75results about How to "Improving Imaging Efficiency" patented technology

The invention provides a multi-angle photographing and three-dimensional reconstruction method and system for soft tissue, and relates to the technical field of soft tissue three-dimensional reconstruction, and the method comprises the steps: analyzing soft tissue features based on deep learning, generating a bulb tube motion track and sampling interval data, and controlling a mechanical arm to drive a bulb tube to collect projection images at multiple angles; screening an optimal image sequence by using an image quality evaluation network, and performing preprocessing such as material decomposition, feature extraction, space registration and image optimization; and inputting the optimized image and the material features into a reconstruction model, performing iterative calculation in combination with an anatomical structure template to generate density distribution data, performing curved surface reconstruction and intelligent tissue segmentation based on graph convolution based on the density distribution data, and finally generating a three-dimensional model containing tissue layering information.

The invention discloses a dam termite nest three-dimensional imaging method and system based on a ground penetrating radar, and the method comprises the steps: obtaining the three-dimensional ground penetrating radar data of a target region, and carrying out the data preprocessing, and obtaining the preprocessed three-dimensional ground penetrating radar data; performing feature extraction processing and encryption processing on the preprocessed three-dimensional ground penetrating radar data to obtain a multi-channel radar data body; based on the U-shaped network structure, constructing an ant nest imaging three-dimensional deep learning network model; and performing data imaging processing on the multi-channel radar data volume based on the ant nest imaging three-dimensional deep learning network model to obtain an ant nest imaging result based on the three-dimensional ground penetrating radar. According to the embodiment of the invention, the complex features of the ant nest and the dam structure on the three-dimensional ground penetrating radar image can be more accurately captured, and then the accuracy of ant nest imaging is improved. The method can be widely applied to the technical field of termite nest detection.

The invention provides a multi-focus and multi-band channel auto-focusing confocal microscopic imaging system, and relates to the technical field of microscopic imaging, the system comprises an excitation end, a detection end and a control module, the control module is connected with the excitation end and the detection end; according to the invention, through integration of advanced optical design and an automatic control algorithm, rapid and accurate focusing is realized, and imaging under multiple wavebands is supported at the same time.

The invention provides a synthetic aperture radar spectrum error estimation compensation method, and particularly relates to the technical field of synthetic aperture radar signal processing, and the method comprises the steps: optimizing the image quality through multi-step processing, obtaining a coarse compensation signal through conjugate multiplication and inertial navigation coarse compensation, and generating a coarse focusing sub-image through sub-aperture division and BP imaging technologies. Image details are improved through up-sampling, spectrum decompressing and coherent fusion, high-order and linear phase errors are accurately estimated, a phase gradient is calculated based on a PGA algorithm and a least square method so as to correct full-aperture image spectrum errors, coherent fusion is carried out on compensated sub-images again, and the phase error estimation and compensation process is repeated until the optimal phase error is achieved. And finally performing fusion processing to generate a high-precision radar image. The technical problems of low accuracy of spectrum error estimation and low imaging efficiency of a high-precision image in the existing motion compensation technology are solved, so that the accuracy of spectrum error estimation and the imaging efficiency of the high-precision image are effectively improved.

The invention relates to the technical field of magnetic resonance imaging, and discloses a motion estimation guided magnetic resonance four-dimensional dynamic imaging method and device, and the method comprises the steps: obtaining a three-dimensional single-frame static image of magnetic resonance and an under-acquired low-resolution four-dimensional dynamic image sequence, the low-resolution four-dimensional dynamic image sequence is a multi-frame low-resolution four-dimensional dynamic image obtained by carrying out undersampling on K space acquisition data; utilizing a motion encoder in the image sequence prediction model to extract motion estimation information in the low-resolution four-dimensional dynamic image sequence; inputting the three-dimensional single-frame static image into a structure encoder in the image sequence prediction model to obtain static anatomical structure information; and fusing and decoding the motion estimation information and the anatomical structure information through a decoder to obtain a high-resolution four-dimensional dynamic image sequence. The problems that an existing magnetic resonance four-dimensional imaging technology is long in scanning time, complex organ movement is difficult to capture, and time-space consistency is poor are solved.

