33 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 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.

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 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 present application relates to a kind of based on the even distribution solution method of irregular area cluster of force diffusion, based on force model, the number of certain equipment given constitutes cluster, deployment in irregular area on spherical surface, require deployment position as far as possible even, give the even distribution solution method.In the solution method, it is required that irregular area is single connected, when initialization, the point of given number is randomly generated in area, let point spread to even distribution by repulsion diffusion model, when point touches the boundary of area, then slide, at the corner of area, then stationary.This method can also be extended from spherical surface to three-dimensional and above space, be applied to the solution of unstructured grid division and generation, detection, exploration, limited coverage and other problems.

The present invention discloses a method and system for measuring the multi-band spatially varying point spread function of a simple lens for computational imaging, belonging to the field of optical technology. A system for measuring the spatially varying point spread function is provided, as well as a specific method for compensating and correcting the measurement results. By measuring an appropriate number of horizontal field-of-view point spread images of a simple lens and performing operations such as interpolation and rotation on them, a full-field-of-view two-dimensional multi-band point spread function array is generated, greatly improving measurement efficiency and accuracy, and contributing to improving the quality of restored images. The method can accurately and quickly measure the point spread function of a simple lens, and can be directly used as input for simple lens deconvolution operations, as well as for evaluating the imaging quality of the lens.

The application discloses a laser triangular displacement signal deconvolution and symmetric reconstruction method and a laser displacement detection device, acquires optical point spread functions of one-dimensional linear array photoelectric detectors in a measuring range of the device at different physical positions, and constructs a space time-varying optical point spread function reference library; a one-dimensional original light intensity signal of a measured surface is collected, corresponding optical point spread functions are called from the reference library after initial positioning of a light spot, iterative deconvolution is performed on the original light intensity signal, termination iteration is determined by a normalized residual change rate and a preset maximum iteration number, and a physical sharpened light spot signal is obtained; signal variance and statistical kurtosis of a main peak local area are calculated, and a dynamic pixel window width is adaptively adjusted; an asymmetric index is calculated in the dynamic pixel window, forced symmetric reconstruction is performed when the asymmetric index is greater than a preset truncation threshold, sub-pixel centroid coordinates are extracted based on a reconstructed symmetric waveform, and an actual displacement value is calculated.

A method MT1 comprises: an original image acquisition step (step ST1) in which an original image is acquired for each focus position regarding an object; a point spread information calculation step (step ST4) regarding the original image for each focus position; a focus position determination step (step ST3) in which, on the basis of the original image for each focus position, the focus position of each pixel is determined; a focus position correction step (step ST5) in which the focus position of each pixel is corrected on the basis of the point spread information; and an all-in-focus image generation step (step ST6) in which pixels corresponding to the respective corrected focus positions of the pixels are extracted, and an all-in-focus image is generated by combining the extracted pixels.

The application discloses a non-coherent optical convolution calculation system and method for multiple convolution kernel parallel calculation; the system comprises an imaging lens, an optical convolution modulation unit, an imaging detection unit, a readout circuit and a processing unit; the optical convolution modulation unit is used for modulating incident non-coherent light field, so that the system forms a plurality of point spread function responses corresponding to target convolution kernels; the imaging detection unit is used for converting optical signals into electrical signals; the processing unit is used for differentiating different channel outputs to obtain convolution feature maps corresponding to the plurality of convolution kernels; the application maps a plurality of target convolution kernels into a plurality of point spread functions in a non-coherent imaging system, and utilizes positive kernel and negative kernel decomposition and a multi-channel parallel mechanism to realize parallel optical convolution calculation of the plurality of convolution kernels under single exposure condition; and the application can be applied to the fields of edge enhancement, feature extraction, optoelectronic hybrid convolution neural network, target recognition and intelligent visual perception.

Aspects of the subject disclosure may include, for example, generating a first set of optical signals, demultiplexing the first set of optical signals to generate demultiplexed signals, launching the demultiplexed signals into a medium, receiving from the medium a second set of optical signals, multiplexing at least a portion of the second set of optical signals to generate one or more multiplexed signals, obtaining one or more electrical signals according to one or more measurements of one or more optical fields of the one or more multiplexed signals, and generating one or more point spread functions from the one or more electrical signals. Other embodiments are disclosed.

The invention discloses a hybrid microstructure design lens combining defocusing and point diffusion functions and a manufacturing method. The problem that an existing prevention and control lens is single in function is solved. The lens comprises a front surface which is provided with a plurality of micro-lenses, and different micro-lenses form a myopia out-of-focus area; a light diffusion area is arranged on the rear surface of the light guide plate, and the light diffusion area is of a point diffusion structure formed through surface frosted treatment. The manufacturing method comprises the following steps: step 1, performing injection molding or turning processing through a precision mold to form a lens base blank; 2, forming a micro-lens array on the front surface; thirdly, precise sand blasting treatment is conducted on the specific area of the rear surface to form a point diffusion structure; the front surface defocus design and the rear surface contrast regulation and control design are innovatively and organically combined, the two mechanisms have a synergistic effect, and the myopia prevention and control effect is remarkably superior to that of a single mechanism design.

The invention discloses a super-resolution imaging method and device, a medium and equipment. The method comprises the following steps: based on a point scanning imaging system, at least adopting two point spread functions to carry out fluorescence image acquisition on the same region of interest, and obtaining fluorescence images corresponding to the point spread functions; carrying out denoising processing and deconvolution processing on the basis of each fluorescence image to obtain a super-resolution image; and determining whether the super-resolution image satisfies a predetermined imaging condition, and when determining that the predetermined imaging condition is not satisfied, performing denoising processing and deconvolution processing again based on each fluorescence image to obtain a current super-resolution image until the current super-resolution image satisfies the predetermined imaging condition, and obtaining a target super-resolution image. According to the invention, super-resolution image imaging can be rapidly carried out.

1. The name of the design product: functional lens detector. 2. The use of the design product: for the detection of ordinary lenses, multifocal lenses, point spread lenses, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention concerns a method for the provision of transfer functions in the field of light field microscopy, where a sample volume to be imaged is captured using a multitude of partial images (1 bis 12xy) from different angles of capture (Φ) and for which the respective point spread functions (PSF) for the partial images (1 through 12xy) intended for a 3D reconstruction of the sample volume are determined and assigned to the partial images (1 through 12xy).A characteristic is that the partial images (1 through 12xy) are examined for existing symmetries of the optical-technical data they are based on and any found symmetries are captured and stored together with a computation formula. The computation formula makes it possible, starting from a point spread function (PSF) and / or a processed point spread function of a first partial image (1 through 12), to generate corresponding point spread functions (PSF) and / or processed point spread functions of other partial images (2x through 12xy) that are symmetric relative to the first partial image (1 through 12), where the point spread functions (PSF) and the processed point spread functions (PSF), respectively, of the other partial images (2x through 12xy) are only generated if needed and are only stored temporarily. A processed point spread function is obtained by executing at least one mathematical operation on the relevant point spread function. In addition, or alternatively, further symmetric subsets within the transmission function of at least one partial image (1 through 12xy) can be generated based on a first subset of the transmission function of a partial image (1 through 12xy), when and if needed.