58 results about "Point spread" patented technology

The invention discloses a Fourier finite difference deconvolution imaging method based on inclination angle adaptive noise suppression, and relates to the technical field of geophysical exploration of petroleum. The method specifically comprises the following steps: designing a scattering point speed model to solve a partial point spread function of an underground space; solving a partial point spread function by a speed disturbance method; solving point spread functions of all positions of the underground space by carrying out Gaussian filtering technology and inverse distance weighted interpolation on part of the point spread functions; using a plane wave destruction method to solve the inclination angle attribute of the work area, and constructing an inclination angle self-adaptive diagonal diffusion Fourier finite difference migration method based on the inclination angle attribute to solve a high-quality initial image suitable for an inversion system; and performing multi-dimensional deconvolution in the wave number domain to obtain a final migration imaging result. According to the method, the point spread function is successfully introduced into Fourier finite difference imaging, and the resolution and deep amplitude of a conventional Fourier finite difference imaging method can be effectively improved.

The invention relates to a 3D disordered microstructure-based lens for regulating and controlling point diffusion in a partitioned manner to inhibit ocular axis growth and a preparation method thereof, and belongs to the technical field of ocular optics and myopia prevention and control. The unordered dynamic micro-structure lens comprises a lens base body and an unordered dynamic micro-structure layer arranged on the lens base body, a point spread function is processed on the inner surface of the lens base body, the disordered dynamic microstructure layer comprises a plurality of microstructure units which are non-periodically arranged in space, and phase modulation and scattering are carried out on incident light so as to regulate and control the point spread function of imaging on the inner surface of the lens; the optical characteristics of the microstructure units can dynamically change in response to external stimulation, so that the form of the point spread function of the inner surface of the lens is dynamically adjusted, and a dynamic stimulation signal for inhibiting eye axis growth is provided for the retina. A disordered dynamic microstructure is introduced, a point spread function (PSF) of light entering the eye is intelligently regulated and controlled, and dynamically-changing, non-periodic and optimized optical signal distribution is formed around the retina, so that the growth of the axis of the eye is more effectively inhibited.

The invention discloses an image processing method and system based on a deconvolution algorithm, and a storage medium. The method comprises the steps of obtaining image data of a blurred image; generating a plurality of matched point spread functions through an optical microscopic system for capturing a blurred image; selecting an optimal point spread function and a preset number of iterations from the plurality of point spread functions; preprocessing the selected optimal point spread function; fourier transform is carried out on the point spread function through butterfly operation, and Fourier transform is carried out on the blurred image; performing deconvolution operation by using an iterative solution mode to obtain a target image; judging whether the number of iterations is reached or not; if yes, outputting a final target image; and if not, continuing repeated iteration until the number of iterations is reached, and outputting a final target image. According to the method, the limitation degree of the image is not high, the image information is not easy to lose, the requirement on equipment performance is low, the algorithm is optimized, the operation efficiency is improved, and the burden of equipment and resources is reduced.

The invention discloses an active detection method for co-phase errors of a phase shift modulation planar diffraction spliced telescope, and belongs to the technical field of optical imaging telescopes. According to the method, a laser emits a beacon light source at the focal point of a spliced telescope and reversely irradiates a primary mirror of the telescope, a beacon light beam passes through the rear surface of the primary mirror, is reflected by a front surface, then passes through the rear surface and returns along an imaging light path, and a phase shift modulator applies a specific delay phase to a reference aperture. Point spread functions under different modulations are collected through a camera so as to solve co-phase errors of the system, and co-phase error correction is carried out through a phase shift modulator. According to the method, the semi-transparent and semi-reflecting mirror is used for dividing an imaging light path into two parts, the laser is arranged at the other focus, the original telescope imaging light path does not need to be damaged, an external light source does not need to be additionally introduced, and the practicability of the system is improved.

