27 results about "Correlative imaging" patented technology

A super-resolution single-objective light-sheet optical microscopy system and method, and a related imaging system, are configured to generate two light sheets that are guided to a single objective. The single objective is configured to allow the two light sheets to transmit through same and interfere with each other to generate structured light fringe regions. The single objective is further configured to receive a fluorescence signal that is recorded by a fluorescence detection module.

This disclosure pertains to the field of exploration geophysics and presents a method and system for combined active and passive source reverse time migration imaging of metallic minerals. The method includes: performing time difference correction on active and passive source seismic data from the same subsurface structure; performing wavefield separation on the time-aligned active and passive source seismic data to reconstruct the P-wave and S-wave fields of the active source and the passive source; performing active and passive source wavefield extrapolation based on the two-way wave equation; obtaining active and passive source PS-converted wave imaging results using cross-correlation imaging conditions; and performing weighted superposition and fusion to obtain the combined active and passive source imaging results. This disclosure leverages the high resolution advantage of active sources combined with the deep detection capability of passive sources, replacing the limitations of single-source detection and achieving high-precision deep reverse time migration imaging.

The invention provides a sub-meter buried unexploded ordnance detection and identification method based on correlation three-dimensional magnetic imaging, and the method comprises the steps: obtaining ground surface magnetic anomaly measured data and corresponding trajectory data of a detection region, and dividing a local anomaly region according to a magnetic anomaly change rate; dividing the underground space corresponding to the local abnormal region into three-dimensional grids based on the local abnormal region, calculating the theoretical magnetic anomaly of each grid node based on a magnetic dipole model, obtaining a normalized local correlation coefficient point by point with the measured data of the magnetic anomaly, and reserving nodes higher than a preset threshold as candidate nodes; taking error minimization between theoretical magnetic anomaly of the candidate node and magnetic anomaly measured data as a fitness function, and obtaining an optimal magnetization parameter and an optimal local correlation imaging coefficient based on particle swarm optimization iterative optimization; and based on the optimal local correlation imaging coefficient, carrying out integration according to a spatial position, generating a three-dimensional magnetic imaging result of the detection area, and obtaining a contour parameter and a spatial position of the sub-meter buried unexploded ordnance.

The invention relates to a method (30) for characterising a camera module (4) comprising a lens (6) and a sensor (8), the lens (6) belonging to a predetermined family of lenses associated with a particular target geometry, the characterisation method (30) including the steps of: - obtaining (32) configuration data which are indicative of a current configuration of the camera module and comprise: • at least one production parameter which is representative of an actual geometry of the lens (6); and / or • at least one use parameter which is representative of current image-acquisition conditions of the camera module (4); and - calculating (34) a current optical transfer function, which is associated with the current configuration of the camera module (4), from: • obtained configuration data; and • a predetermined estimation function (16) which is associated with the family of lenses and takes, as input, configuration data, and provides, as a result, a corresponding estimated optical transfer function.

The application discloses a two-way wave migration imaging method based on a Muller model and a VTI medium, adopts a thin plate division idea to divide a model into thin plates, obtains a positive transmission down-going migration wave field and a positive transmission up-going migration wave field of each thin plate based on a seismic source calculation, then obtains a reverse transmission down-going migration wave field and a reverse transmission up-going migration wave field based on a seismic record, finally obtains all imaging results by using a cross-correlation imaging condition, and in addition, the Muller model is used as an absorption attenuation model, which is different from the existing Kolsky-Futterman model, can further avoid the problem that the existing model cannot accurately satisfy the minimum time delay criterion, can utilize down-going migration wave field information and up-going migration wave field information through the above process, and can correct the influence of anisotropic parameters on migration imaging results and compensate the amplitude attenuation problem of seismic waves through two one-way migration operators, so that the migration imaging precision of steep dip structures is effectively improved.

