43results about How to "Fix out of focus" patented technology

The invention discloses a face angle and face ambiguity analysis method and system, and computer equipment. The method comprises the steps of S1, neural network model training, S2, to-be-detected image extraction, S3, image face detection and correction, S4, face angle and ambiguity prediction, and S5, attribute output. Through a first neural network model based on deep learning, a face frame andface feature points in a picture can be rapidly detected, and a face frame position and a face feature point position are output; after correcting and amplifying the face frame, a corrected and standardized face image is intercepted; face angle and face ambiguity analysis are carried out based on the head picture on the captured corrected and standardized face picture through a second neural network model. The confidence coefficient of output face angle classification and the regression value of the face ambiguity are obtained and predicted, the problems of defocusing and motion ambiguity aresolved, high-quality pictures can be extracted, various data analysis, comparison and other operations can be carried out on the basis of the high-quality pictures, and the accuracy of subsequent analysis and prediction is improved.

The invention relates to a device and a method for preparing a nano imaged substrate. According to the preparation method, by means of the insensitivity of laser interference exposure to warping of the substrate, the defocus problem brought to a conventional imaging technology due to the warping characteristic of a sapphire substrate is solved. In the preparation device, an optical system which can modulate phase and space optical field information is designed, so that a laser interference exposure system can control sizes of interference light spots and inside dot matrix distribution, and industrial application possibility is brought to the nano imaging process of the substrate.

The invention discloses a method for preparing a multi-level structural microarray by a laser direct-writing technology, and belongs to the field of laser micromachining. In an array preparation process, a plane geometry structure is determined by plane figures input into a computer; the resolution depends on the multiple of a microfilm lens in a light path and the precision of a nanomotor and can reach 0.3 mu m; and based on the relationship between exposure depth and exposure time and the relationship between development depth and development time obtained by an experiment, the depth of a machining size is controlled by the regulation and the control of the exposure time and the development time. The method does not need a mask or a photolithography model, greatly reduces the preparation cost of arrays, has the feasibility of preparing a multi-level structure and high efficiency, and is suitable for the popularization of industrial production.

The invention discloses a three-dimensional laser cutting machine. The three-dimensional laser cutting machine comprises a machine tool, wherein the machine tool comprises an X-axis assembly used for driving a cutting head in an X direction, a Z-axis assembly used for driving the cutting head in a Z direction, a Y-axis assembly used for driving a workpiece in a Y direction, a workpiece rotary shaft assembly used for driving the workpiece to rotate, a cutting head rotary shaft assembly and a follower shaft assembly; the workpiece rotary shaft assembly is capable of driving the workpiece to rotate in the Z direction; the cutting head rotary shaft assembly is capable of driving the cutting head to rotate in the Y direction; the follower shaft assembly is arranged on the cutting head rotary shaft assembly; the cutting head is arranged in the follower shaft assembly; a capacitive sensor is arranged at the nozzle of the cutting head; and each two of the X direction, the Y direction and the Z direction are mutually vertical. The three-dimensional laser cutting machine further comprises a control terminal used for carrying out control operation on the machine tool. The follower shaft assembly is capable of automatically adjusting the height of the cutting head according to the change of the surface of a cutting sample to ensure a constant distance between the cutting head and the cutting sample during a three-dimensional laser cutting process, thereby solving the out-of-focus problem generated during a cutting process.

The invention relates to a day-and-night dual-purpose lens system free of day-and-night confocal design and an implementation method thereof. The day-and-night dual-purpose lens system comprises a lens, a chip and a light filter switcher, wherein the light filter switcher is arranged inside the lens or is arranged at the front end of the lens or is arranged between the lens and the chip; a light filter I and a light filter II used for days and nights respectively are arranged on the light filter switcher; the light filter I and the light filter II are vertical to an optical axis and can be switched to the position of the optical axis for filtering light with different wave bands respectively; the light filter I is an infrared light cut-off filter capable of filtering infrared light; and the light filter II is a visible light cut-off filter capable of filtering visible light. The system and the method do not need to take a complicated day-and-night confocal design of the lens into account, a day-and-night confocal effect can be realized through a simple structure or method, and the system is low in manufacturing cost and excellent in performance.