The invention discloses a non-linear machine learning frequency spectrum fusion super-resolution imaging method based on gradual saturation, and the method enables a point spread function of emitted light (namely fluorescence) to be gradually transited from an annular shape to a Gaussian shape through adjusting the power of excitation light, thereby effectively extracting the specific spatial frequency information in an image. Meanwhile, by combining a deep recursive residual network (DRRN), the series of gradually saturated point spread functions are fused into full-space frequency spectrum information, so that the imaging speed which is twice that of a traditional method and high-quality super-resolution nanometer microscopic imaging are realized. An example verifies that under the condition of low excitation power, 33nm spatial resolution imaging of a single up-conversion nanoparticle is realized. The invention not only simplifies the construction of an optical system, but also opens up a new way for high-quality and low-phototoxicity super-resolution microscopic imaging.

This application belongs to the field of image processing and specifically discloses an imaging simulation method, device, and electronic device based on a point spread function. The method includes: establishing a light source model corresponding to an image captured by an optical system, obtaining the point spread function of the point light source of the light source model after being acted upon by the optical system; obtaining error point spread functions under different optical system models; performing weighted averaging of each error point spread function according to preset weights to obtain a comprehensive point spread function; forming an array diagram of the comprehensive point spread function according to light distribution, convolving the array diagram with the captured image to obtain a degraded image that simulates the blurring effect caused by aberrations; applying a distortion model of the optical system to the captured image to obtain a deformation effect image that simulates the distortion, and implementing imaging simulation of the optical system based on the deformation effect image and the degraded image. This application can improve imaging accuracy and efficiency.

Biosensor including an array of reaction sites and corresponding light sensors may experience crosstalk in which photons from one reaction site are detected by neighbors of its corresponding light sensor, and such crosstalk may be corrected using sharpening kernels corresponding to the sensors in the array. Such sharpening kernels may be derived from point spread functions, which may be determined in real time analysis based on images captured during sequencing.

The application provides a vehicle-mounted lens transmission image correction method and device and medium, and relates to the technical field of image processing. The method comprises the following steps: taking a transmission image photographed by a vehicle-mounted lens, obtaining target speed information of the vehicle-mounted lens within an exposure time of photographing the transmission image, obtaining N, uniformly dividing the exposure time into N target time slices, obtaining a target vehicle-mounted lens pose corresponding to each target time slice based on the target speed information, determining a target point spread matrix based on the target vehicle-mounted lens pose corresponding to each target time slice, processing the transmission image by using the target point spread matrix, and obtaining a target clear image. The method balances the calculation efficiency and the clarity of the transmission image.

To provide an all-in-focus image generation method, an all-in-focus image generation apparatus, and an all-in-focus image generation program capable of generating an all-in-focus image simply and accurately.SOLUTION: A method MT1 includes: an original image acquisition step (Step ST1) of acquiring an original image for each focal position related to a target object; a point spread information calculation step (Step ST4) of calculating point spread information regarding the original image for each focal position; a focal position determination step (Step ST3) of determining focal positions of pixels based on the original image for each focal position; a focal position correction step (Step ST5) of correcting the focal positions of the pixels based on the point spread information; and an all-in-focus image generation step (Step ST6) of extracting pixels corresponding to the corrected focal positions of the pixels and generating an all-in-focus image by integrating the extracted pixels.SELECTED DRAWING: Figure 4

This application discloses a design method for an optoelectronic imaging system with laser protection and privacy protection functions, relating to the field of optoelectronic imaging. The method includes: determining an optimized point spread function based on preset point spread distribution characteristics, target energy divergence, and point spread radius using an optical-algorithm joint optimization framework; determining an initial phase distribution based on imaging parameters using the Gerchberg-Saxton algorithm; adjusting the initial phase distribution using a stochastic gradient descent algorithm, guided by the difference in energy divergence of the point spread function, to determine the optimized phase distribution corresponding to the optimized point spread function; and using the optimized phase distribution to load the phase modulation component of the optoelectronic imaging system. This application can achieve high-quality optoelectronic imaging with laser protection and privacy protection capabilities.