A working-range-extending phase plate includes a central region, an inner annular region surrounding the central region, and an outer annular region surrounding the central region and the inner annular region. The central region has a central phase-transmission function. The inner annular region has an inner phase-transmission function. The outer annular region has an outer phase-transmission function. Respective magnitudes of the central, the inner, and the outer phase-transmission functions are, as a function of radial distance from an optical axis of the phase plate, one of: (i) constant, increasing, and increasing, (ii) decreasing, constant, and increasing, or (iii) decreasing, decreasing, and constant.

A working-range-extending phase plate includes a central region, an inner annular region surrounding the central region, and an outer annular region surrounding the central region and the inner annular region. The central region has a central phase-transmission function. The inner annular region has an inner phase-transmission function. The outer annular region has an outer phase-transmission function. Respective magnitudes of the central, the inner, and the outer phase-transmission functions are, as a function of radial distance from an optical axis of the phase plate, one of: (i) constant, increasing, and increasing, (ii) decreasing, constant, and increasing, or (iii) decreasing, decreasing, and constant.

The invention discloses a time migration method for a three-dimensional pre-stack wave equation in an imaging ray domain, which relates to the technical field of exploration geophysics and comprises the following steps of: deducing a bidirectional acoustic wave equation in an imaging ray coordinate system based on a Riemann wave field extrapolation theory in a three-dimensional semi-orthogonal coordinate system; an equation is directly solved by adopting a finite difference method, extrapolation of a seismic source and a receiving end wave field is achieved, and errors caused by Green function approximation in a traditional migration method are avoided; and generating a pre-stack time migration result by applying a zero-lag cross-correlation imaging condition. Through first-order linear disturbance approximation, an accurate three-dimensional time-depth conversion partial differential equation set is simplified into an optimized layer stripping algorithm, and a corresponding equation suitable for a weak transverse velocity change medium is deduced. According to the invention, the working process of three-dimensional wave equation time migration is realized in an imaging ray coordinate system, and an accurate seismic imaging result is generated; two-dimensional plane hypothesis limitation is avoided, and high-precision imaging technical guarantee is provided for seismic data processing of a complex structure area.

The invention provides a method and a device for correlated imaging of a biological sample, and the method comprises the following steps: freezing and fixing the biological sample, and directly converting water in cells or tissues of the biological sample into a glassy state to obtain a frozen biological sample; performing electron microscope imaging on the frozen biological sample, and determining a to-be-cut position of the frozen biological sample; the optical signal intensity corresponding to the to-be-cut position meets a preset condition; optical imaging is conducted on the to-be-cut position, three-dimensional optical image data are obtained, and the three-dimensional optical image data comprise specific optical information of the to-be-cut position; performing continuous cutting on the to-be-cut position, and performing two-dimensional electron microscope imaging on a cut exposed surface to obtain a plurality of electron microscope images; and reconstructing the plurality of electron microscope images into a three-dimensional electron microscope image, and carrying out correlated imaging on the three-dimensional optical image data and the three-dimensional electron microscope image to obtain the three-dimensional ultrastructure of the biological sample.

The invention discloses a two-way wave migration imaging method based on a Muller model and a VTI medium, and the method comprises the steps: dividing a model into a plurality of thin plates through employing the thought of thin plate division, and obtaining a forward transmission downlink migration wave field and a forward transmission uplink migration wave field of each thin plate through calculation based on a seismic source; a back propagation downlink offset wave field and a back propagation uplink offset wave field are obtained based on seismic records; and finally, obtaining all imaging results by using a cross-correlation imaging condition. In addition, a Muller model is adopted as an absorption attenuation model which is different from an existing Kolsky-Futterman model, so that the problem that the existing model cannot accurately meet the minimum time delay criterion can be further avoided; through the process, not only can downlink offset wave field information be utilized, but also uplink offset wave field information can be utilized; a two-way wave migration operator is formed through two one-way migration operators, the influence of anisotropic parameters on the migration imaging result can be corrected, meanwhile, the amplitude attenuation problem of seismic waves can be compensated, and finally the migration imaging precision of the steep dip angle structure is effectively improved.