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 relates to the technical field of optical microscopic imaging, and discloses a scanning structured light microscopic imaging system and method based on a multi-focus diffraction-free light beam. Exciting light emitted by a laser light source sequentially passes through an electro-optical modulator and a lens group I and then enters a spatial light modulator; the spatial light modulator is used for synchronously regulating and controlling the multi-focus array and the non-diffraction light beam to generate the multi-focus array with the non-diffraction light beam characteristic; afterwards, the light sequentially passes through a lens group II, a two-dimensional scanning galvanometer, a scanning lens, a tube lens, an emission optical filter, a double-color piece and an objective lens and then irradiates a sample to be imaged; fluorescent light generated by a to-be-imaged sample passes through the objective lens and the double-color sheet and then is transmitted to the area-array camera, and fluorescent light signals at a plurality of focal points are collected to form a fluorescent light image. According to the invention, a diffraction-free optical phase modulation mechanism is introduced, simultaneous imaging of different depth layers is realized, the imaging speed is improved, sample information missed due to limited focusing depth is avoided, and the optical power utilization rate and the imaging quality are greatly improved.

The invention relates to a hyperspectral imaging method and device, electronic equipment and a storage medium. The hyperspectral imaging method comprises the steps of determining a rotary diffraction blurred image and an RGB image corresponding to a target object; determining an initial hyperspectral image corresponding to the target object according to the rotation diffraction blurred image; and a target hyperspectral image corresponding to the target object is determined according to the initial hyperspectral image and the RGB image by using a hyperspectral image reconstruction model, and the resolution corresponding to the target hyperspectral image is higher than the resolution corresponding to the initial hyperspectral image. According to the embodiment of the invention, the physical information of the rotation diffraction imaging process can be fully utilized, the rotation diffraction image is preliminarily reconstructed, the hyperspectral image reconstruction model and the RGB image are combined to carry out secondary reconstruction, the target hyperspectral image with high resolution is obtained, and the resolution of the target hyperspectral image is improved for different application scenes. The neural network model does not need to be retrained, and the application range and the mobility of the hyperspectral imaging method provided by the invention can be improved.

The invention discloses an ISAR (inverse synthetic aperture radar) robust imaging method based on a sparse Bayesian learning network, which mainly solves the problems of poor imaging performance under the condition of low signal-to-noise ratio and lack of robustness for echo imaging with different signal-to-noise ratios and defect rates in the prior art. According to the implementation scheme, the method comprises the following steps: firstly, establishing an ISAR sparse observation model under an echo defect condition, and constructing a training set and a test set according to the observation model; constructing a probability model according to the observation model, expanding a 2D-IFGaPL algorithm into a deep network according to the probability model, and embedding a CNN into the deep network to form a main network; constructing a super network to dynamically generate model parameters corresponding to echoes with different defect rates, and connecting the model parameters with the main network to form a sparse Bayesian learning network; and training the sparse Bayesian learning network by using the training set, and inputting the test set into the trained network to obtain a final ISAR high-resolution imaging result. The method improves the imaging precision and robustness under the condition of low signal-to-noise ratio, and can be used for ship-borne and airborne ISAR (Inverse Synthetic Aperture Radar) systems.

The invention belongs to the technical field of pulsed eddy current nondestructive testing, and particularly discloses a ferromagnetic component pulsed eddy current detection imaging method and system, and the detection imaging method comprises the following steps: collecting a pulsed eddy current signal of a ferromagnetic component, carrying out logarithmic processing on the pulsed eddy current signal, and then carrying out secondary filtering processing; carrying out dimension reduction processing on the signal after the secondary filtering processing; calculating an amplitude standard deviation of the signal after dimension reduction processing of each time dimension, and selecting an effective imaging interval based on the amplitude standard deviation; performing Min-Max standardization processing on the data in the effective imaging interval; and calculating a pixel value based on a processing result obtained by Min-Max standardization, and carrying out homogenization processing on the pixel value to obtain a pulsed eddy current image. According to the invention, rapid imaging can be realized aiming at the pulsed eddy current detection signal of the ferromagnetic component, so that defects can be identified and preliminarily positioned.