The present application relates to the field of astronomical transient source identification combining astronomy and artificial intelligence, and when performing the task of identifying transient sources in the massive data generated by a large-field high-sampling-rate telescope, the existing methods usually use a single classification model relying on image data only, which is difficult to cope with complex and changeable data. The present application proposes an astronomical transient source identification method with dynamic updating of a multi-modal model, which constructs a multi-modal model for classification by combining image data, point spread functions and physical information; combined with artificial review, selects samples with classification errors and possible transient source candidates, and stores them as a new sample set; by injecting the new sample set into the original training set and loading the last trained weights for retraining, the dynamic adjustment and optimization of the model are realized. This method can effectively cope with the massive data generated by a large-field high-sampling-rate telescope, and ensure that the model always maintains efficient and accurate identification performance under complex background and weak signals.

The invention provides an ultrathin diffraction prescription lens acceptance report output method and system, a storage medium and equipment applied to the field of lens manufacturing and quality acceptance, and the method comprises the steps: building a cross-wavelength and cross-field image quality evaluation model through defining a field-of-view sampling point set; and calculating or measuring a point spread function, a modulation transfer function, distortion and stray light and ghost image budget indexes, and feeding back measurement data such as manufacturing tolerance, residual layer difference and warping to an optimizer, thereby realizing closed-loop consistency of the whole process of'design-manufacturing-measurement-acceptance '. The system can output an acceptance report containing failure reason code mapping, threshold version information, an original data hash abstract and a digital signature, and provides support for gating decision and traceable auditing in the mass production process. According to the scheme, through the closed-loop mechanism, the consistency and traceable gating of all links of design, manufacturing, metering and acceptance are ensured.

Systems and techniques for image correction are provided. For example, a process may include obtaining image data of an image from a sensor coupled to a super lens; obtaining a plurality of point spread functions (PSFs), wherein the plurality of PSFs represent a light pattern generated by the superlens at a position along an axis of the image; dividing the image into a sub-image set; determining a local PSF of a sub-image in the set of sub-images based on the plurality of PSFs; and performing deconvolution on the sub-image based on the local PSF of the sub-image.

The invention relates to the technical field of lenses, and discloses an annular point diffusion lens based on an energy distribution model, which comprises a lens substrate, a central clear area and an annular point diffusion structure area, and is characterized in that the annular point diffusion structure area is composed of a first annular point diffusion structure area, a second annular point diffusion structure area and a third annular point diffusion structure area, the first annular point diffusion structure area, the second annular point diffusion structure area and the third annular point diffusion structure area are distributed in a concentric annular mode from inside to outside with the central clear area as the center and are all borne on the lens base material, the central clear area is not provided with a micro-lens structure, and the annular point diffusion structure areas are designed in a gradient mode through micro-lens parameters. A defocusing signal conforming to an energy distribution model is directly generated, peripheral quantitative defocusing is achieved, the first annular point diffusion structure region generates a weak defocusing signal, the second annular point diffusion structure region generates a middle defocusing signal, and the third annular point diffusion structure region generates a strong defocusing signal.

Biosensor including an array of reaction sites and corresponding light sensors may experience crosstalk in which photons from one reaction site are detected by neighbors of its corresponding light sensor, and such crosstalk may be corrected using sharpening kernels corresponding to the sensors in the array. Such sharpening kernels may be derived from point spread functions, which may be determined in real time analysis based on images captured during sequencing.