The invention discloses a method for focusing a camera image in a digital slice scanner. The method comprises the following steps: 1, obtaining a navigation preview image of a slice and identifying and obtaining a scanning area; 2, dividing all scanning visual fields in the scanning area; 3, selecting a focussed visual field and a coarse focusing visual field; 4, focusing the coarse focusing visual field; 5, expanding the field focus of the coarse focusing field into the focusing field; 6, finely focusing the focusing visual field; 7, setting focus values of all visual field according to the distances from the visual fields to the focused visual field. The method has high stepping focusing speed, an image focus can be accurately found, the method is used for a full-automatic digital pathological scanner, and the problem of image defocusing in an existing camera image focusing technology is solved.

The invention belongs to the technical field of optical remote sensing imaging, and relates to a spherical focal plane-based sub viewing field step gaze imaging optical system. The system aims to solve the problem of defocusing produced by sub viewing field step directing in a converging light path. A unique spherical focal plane form is adopted in the main optical system, a planar directing mirror is arranged in the converging light path, and the distance between the directing mirror and a main optical focal plane is accordant with the curvature radius of the spherical focal plane so as to avoid the problem of defocusing produced due to the motion of the directing mirror in the converging light path; and different sub viewing fields in a full viewing field are introduced into a subsequent imaging light path one by one by two-dimensional step directing of the directing mirror, the imaging light path is divided into different channels by a light splitting assembly, and a correction lens set of each imaging channel finishes focal length control and field curvature equal aberration correction to match the scale of a detection device in each channel and realize a flat image field required by the detection device. The system breaks through the technical bottleneck that the scale of a surface array detector in large surface array gaze imaging application is limited, and realizes scanning coverage of the full viewing field by using a small surface array detector.

The invention discloses an automatic pose adjustment method and device for a spherical optical element with a large curvature radius. According to the automatic posture adjustment method and device, ahigh-power microscope is utilized to collect a plurality of continuous dark-field gray-scale images focused to defocused correspondingly along four edge characteristic points with vertical and horizontal orthogonal diameters on the surface of the spherical optical element with the large curvature radius, an image Tenengrad operator value is calculated, the Tenengrad operator value and a high-power microscope axial movement curve are fitted, a positive focus position is searched according to an image Tenengrad operator extreme value criterion, and the spatial coordinates of each characteristicpoint are obtained; and by establishing a spatial mathematical model of the feature points and an adjusting device, the spatial coordinates of the four feature points are converted into pitch and spin two-dimensional adjustment amount to perform pose adjustment operations. The automatic posture adjustment method and device solve the defocusing problem caused by the non-parallel optical axis of the optical element and the optical axis of the microscope and the change of the rise height of the spherical optical element beyond the depth of field range of the microscope in the microscope full-aperture scanning detection process of the spherical optical element with large curvature radius.

The invention relates to the technical field of LED display, and particularly discloses an LED screen correction image acquisition method, correction method, acquisition device and correction system. The acquisition method comprises the steps: calculating the target acquisition width and height range of a camera; generating a plurality of lamp point lightening schemes according to the lamp point spacing of the LED display screen, the target acquisition width and height range and a preset lamp point spacing strategy; generating corresponding display control information and shooting control information according to each lamp point lightening scheme; and obtaining correction images shot by the camera under the different shooting control information on the LED display screen under the different display control information, and the like. On the basis of meeting the data precision requirement, the correction images as few as possible are obtained, the image acquisition efficiency is improved, the CMOS pixels can be fully paved by the obtained correction images as much as possible, the problems of peripheral defocus, distortion and the like of the correction images in the prior art are solved, and the subsequent correction effect on the LED display screen is ensured.

The invention discloses a micro-impulse torsion device for differential measurement of laser interferometry, which solves the problems of low precision of torsion, defocus, and translation caused by impact force loading. Including the torsion part and the laser interference part; the torsion part includes a vertical frame, an upper cross bar and a lower cross bar, an oblique beam, a lifting adjustment mechanism and a translation adjustment mechanism; between the upper cross bar and the lower cross bar of the shaped frame The pendulum wire is suspended between the wires, and the middle part of the wire is fixed with a pendulum beam perpendicular to the wire. The vertical rod is fixed on the upper end of the inclined beam through the lifting adjustment mechanism. The lower end of the inclined beam is installed on the translation adjustment mechanism, and the translation adjustment mechanism is fixed on the test bench. ; The laser interference part includes beam expanders, reflectors, beam splitters, He-Ne lasers for generating interference beams, photodetectors and signal processing terminals. The measuring range of the device system of the invention is reasonable, the measurement accuracy is higher, the measurement process period is short, and the high-precision laser micro-pulse measurement is realized.