The utility model discloses an alignment detection device which comprises a first light source, a second light source, a light ray processing assembly and an image capturing assembly, the light ray processing assembly comprises a first light ray processing piece and a second light ray processing piece, the first light source emits first light rays, the first light rays irradiate a first workpiece of a first detection station, and the second light rays irradiate a second workpiece of a second detection station; the first light source emits first light, the reflected light of the first light reaches the image capturing assembly through the first light processing part, the second light source emits second light, the second light irradiates a second workpiece of the second detection station through the second light processing part, and the reflected light of the second light reaches the image capturing assembly through the light processing assembly; the image capturing assembly is used for capturing images of the first workpiece and the second workpiece. The first light source can irradiate the first workpiece, the second light source can irradiate the second workpiece, the reflected light of the first light and the reflected light of the second light source can reach the image taking assembly, the image taking assembly can take images of the first workpiece and the second workpiece at the same time, and the image taking efficiency is greatly improved.

The utility model provides an integrated mobile robot which comprises a mobile base which is used for moving to any position or pausing at any position according to a received control instruction and determining an orientation angle; the mechanical arm is used for upwards moving the target box body on the material taking position to a material placing position; the camera supporting rod is arranged on a rotating seat of the mechanical arm to rotate along with the rotating seat, or the camera supporting rod is arranged on the movable base, the camera supporting rod is at least provided with a first visual perception module, the first visual perception module comprises a multispectral camera and a laser radar, and the multispectral camera and the laser radar are arranged on the camera supporting rod; the image acquisition module is used for cooperatively realizing image information acquisition of the target box body and the box stack body formed by the target box body. The visual perception module can rotate along with the mechanical arm and can also rotate through the camera supporting rod, the imaging efficiency of the target box body can be improved, and then the grabbing efficiency of the mechanical arm on the target box body is improved.

The utility model relates to an automatic fluorescent channel switching module and a microscopic imaging device with the same, and the automatic fluorescent channel switching module comprises a fluorescent light source generator, a plurality of fluorescent cubes and a moving assembly, the moving assembly comprises a motor, a lead screw fixed to the output end of the motor, a nut connecting piece rotationally connected with the lead screw, a moving plate fixed to the nut connecting piece, a sliding rail and a controller used for controlling the motor. The fluorescent light source generator and the fluorescent cubes are both arranged on the movable plate, the movable plate is in sliding connection with the sliding rail, the multiple fluorescent cubes are arranged side by side, and the arrangement direction of the multiple fluorescent cubes is parallel to the sliding rail. The fluorescence channel automatic switching module disclosed by the utility model can automatically control the position change of the fluorescence cube, realizes rapid and accurate switching among different fluorescence channels, and improves the imaging efficiency and the experiment accuracy.

The invention provides a space target rapid three-dimensional imaging method and system based on active and passive combination, and can be applied to the field of imaging detection. The method comprises steps that based on a target observation line-of-sight direction, an imaging device is utilized to carry out image acquisition on a target object, a vertical image and a horizontal image are acquired, the vertical image is acquired based on an optical camera and a passive optical technology, and a plane where the vertical image is located is vertical to the target observation line-of-sight direction; determining first relative motion information of the target object and the optical camera; determining second relative motion information of the target object and the synthetic aperture laser radar; performing size calibration on the vertical image and the horizontal image according to the first relative motion information and the second relative motion information to obtain a target vertical image and a target horizontal image; and based on the association information between the target vertical image and the target horizontal image, carrying out orthogonal fusion on the target vertical image and the target horizontal image to obtain a target three-dimensional image.

The catheter probe comprises a supporting tube and a transducer unit arranged in the supporting tube, and the transducer unit comprises two bottom plates hinged to each other through a spring hinge, transducers arranged on the two bottom plates respectively, a wedge-shaped block and a pull wire; two supporting seats are arranged in the supporting pipe, and the two ends of a rotating shaft of the spring hinge are installed on the supporting seats. A channel matched with the wedge-shaped block is formed between the two bottom plates, the wedge-shaped block is fixed to a pull wire, and the pull wire can pull the wedge-shaped block to move in the channel in a reciprocating mode so that the field angle of the two bottom plates can be adjusted. By the adoption of the technical scheme, according to the catheter probe, due to the fact that the transducer can achieve multi-direction ultrasonic scanning by adjusting the angle, the catheter does not need to rotate or move too much, and the risk of trauma and injury to the blood vessel when the catheter moves in the narrow, bent or calcified blood vessel can be reduced.