The invention discloses an image processing method, a display method, a device and a medium applied to a video perspective head-mounted display device, the device comprises an eye movement tracking module, a depth sensing module and an external scene camera, the processing method comprises the following steps: acquiring a fixation point of a user through the eye movement tracking module, acquiring a fixation depth through the depth sensing module, and displaying the fixation depth through the external scene camera; shooting a real image through an external scene camera; determining a first target point spread function corresponding to the fixation point and the fixation depth according to a first mapping relation library, wherein the first mapping relation library comprises first point spread functions of the external scene camera at different simulated fixation points and simulated fixation depths; deblurring the real image based on the first target point spread function to obtain a deblurred image; and fusing and pre-correcting the deblurred image and the virtual image to obtain a pre-corrected fused image. According to the scheme disclosed by the invention, the problem of aberration coupling of multiple optical paths is solved through deblurring of the real image and pre-correction of the display optical path, and the quality of the fused image is improved.

This improves the practicality of depth estimation of subjects using encoded imaging. [Solution] In an imaging device that performs encoded imaging, the processor performs the following processes: storing the captured image in memory; decoding the captured image based on the point spread function (PSF) of the imaging system for multiple PSFs with different point light source depths, and storing multiple decoded images in memory; evaluation value calculation process applying an evaluation function to each partial image region of the multiple decoded images and storing multiple evaluation values ​​in memory; and calculation using memory based on the multiple evaluation values ​​to determine the depth estimate of the subject portion corresponding to each partial image region of the captured image. When the processor performs the decoding image generation process and the evaluation value calculation process, it first performs processing for a first group of point spread functions, then performs processing for a second group of point spread functions, and determines the final depth estimate for each subject portion based on the results of these executions.

Systems and methods for improving the quality of ultrasound images made up of a combination of multiple sub-images include giving more weight to sub-image information that is more likely to improve a combined image quality. Weighting factor information may be determined from the geometry (e.g., angle or path length) of a location of one or more specific transducer elements relative to a specific point within a region of interest or a region of an image. In some embodiments, any given pixel (or other discrete region of an image) may be formed by combining received echo data in a manner that gives more weight to data that is likely to improve image quality, and / or discounting or ignoring data that is likely to detract from image quality (e.g., by introducing noise or by increasing point spread).

The application discloses a kind of computational photography method and device, it is related to the field of computational imaging and image processing, in low-illumination environment, realize low cost, high-quality imaging.The scheme includes: before image sensor, configure chopping module, when first area non-equal interval period of chopping module rotation carries out light transmission or light shielding;During imaging, control the rotation of chopping module, so that the starting time of first area is synchronized with the frame exposure of image sensor;After first area leaves image sensor, obtain the first image output by image sensor;Based on the encoding sequence corresponding to first area, determine the point spread vector of each pixel in the to-be-recovered area of first image;Based on the point spread vector of each pixel in the to-be-recovered area of first image, the to-be-recovered area of first image is decoded to obtain clear second image.The described computational photography method and device can be used to high-quality snapshot in low-illumination scene for high-speed moving object.

For example, a radar simulator may be configured to determine simulated radar information corresponding to a simulated scene for a simulated radar system, for example, by processing simulated scene information corresponding to the simulated scene, for example, based on a path loss model and one or more point spread functions (PSFs). For example, the path loss model may represent path loss of radar signals transmitted by one or more transmitters of the simulated radar system and received by one or more receivers of the simulated radar system. For example, the one or more PSFs may correspond to one or more radar processing methods applied by the simulated radar system. For example, the radar simulator may be configured to provide an output based on the simulated radar information.

The present invention relates to a tolerance analysis method for a computational imaging system based on restored image performance, comprising: constructing a universal optical element machining error model; determining the parameter boundaries of the error model based on a given root mean square value of the machining surface shape error, generating machining error parameters, and importing them into optical design software for ray tracing. The system obtains wave aberrations of each field of view to obtain point spread functions of each field of view, superimposes a noise image to obtain a degraded image, thereby constructing a restored image, and evaluating the MTF values ​​of each field of view of the system, using the machining tolerance limits of each optical element; multiplying the machining tolerance limits of each optical element by a proportionality coefficient Ra, and repeatedly executing the above steps, gradually increasing the proportionality coefficient until the machining error boundaries of each optical element in the system are obtained. Compared with the prior art, the present invention can implement tolerance analysis of computational imaging systems and determine the machining tolerance boundaries of optical elements, which has important guiding significance for the machining of optical elements in the system.