The invention provides an arrangement method of exposure areas on a wafer. The arrangement method of exposure areas on a wafer comprises the following steps of: providing exposure area information andphotoetching machine exposure information influencing the arrangement of the exposure area; setting an exposure area rule according to the exposure area information and the photoetching machine exposure information to maximize effective Die; and calculating and obtaining the optimal grid shift and the value of the non-focusing area of the wafer edge by using the exposure area information, the photoetching machine exposure information and the exposure area rule so that the effective Die of the wafer edge is covered. According to the method for intelligently setting the arrangement of the exposure areas on the wafer, three conditions of the size of laser marks, the maximization of effective die and the arrangement of flatness sensors can be comprehensively considered, the optimal arrangement of the exposure areas can be calculated in advance, the problem of defocusing of the edge of the wafer is avoided in advance while the maximization of the effective die is ensured, and the method issuitable for the development trend of advanced technology node photoetching.

The swing type laser welding device comprises a hollow support, a CCD camera and a QBH optical fiber interface are arranged on the hollow support, a laser focusing assembly is arranged at the bottom of the hollow support and located under the CCD camera, and an X driving motor, a Y driving motor, a beam expander and a fixed spectroscope are arranged in the hollow support. An X galvanometer reflecting mirror is arranged on a rotating shaft of the X driving motor, a Y galvanometer reflecting mirror is arranged on a rotating shaft of the Y driving motor, the beam expanding mirror is arranged right above the X galvanometer reflecting mirror, and the fixed spectroscope is arranged right below the CCD camera. The welding device solves the problems that an existing swing type laser welding machine is prone to defocusing, and consequently welding spots are not uniform in size and energy.

The invention discloses an image fusion method and device, a storage medium and a terminal. The method comprises the steps of obtaining a first image and a second image; determining a to-be-fused region in the first image; processing the first image and the second image to obtain a processed first image and a processed second image; determining a fusion mask image of the to-be-fused region according to the high-frequency detail information of the processed first image and the high-frequency detail information of the processed second image, the fusion mask image being used for indicating a fusion weight of the processed second image; and performing image fusion according to the determined fusion mask image, the processed first image and the processed second image to obtain a fused image. According to the scheme, the robustness of image fusion can be enhanced.

The invention relates to a working distance-variable self-focusing OCT endoscope. The endoscope comprises a shell, an OCT endoscope lens cavity and a micro motor, wherein the OCT endoscope lens cavityand the micro motor are arranged in the shell; an optical device is arranged in the OCT endoscope lens cavity and is used for outputting focused laser beams to penetrate the shell to irradiate a sample tissue, receiving reflected light of the sample tissue at the same time and outputting an signal; and the micro motor is connected with the inner wall of the shell and the OCT endoscope lens cavitythrough a lead screw sliding block to adjust the posture of the OCT endoscope lens cavity. By utilizing near-infrared laser signals emitted and received through optical coherence tomography as a basis for regulating a working distance of the endoscope, working distance-variable self-focusing optical coherence tomography imaging is realized, and an out-of-focus phenomenon and an image distortion phenomenon which are caused due to uneven surfaces of biological tissues and non-uniform surfaces of intestinal tissues are solved.

A light field polarization imaging detection system for sea surface oil spill belongs to the technical field of photoelectronic imaging, and aims to solve a problem that the prior art is not suitable for real-time detection of sea surface dynamic scenes. The system is composed of a light field polarization information acquisition subsystem and an information processing subsystem; the light field polarization information acquisition subsystem comprises an optical filter, a front optical imaging main lens group, a micro-lens array and a micro-polaroid array imaging detector, and the optical filter, the front optical imaging main lens group, the micro-lens array and the micro-polaroid array imaging detector are coaxially arranged; the micro-lens array is located at the focal plane position of the front optical imaging main lens group, and the micro-polaroid array imaging unit is located at the focal plane position of the micro-lens array; the digital focusing function of the light field camera is utilized to realize snapshot imaging of sea surface oil spill on an airborne high-speed platform, and real-time high-precision acquisition of an oil spill image is realized; and polarization imaging can improve the contrast of oil spill images and improve the ability to distinguish different oil types.