A system and method for generating geometric dimensions of a syringe or plunger stopper are provided. The geometric dimensions may be based on at least one image of at least a part of the syringe or plunger stopper. A fixture for positioning the syringe or plunger stopper in close proximity to an associated imaging device is also provided.

A hyperspectral imaging device and method disclosed herein overcomes technical problems associated with the prior art by replacing the intensity measurement performed by the single high-resolution 2D sensor of state-of-the-art methodologies, with the measurement of intensity (fluctuation) correlations retrieved by two high-resolution 2D sensors: one—the imaging / spatial sensor dedicated to polychromatic image acquisition, the other—the spectral sensor dedicated to pure spectral measurement. In the hyperspectral correlation imaging disclosed herein, the spectral information is encoded into the intensity correlation without requiring any spectral scanning. Even though multiple exposures (frames) are generally required to reconstruct light statistics and perform correlation measurements, the exposure times are several orders of magnitude shorter than those required in the scanning approach. In addition, no changes of the device are required during such multiple exposures, which simplifies the optics / optomechanics of the device and avoids further time consumption.

The disclosed embodiments include systems and methods for producing hyperpolarized molecules of interest (such as hyperpolarized biorelevant imaging agents), in clinically relevant polarizations, concentrations, volumes, and purity. Disclosed embodiments provide technical improvements in polarizing molecules of interest in solution. These technical improvements support increases in molecule of interest concentration and the degree of polarization.

The invention discloses a wood foreign matter space positioning system based on X-ray detection, which relates to the technical field of wood detection and comprises a first X-ray light source, a second X-ray light source, a first detector, a second detector and a data acquisition board electrically connected with the first detector and the second detector. According to the method, the related imaging principle of X-rays is applied, a linear array scanning imaging system is adopted to carry out online detection on the wood plate blank passing through a channel, foreign matters in the wood plate blank can be rapidly detected through an AI algorithm, automatic analysis and calculation are carried out through respective imaging results of two angles, and the spatial position of the foreign matters on the wood plate blank is determined; the system adopts two X-ray emitters and two high-efficiency detectors, the accuracy is improved through cross validation and distortion correction of the double detectors, equipment can be guided to avoid foreign matters, safety is guaranteed, processing waste products can be reduced, and labor and equipment maintenance cost is reduced.

An imaging method and an associated imaging system (100, 200) are disclosed herein. The imaging method comprises:-providing an array of light sources, each source being configured for the output of a light emission,-providing an imaging unit (2) comprising a focusing element (L0) and a detector (DT), the detector being configured to detect the light emission 10 from the sources of the array by means of the focusing element (L0),-providing an object (OBJ) between the detector (DT) and the array of light sources, providing an imaging device (IL, FFL) 15 between the array of light sources and the object (OBJ), -operating the array of light sources (SRC ') by activating the light sources according to a sequence pattern, whereby, according to said sequence pattern, the position of the activated light sources in the array relative to the 20 object (OBJ) varies with the activation of the light sources,-imaging the array of light sources by said imaging device (IL, FFL) while operating the array of light sources 25, detecting, by 30 imaging devices (IL, FFL) and by focusing elements (L0), on said detector (DT), the spatial positions of images (I1-In) of points of said object (OBJ) formed at different positions of the activated light sources in the array, and the offset (O1-On) 27, 27, 27 ') of each detected spatial position with respect to a reference spatial position (x); -reconstructing an image of the object (OBJ) by aligning images of points of said object (OBJ) formed at different positions of the activated light sources in the array by deviating from each detected spatial position from a reference spatial position (x).