The utility model discloses a point diffusion out-of-focus multi-effect lens, and relates to the technical field of vision prevention and control lenses. The point diffusion out-of-focus multi-effect lens is provided with the central optical area, the out-of-focus area and the light diffusion area, the out-of-focus area is located on the periphery of the central optical area, the light diffusion area comprises the diffusion point array to change light scattering so as to adjust the contrast ratio, the point diffusion area is matched with the out-of-focus area, and the vision delay effect is better; meanwhile, a plurality of out-of-focus rings are arranged to construct a plurality of out-of-focus areas, a microstructure array of the out-of-focus areas is arranged in a radial array mode, a structure with dense middle out-of-focus structures and sparse out-of-focus structures is formed, the physiological structure of human eyes is met, vision impediment is reduced, and the astigmatism problem of a wearer is solved; moreover, the out-of-focus zones in the adjacent out-of-focus annular zones are staggered in the circumferential direction, and the intervals between the out-of-focus zones in the adjacent out-of-focus annular zones are also staggered in the circumferential direction, so that the anisotropy of the out-of-focus zones is increased, the adaptation of a visual receptor is reduced, and the tolerance phenomenon is delayed.

This invention relates to the field of optical element technology, and discloses a scattering and homogenizing element, a design method, and a point diffuser lens. The scattering and homogenizing element includes a microlens array, which includes several sub-lenses. The aperture boundaries of the sub-lenses are made of Thiessen polygons, and the seed point coordinates of the Thiessen polygons are randomly distributed. The geometric center point of any Thiessen polygon is the vertex position of the corresponding sub-lens. This invention can effectively suppress interference speckle caused by regular arrays, improve the uniformity of the light field, and has a better homogenizing effect in terms of irradiance distribution and intensity.

The invention discloses a brightness compensation method, a head-up display, a storage medium and a program product, and relates to the technical field of head-up displayers, and the brightness compensation method is applied to the head-up display, and comprises the steps: carrying out the edge detection of a target image after a projection instruction of the target image is detected, obtaining pixel positions and target brightness of edge pixels in the target image; according to the pixel position of the edge pixel and a preset point spread function list, determining the pixel position of a diffusion pixel corresponding to the edge pixel, target brightness and a point spread function; according to the pixel position of the diffusion pixel, the target brightness, the point diffusion function and the pixel position of the edge pixel, the diffusion brightness of the edge pixel is calculated; and performing edge brightness compensation on the target image based on the target brightness and the diffusion brightness of the edge pixel to obtain a to-be-projected image corresponding to the target image, and performing projection display on the to-be-projected image. The projection image definition of the head-up display can be improved.

The invention discloses a light-digital collaborative optimization zoom imaging system design method, and belongs to the technical field of computational imaging, a four-piece zoom structure is adopted as an initial optical system, Zemax is utilized to simulate and output a blurred image and a spatial variable point spread function (PSF), and an end-to-end joint optimization platform is constructed through VS Code and Matlab; the digital processing part is used for segmenting the image and the PSF into n * n blocks based on a blocking strategy, carrying out non-blind deblurring processing by adopting a Lucy-Richardson algorithm in combination with a boundary expansion and gradient fusion technology, and optimizing the brightness through a dichotomy; and finally, feeding back the mean square error of the restored image and the original image to Zemax as an evaluation function, and driving the optimization of the optical system. According to the invention, while the complexity of the system is maintained, the restoration effect of short-focus and other scenes is remarkably improved, and the imaging quality is superior to that of a traditional independent design mode.