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 present invention discloses a dual-band detector common dewar structure, the dewar includes a window, an upper cavity, a cold shield, a spectroscope, a spectroscope frame, fixing screws, a band one module, a band two module, a flexible cable, a connector, a cold platform, a lower cavity, a column shell and a cold finger. Two detector modules are respectively installed on the cold platform, the spectroscope is glued to the spectroscope frame, the frame after gluing is fixed on the cold platform by screws, and the cold shield is connected to the cold platform; the window is airtightly connected to the upper cavity, the lower cavity is airtightly connected to the column shell and the cold finger, the upper and lower cavities form a vacuum dewar, and the electrical signal is led out through a flexible cable connected to the detector. In this structure, the spectroscope is installed in the dewar, which greatly reduces its own radiation and improves the imaging effect of the detector. The structure is compact and low in cost, and is suitable for the compact integration of low-background dual-band large-scale focal plane detectors.

The invention discloses an image processing method and device, a medium and a program product in the technical field of computers. According to the scheme, on the basis of a live broadcast image and a filter effect reference image corresponding to the live broadcast image, K color correction images are obtained based on the live broadcast image, then N color correction images most similar to the filter effect reference image are selected from the K color correction images, and the N color correction images are synthesized to obtain a color correction composite image; adding a filter effect to the live broadcast image by using the color correction composite image to obtain a live broadcast effect image, so that the live broadcast effect image not only contains key information of the original live broadcast image, but also can be close to the filter effect of the filter effect reference image, and the filter effect of the live broadcast image is ensured; and a user does not need to manually add the filter, so that the imaging efficiency of the filter is also improved.

This utility model relates to the field of medical device technology, and in particular to an intraoral scanning mounting structure and an intraoral scanning device. The intraoral scanning mounting structure includes: a housing with a mounting position, on which a protrusion is provided; an electro-optical component is mounted on the mounting position, and a groove is formed on the circumferential edge of the electro-optical component for the protrusion to extend into, thereby positioning the electro-optical component; an elastic component includes a first elastic member and a second elastic member, which are independently provided. The first elastic member is clamped between the mounting position and a first wall of the electro-optical component, and the second elastic member is clamped between the mounting position and a second wall of the electro-optical component, thus satisfying the installation and fixing requirements while allowing the electro-optical component to move within the mounting position due to thermal expansion and contraction; in the circumferential direction of the electro-optical component, a groove is provided between the portion of the first wall that abuts against the first elastic member and the portion of the second wall that abuts against the second elastic member, thereby ensuring the installation accuracy requirements of the electro-optical component.

The invention relates to the technical field of scanning devices, in particular to a quick response X-ray scanning device based on a micro-electro-mechanical chip, which comprises a detection table, a photoelectric sensor is arranged in the detection table, a plurality of positioning blocks are arranged on the detection table, and a table top of the detection table is used for bearing an object to be imaged; the X-ray source is arranged above the detection table and can emit X-rays to the direction of the detection table, and the X-ray source is connected with a movable support capable of driving the X-ray source to move; the detector is connected with the detection table and can receive the X-rays penetrating through the object to be imaged and convert the X-rays into digital signals; the detection table fixes the position of an object to be imaged through the positioning block, the image acquisition module acquires an image of the detection table, and the control module adjusts the position of the X-ray source according to the position of the object to be imaged on the image so as to completely scan the object to be imaged. By accurately positioning the position of the object to be imaged and standardizing the image of the object to be imaged, the accuracy and reliability of the whole scanning process are improved, and the scanning efficiency and the imaging quality are improved.

The invention belongs to the technical field of cell imaging, and particularly relates to a high-resolution cell tomography method based on a transmission matrix. According to the method, the limitation of a traditional optical microscopy technology is broken through by combining a transmission matrix theory, and accurate imaging of a cell structure is realized under the condition that a sample is not damaged. Through accurate reconstruction and processing of a light field in a scattering medium, challenges caused by light diffraction and multiple scattering can be overcome, and clearer cell structure information is provided. Compared with a traditional imaging method, dyeing or repeated scanning is not needed, and the complexity of sample treatment is reduced. Therefore, the invention provides an innovative solution for the development of the cell tomography technology, and opens up a new direction for the application in the fields of biomedical research, pathological analysis, disease diagnosis and the like.