The application discloses a VTI medium double-way wave migration imaging method based on De Wolf approximation, and comprises the following steps: firstly, dividing a model into multiple thin plates; then, based on a seismic source, sequentially calculating and obtaining a positive transmission down-going migration wave field and a positive transmission first up-going migration wave field of each thin plate from a minimum depth to a maximum depth; then, calculating a positive transmission up-going migration wave field of each thin plate at different positions from the maximum depth to the minimum depth and adding the reserved positive transmission first up-going migration wave field, so as to finally obtain the positive transmission up-going migration wave field of all the thin plates; then, based on seismic records, obtaining reverse transmission down-going and up-going migration wave fields according to the above calculation process; finally, obtaining all imaging results by using a cross-correlation imaging condition. Not only the down-going migration wave field information can be used, but also the up-going migration wave field information can be used; a double-way wave migration operator is formed by two one-way migration operators, the influence of anisotropic parameters on migration imaging results can be corrected, and finally the migration imaging precision of steeply dipping structures is effectively improved.

The invention is suitable for the technical field of computer vision, and provides a time self-correlation imaging method and system based on an adaptive orientation space window. The speckle contrast imaging and self-correlation imaging method comprises the following steps: acquiring continuous multi-frame speckle images; the method comprises the following steps: presetting a basic space window by taking a target pixel as a center, and giving a plurality of orientations; selecting a certain frame of speckle image, respectively extracting speckle light intensity sequences of corresponding orientations in the basic space window, and calculating the spatial domain variance of the light intensity sequence of each orientation; selecting the orientation with the maximum light intensity variance, and determining the orientation as an effective calculation window of the target pixel; and performing time autocorrelation function calculation based on the effective calculation window so as to solve a blood flow velocity parameter of the target pixel. According to the method, the noise of the blood flow area can be reduced, and the real-time monitoring requirement is met while the high spatial resolution is guaranteed.

The invention belongs to the field of exploration geophysics, and relates to an active and passive source combined reverse time migration metal mine converted wave imaging method and system, and the method comprises the steps: carrying out the time difference correction of active source seismic data and passive source seismic data of a same underground structure; respectively carrying out wave field separation on the active source seismic data and the passive source seismic data after time alignment, and reconstructing a P-wave field and an S-wave field of the active source and a P-wave field and an S-wave field of the passive source; performing active source wave field extrapolation and passive source wave field extrapolation based on a two-way wave equation; obtaining an active source PS converted wave imaging result and a passive source PS converted wave imaging result by using a cross-correlation imaging condition; carrying out weighted superposition fusion to obtain an active and passive source combined imaging result; according to the invention, the high resolution advantage of an active source and the deep detection capability of a passive source are combined, the limitation of single-source detection is replaced, and high-precision deep reverse time migration imaging is realized.

Disclosed herein are histone deacetylase imaging agents for positron emission tomography and related imaging methods using the histone deacetylase imaging agents. The histone deacetylase imaging agents may be a compound of formula (I):wherein R1 is a moiety including a positron emitter; R2 represents hydrogen, or substituted or unsubstituted alkyl, or substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl; and n is an integer selected from 0 or 1. In one version of the compound of formula (I), R1 is a moiety including an adamantyl group.

A hyperspectral imaging device (1, 100, 200, 300, 400; 500; 600; 700; 800) and method are disclosed herein. The device and method for hyperspectral imaging disclosed herein overcome the technical problems of the prior art by replacing the intensity measurement performed by a single high-resolution 2D sensor of the prior art methods with a measurement of the intensity (fluctuation) correlation retrieved by two high-resolution 2D sensors: one is an imaging / space sensor (4, 204, 304, 404; 504; 604; 704; 804) dedicated to polychromatic image acquisition, the other is a spectral sensor (5, 205, 305, 405; 505; 605; 705; 805) dedicated to pure spectral measurement. In the hyperspectral correlation imaging according to the present application, the spectral information is encoded as intensity correlation without any need for spectral scanning. Even if multiple exposures (frames) are usually needed to reconstruct the light statistics and perform the correlation measurement, the exposure time is several orders of magnitude shorter than the time needed in the scanning methods; moreover, there is no need to change the device during such multiple exposures: this simplifies the optical / optomechanical mechanism of the device (1, 100, 200, 300, 400; 500; 600; 700; 800) and avoids further time consumption.