The invention belongs to the technical field of seismic exploration, and particularly relates to a passive source missing trace record robust multi-dimensional deconvolution reconstruction method based on double-domain step-by-step interpolation, which is used for relieving the influence of non-uniform seismic source distribution and improving the precision of a virtual gun reconstruction record through a process of regularizing a point spread function and a related function. The method comprises the following steps of: performing linear feature interpolation and Curvelet transformation interpolation step by step by utilizing linear features of a point spread function and curve features of a related function in a common shot point domain to finish regularization of a part of point spread function and related function data; and repeating the step-by-step interpolation operation in a common detection point domain to complete regularization of all point spread functions and related function data. According to the double-domain step-by-step interpolation method, data characteristics of a point spread function and a correlation function in a multi-dimensional deconvolution process are combined, so that multi-dimensional deconvolution reconstruction becomes more stable, and the precision of a reconstructed virtual shot record is higher.

The invention discloses a difference-based image restoration method and system, a storage medium and a terminal, and the method comprises the steps: carrying out the imaging of a to-be-detected target, obtaining optical system aberrations at different moments through a wavefront detector, and obtaining detection images at different moments through an imaging detector; based on the aberration theory, generating a point spread function (PSF) according to the aberration of the optical system; obtaining point diffusion systems PSF1 and PSF2 corresponding to the target at two different moments and detection images O1 and O2 of corresponding imaging detectors; based on a differential method, performing data processing on the obtained PSF1 and PSF2 and the detection images O1 and O2 to obtain # imgabs0 # and a differential detection image # imgabs1 #, and performing image restoration processing to obtain a restored clear image corresponding to the target; according to the invention, image restoration under the conditions of large aberration and severe noise is realized, and the quality and efficiency of image restoration are improved.

The invention relates to a single viewpoint imaging system for optically sectioning an object from a single viewpoint, comprising: (a) a TPNDBs (tilted pseudo-nondiffracting beams)-type coded phase mask (CPM) configured to receive a light beam passed through the object or reflected therefrom, and to produce TPNDBs directed towards a sensing array; (b) said sensing array configured to record an image formed by said TPNDBs impinged thereon; (c) a processor configured to: (c1) separately cross-correlating said recorded image with at least one point-spread function (PSF) previously acquired or calculated at the same system with the same CPM, each said PSF reflects a point object positioned at one specific longitudinal distance, respectively, from said array; (c2) storing the results of said separate cross-correlations, each such cross-correlation result relates to an image of another section, respectively, of the object; and (c3) uniting all said cross-correlation results to reconstruct a final image of the object.

The application discloses a visible light imaging method and device, and belongs to the field of optical imaging. The method is used for a visible light imaging lens, and the visible light imaging lens comprises a first lens and a second lens at a near image end. The method comprises the following steps: acquiring an initial imaging image output by the second lens; performing regional division on the initial imaging image to obtain a plurality of initial sub-images; for different initial sub-images and different imaging wavelengths of each initial sub-image, a restored sub-image is obtained by restoration according to different point spread functions respectively; and all the restored sub-images are spliced to obtain a restored imaging image. The imaging field of view is divided into a plurality of sub-fields of view, which correspond to each sub-image one by one, and different point spread functions are determined according to different imaging wavelengths under different sub-fields of view. The method does not need to increase optical components and optical materials for correcting aberration, can reduce the number, volume, weight and cost of optical system lenses, and improves the portability of the lens assembly.

The invention discloses a coding aperture correlation holographic imaging method based on a single exposure point extended hologram, and relates to the field of computational optical imaging. According to the method, a conventional coding phase mask and a secondary phase are respectively modulated by using opposite linear phases to obtain an intensity image for simultaneously recording an object and an object hologram, then the intensity image is segmented to obtain the object and the object hologram, and finally the object and the object hologram are subjected to deconvolution to obtain a point expansion hologram for reconstruction. According to the method provided by the invention, the point expansion hologram can be obtained through single exposure, and the reconstruction quality of the interference-free coded aperture-related holography can be remarkably improved.