The present application relates to the technical field of pipeline defect detection, in particular to a frequency-wavenumber domain imaging method suitable for high-temperature pipeline defect detection, which mainly solves the technical problem that the existing FK domain imaging method is difficult to be applied to high-temperature pipeline defect detection imaging. The frequency-wavenumber domain imaging method suitable for high-temperature pipeline defect detection comprises the following steps: signal acquisition; data preprocessing and gated direct wave signal interception; construction of time scale scaling factor; acquisition of frequency-dependent amplitude compensation factor; phase velocity extraction; gated defect echo signal interception, frequency domain transformation, frequency-dependent amplitude compensation and wavenumber domain transformation; Stolt mapping reconstruction; two-dimensional inverse Fourier transformation; normalization and image display. The imaging method effectively improves the imaging efficiency and significantly improves the imaging position error and focusing state.

The invention belongs to the technical field of geophysical exploration, and discloses a ground-air transient electromagnetic attenuation field imaging method based on a complex terrain, which simulates a ground-air transient electromagnetic scene, constructs a model with terrain resistivity for an exploration target area, and performs electromagnetic field finite volume numerical simulation on the model to obtain a ground-air transient electromagnetic attenuation field. Calculating diffusion field induced electromotive force distribution under different half-space resistivity conditions; and then, constructing a loss function of two norms of the induced electromotive force and the observed induced electromotive force under the condition of uniform background resistivity, and searching the optimal background resistivity to enable observation data to reach the minimum value after deducting diffusion field information, thereby extracting an attenuation field for imaging. According to the method, the influence of diffusion information and terrain in a secondary field in the transient electromagnetic method can be effectively removed, the spatial distribution difference of an attenuation field is highlighted, rapid imaging of three-dimensional transient electromagnetic data can be realized, the influence of complex terrain on transient electromagnetic inversion imaging is avoided, and the detection efficiency and reliability of the transient electromagnetic method are improved.

The invention discloses a radiography auxiliary device for the imaging department, and relates to the field of medical instruments, the radiography auxiliary device comprises a catheter used for conveying radiography liquid, and further comprises a supporting assembly used for supporting the catheter, the supporting assembly comprises a supporting sleeve A and at least two guiding pieces A, and the guiding pieces A are arranged in the supporting sleeve A; according to the radiography auxiliary device for the imaging department, the uterus expanding mechanism is arranged, the driving assembly drives the push plates in the multiple opening assemblies to rotate around the axis of the rotating shaft, the multiple push plates are arranged in a circumferential array mode with the axis of the A supporting sleeve as the center, the multiple push plates rotate to open the cervix, and under wrapping of the wrapping piece, the cervix can be expanded, so that the cervix can be expanded. The push plate is prevented from being in direct contact with the inner wall of the cervix uterus, pain of a patient is reduced, after the cervix uterus opening of the patient is opened, a medical worker pushes the catheter, and the catheter moves in the axial direction of the A supporting sleeve under the limitation of the A guiding piece, so that the catheter is inserted into the uterus of the patient, and the radiography efficiency is improved.

The invention provides a single-shot imaging device and method based on grating coding and optical Kerr gate gating, and the device comprises to-be-measured signal light, an optical beam splitter, a time delay adjustment module, a grating coding module, an optical beam combiner, an optical Kerr gate and an imaging module which are sequentially arranged in the laser transmission direction. The frequency domain identification and analysis module is connected with the imaging module; splitting the to-be-measured signal light passing through the optical beam splitter into a plurality of sub-beams; respectively setting time delay for each sub-beam by using a time delay adjusting module; performing modulation coding on each sub-beam by using a grating coding module; performing gating of different time slices on each sub-beam through an optical Kerr gate; recording the gated composite light field information on an imaging module; the composite light field information is processed through the frequency domain recognition and analysis module, light field information of different time slices is recovered, the system is suitable for research of non-repetitive and difficult-to-reproduce ultrafast phenomena, the imaging efficiency is greatly improved, and the ultrafast time resolution capability is achieved.

