orbit satellite trajectory k i SAR image; repeat the above steps until all heavy track aperture centers are optimized; use compressed sensing method to estimate target elevation, and obtain the three-dimensional position of the target in the geodetic coordinate system according to the elevation direction of the squint mode to improve the accuracy of SAR tomographic three-dimensional imaging.

The aerospace-level near-field rendezvous and docking TOF optical system comprises an object side surface lens group, a diaphragm, an image side surface lens group and a photosensitive imaging surface which are sequentially arranged from an object side surface to an image side surface, the object side surface lens group contracts the aperture of the incident light; the diaphragm is used for adjusting the luminous flux by adjusting the size of an aperture formed in the diaphragm; the image side surface lens group further focuses the light, corrects aberration, and then projects the light onto a photosensitive imaging surface to form a final image; the object side surface lens group comprises a first negative meniscus lens, a second negative meniscus lens, a first biconvex lens and a first positive meniscus lens which are sequentially arranged from the object side surface to the image side surface; and the image side surface lens group comprises a first optical filter, a third negative meniscus lens, a second positive meniscus lens, a second biconvex lens, a first plano-convex lens and a first plano-concave lens which are sequentially arranged from the object side surface to the image side surface. The optical system provided by the invention can realize high-precision imaging of a near-field target, and has a guiding effect on improvement of imaging precision in rendezvous and docking.

The invention provides a vehicle-mounted microwave imaging method and application thereof, and the method comprises the steps: obtaining a first image through collecting the data of different vehicle-mounted antenna channels; performing hierarchical Doppler transform based on the first image to obtain a second image; performing spatial registration on the second image to obtain an aligned image; performing interpolation processing on the aligned image to obtain an interpolated image; and performing multi-stage Doppler comprehensive processing on the interpolated image to obtain a final microwave imaging result. The method comprises the following steps: acquiring a first image with low resolution, extracting a second image containing richer speed information through hierarchical Doppler transform, ensuring that a result of each level of transform corresponds to a consistent spatial position through spatial registration, and further performing single-machine Doppler interpolation to obtain a final image. According to the method, a high-definition microwave imaging result is obtained through multi-stage Doppler comprehensive processing, so that accurate speed and position analysis is realized.

The invention discloses an ERT sensor electrode and a preparation method and application thereof.The ERT sensor electrode comprises a stainless steel substrate and a copper reinforcement body, blind holes covering the side surface of the stainless steel substrate are evenly distributed in one side of the stainless steel substrate, and blind hole reinforcement parts matched with the blind holes in the surface of the stainless steel substrate are evenly distributed on the copper reinforcement body; the blind hole and the blind hole reinforcing piece are tightly embedded to form a stainless steel-copper composite layer; according to the ERT sensor electrode, the stainless steel serves as the substrate, the copper reinforcement is introduced, the conductivity of the ERT sensor electrode is remarkably improved while the abrasion resistance and corrosion resistance of the electrode are guaranteed, the blind holes in the stainless steel substrate and the blind hole reinforcement pieces matched with the blind holes in the copper reinforcement are tightly embedded, and the corrosion resistance of the electrode is greatly improved. The firm combination of the stainless steel substrate and the copper reinforcement is ensured, and the conductivity of the electrode is further enhanced.

The invention discloses an OBN shear wave leakage noise attenuation method based on curvelet domain extended filtering, and the method comprises the following steps: creating a Hilbert transform record and a time derivative record of a Z component and a time derivative record of Hilbert transform based on the shear wave data of X and Y components in OBN data, and on the basis, a transverse wave leakage matching subtraction method of curvelet domain least square extended filtering is applied, so that high-precision separation of effective information and transverse wave leakage noise is realized. Theoretical model experiment and field data processing experiment results show that the method gives consideration to the separation advantage of curvelet transformation to effective signals and shear wave leakage noise and the adaptability of extended filtering to shear wave leakage prediction errors, can significantly improve the elimination precision of shear wave leakage interference on the premise of avoiding effective signal damage, and has good application prospects. And the imaging precision of the OBN data is improved.

The invention provides a radioactive material activity obtaining method and product, and the method comprises the steps: carrying out the scattering imaging scanning of a radioactive material container through a plurality of muons, and obtaining the muon scanning information of the radioactive material container; determining density distribution data of the radioactive material in the radioactive material container according to the muon scanning information; based on the density distribution data of the radioactive materials in the radioactive material container, efficiency calibration is conducted on the radioactive material container through passive efficiency calibration software, and efficiency calibration data of the radioactive material container are obtained; and determining the activity of the radioactive material in the radioactive material container according to the efficiency scale data of the radioactive material container. According to the radioactive material density distribution data determined based on the muon scattering imaging scanning information of the radioactive material container, efficiency calibration is carried out on the radioactive material container, the efficiency calibration accuracy of the radioactive material container can be improved, and the accuracy of determining the activity of the radioactive material is improved.