A method for extending a working range of an imaging system having an optical axis and an aperture stop includes imparting a wavefront aberration on an optical beam, propagating through the aperture stop, that is representable as an expansion of orthonormal circular Zernike polynomials having non-zero coefficients A11, A22, and A37. A working-range-extending phase plate imparts a wavefront aberration on an optical beam, propagating therethrough, that is representable as an expansion of orthonormal circular Zernike polynomials having non-zero coefficients A11, A22, and A37.

The application discloses an optimization method and device for viscoacoustic wave reverse-time migration imaging. The method comprises the following steps: under the constraint of a velocity model and a constant Q model of a target block, forward simulation of seismic waves in a stratum is carried out by using a viscoacoustic wave equation to obtain wave field forward simulation records at each time; based on a compensation operator, the wave field forward simulation records at each time are reverse-time extended, and wave field separation is carried out by using a wave field separation condition to obtain upgoing wave fields and downgoing wave fields; the upgoing wave fields and the downgoing wave fields are correlated and imaged by using a cross-correlation imaging condition to obtain reverse-time migration imaging results of the seismic waves; and the reverse-time migration imaging results are optimized according to an X-type operator to obtain optimized reverse-time migration imaging results. The attenuation problem of the propagation of the seismic waves in a viscoelastic medium can be solved, and more accurate reverse-time migration imaging results can be obtained.

Imaging systems and associated imaging methods are described. One example imaging system includes a lens positioned to receive a light associated with a scene, and a first spatial mode sorter positioned along an optical path to receive the light from the lens and to demultiplex the incident light incident. The imaging system also includes an occulting mask, and a second spatial mode sorter. The occulting mask is positioned between the first spatial mode sorter and the second spatial sorter to inhibit one or more predetermined modes of the first multiplexed light from propagating towards the second spatial sorter, the second spatial mode sorter is configured to recombine light received thereon to produce an output light for detection by an imaging detector, the output light allows for detection by the imaging detector of features in the scene that are separated by a distance that is below a Rayleigh diffraction limit.

Techniques are disclosed for facilitating multi-etch detector pixels fabrication. In one example, a method includes forming a semiconductor structure. The semiconductor structure includes a substrate layer, an absorber layer disposed on the substrate layer, a barrier layer disposed on the absorber layer, and a first contact layer disposed on the barrier layer. The method further includes forming the pixels from the semiconductor structure. The forming of the pixels includes performing a first etching operation to remove a portion of at least the first contact layer, and performing a second etching operation to remove a portion of the barrier layer and a portion of the absorber layer. Each of the pixels includes a respective portion of each of the substrate layer, the first contact layer, the barrier layer, and the absorber layer. Related systems and devices are also provided.

A computer implemented method of catheter data dependent visualization and / or imaging and a corresponding medical system is presented. The method comprises the steps acquiring a vascular data set, which represents a segmented tubular structure, preferably a segmented vessel tree, of a patient's anatomy (step S1), wherein the segmented tubular structure is partitioned in the vascular data set in several different parts, the method further comprising the steps receiving catheter data, which are position data and / or velocity data of a catheter (step S2), determining, based on the received catheter data and the acquired vascular data set, in which of said several different parts of the segmented tubular structure the catheter is located (step S3), and generating, based on a result of the determination of step S3, a visualization instruction signal for visualizing medical imaging data in said determined part of the segmented tubular structure to a user (step S4a) and / or generating, based on a result of the determination of step S3, an imaging instruction signal for setting one or more imaging parameters to be used for said determined part of the segmented tubular structure (step S4b).