The invention relates to the technical field of cardiology contrast agent processing, and particularly discloses a contrast agent processor which comprises an outer machine shell and a mixing bin arranged in the outer machine shell, a control panel is installed on the outer side of the bottom of the outer machine shell, and the bottom end of the mixing bin is connected with an injection machine; the device further comprises a containing bin, the containing bin is fixedly arranged at the top of the outer machine shell at equal angles, a sliding block capable of sliding up and down is installed at the bottom of the containing bin, a pricking needle is installed at the top of the sliding block, and the bottom end of the pricking needle communicates with the top of the mixing bin through a suction pipe. The top covers are rotationally installed on the two sides of the top of the outer machine shell, and sealing gaskets are arranged at the bottoms of the top covers. According to the contrast agent processor, a contrast agent raw material solution can be directly subjected to water bath heating on the raw material bottle, the raw material solution can be automatically sucked, pollution is reduced, it is guaranteed that the contrast agent is evenly mixed and used, heating and injection use are convenient, and cardiac contrast efficiency is improved.

The invention belongs to the technical field of SAR imaging, and particularly relates to an airborne SAR long-distance high-resolution imaging method, which is a method for carrying out long-distance high-resolution SAR imaging on a ground scene by an airborne radar, and solves the problem of range ambiguity caused by cross-period sampling through alternate orthogonal waveform transceiving processing. The time delay of an echo sampling window is adjusted in real time according to the distance change of a radar and an imaging scene, the range unit migration of an echo signal is corrected, the range direction sampling data volume is reduced, an azimuth filtering downsampling method is adopted, the SAR imaging azimuth direction processing data volume is reduced, the imaging efficiency is improved, work can be carried out at a high radar pulse repetition frequency, and the imaging efficiency is improved. The method improves the radar duty ratio, reduces the requirement for the pulse width of a transmitted signal, simplifies the radar design, can achieve the long-distance high-resolution imaging of a ground scene, and reduces the demands for radar energy storage, signal processing and other hardware resources.

The present invention relates to an eye-in-hand robot positioning system and method based on a rotating cascade prism, the system comprising a visual system, a robot and a host computer; the host computer is connected to the robot and the visual system respectively; the robot and the visual system are connected; the visual system comprises a prism drive component, a rotating cascade prism and a camera; the host computer is used to receive data collected by the optical imaging component, and perform data processing, calculate the three-dimensional coordinates of the target, and thus issue instructions to the robot to realize the target tracking function. The present invention introduces a rotating cascade prism multi-view imaging method, which effectively expands the imaging field of view without any movement of the camera body, simplifies the target calibration process, improves the calibration accuracy and stability, and realizes the robot's three-dimensional perception and target positioning. Compared with the prior art, the present invention has the advantages of a large imaging field of view, a large robot visual working space and high imaging efficiency.

The present invention provides a full-matrix efficient imaging method of an ultrasonic phased array for curved parts, which performs classification, extrapolation and imaging according to whether the sound velocity changes in the horizontal direction of each layer. For a uniform dielectric layer, the wave field of the layer in the frequency wavenumber domain obtained by extrapolation is directly used for imaging; for a non-uniform dielectric layer, it is necessary to convert the wave field of the layer in the frequency wavenumber domain obtained by extrapolation into the frequency space domain and then apply a compensation operator in the horizontal direction to obtain the wave field of the current layer in the frequency space domain, and then image the wave field of the current layer in the frequency space domain. The above-mentioned classification imaging method can not only ensure the quality of the imaging results of the non-uniform dielectric layer, but also improve the overall imaging efficiency. In addition, there are only two operators, superposition and Fourier transform, in the imaging conditions of the two cases, which greatly reduces the memory requirements and calculation complexity, and shortens the calculation time.

The invention relates to the technical field of millimeter wave near-field imaging, in particular to a sparse MIMO array near-field imaging method based on distance quantization coding acceleration, and the method comprises the steps: obtaining original echo data; the pre-calculated pulse peak index and the phase compensation item are subjected to compression coding and fixed-point quantization and are pre-stored in a high-speed storage resource; performing oversampling and pulse compression on the echo data; according to the current pixel point and the antenna pair serial number, peak position data and a phase compensation item are extracted from the pre-calculation result for phase compensation, and a phase compensation result is obtained; and traversing all antenna pairs to obtain a reconstruction value of the current pixel point, and traversing all pixel points in the target imaging scene to obtain a final imaging result. Therefore, the problem that time consumption of non-linear calculation in a related BP method is large is solved, operation codes related to non-linear variables can be effectively quantized and pre-stored in high-speed storage resources, and the method is suitable for hardware acceleration.