The invention belongs to the technical field of microscopic observation and discloses a real-time focusing and centering adjustment method and device for an in-situ test platform. According to the method and device, an automatic focusing algorithm and an automatic tracking algorithm are applied to the combination of a common optical microscope and an in-situ technology, automatic focusing in the in-situ test process is realized through an automatic focusing algorithm unit in a host, and automatic tracking of the region of interest is realized through a tracking algorithm unit in the host; problems of defocusing of a tested sample and deviation of an observation area in the in-situ test of the optical microscope can be well solved.

The invention provides a wing-shaped optical fiber core adjustment structure. The structure comprises main body assemblies, a cam adjustment assembly, and a pressing hammer assembly, wherein a lens, acore adjustment V-shaped groove and a discharge electrode of each main body assembly participate in optical fiber core adjustment as a whole; and during operation, optical fiber imaging distances anddistances between optical fibers and the electrodes remain unchanged, and core adjustment pivots and force output points can be flexibly arranged. The wing-shaped optical fiber core adjustment structure provided by the invention has the advantages that the space occupation ratio of the core adjustment structure is reduced, so that a basic platform can be provided for the installation of other function control modules for special optical fiber splicing, fiber Bragg grating sensor manufacturing, optical fiber tapering, end cap splicing, vertical imaging of end surfaces of spliced optical fibers, polarization-maintaining optical fiber splicing, photonic crystal optical fiber splicing, non-electrode heating splicing, and the like; compared with the conventional design, the core adjustment structure achieves higher simplicity in structure, a higher core adjustment resolution, higher reliability, lower structure cost and lower processing requirements; and the core adjustment structure can be further applied for X / Y-axis core adjustment of the conventional optical fiber fusion splicer.

The invention relates to a longitudinal motion platform. The longitudinal motion platform is suitable for being installed in electron beam detection equipment and is characterized by comprising a platform bottom plate, a lifting mechanism, an insulating supporting table and an electrostatic chuck which are sequentially arranged from bottom to top. The lower end of the lifting mechanism is fixedly connected with the platform bottom plate, the upper end of the lifting mechanism is fixed to the insulating supporting table, and a piezoelectric ceramic assembly is arranged in the lifting mechanism, so that the lifting mechanism can generate deformation in the vertical direction to change the distance between the insulating supporting table and the platform bottom plate. The lower surface of the electrostatic chuck is fixedly connected with the insulating supporting table, and the upper surface is used for adsorbing a to-be-detected wafer. Through the lifting motion of the lifting mechanism, the working distance from the lower end of the scanning electron microscope to the to-be-detected wafer is always the optimal distance, the adjustment precision is extremely high, the problem of out-of-focus caused by the change of the distance from the to-be-detected wafer to the lower end of the scanning electron microscope can be solved in cooperation with electron beam detection equipment, the focusing time is shortened, and the detection efficiency is greatly improved.

The invention relates to a movement control method for a cursor on electronic equipment, mobile equipment and the electronic equipment. The electronic device includes: a processor; a memory; the display screen comprises a first edge, a second edge, a third edge and a fourth edge, the first edge and the second edge are parallel and parallel to the first direction, the third edge and the fourth edge are parallel and parallel to the second direction, the first direction is perpendicular to the second direction, and a cursor on the display screen moves on the display screen along with movement of the mobile device; at least two UWB base stations; when the computer program is executed by the processor, the electronic equipment executes the following steps: when the cursor moves to the third edge or the fourth edge and the intersection point of the straight line where the pointing direction of the mobile equipment is located and the plane where the display screen is located is not located between the straight line where the third edge is located and the straight line where the fourth edge is located; and the cursor does not move along with the movement of the mobile equipment. According to the method, the problem of out-of-focus of the cursor on the mobile equipment and the display screen is solved.

The invention relates to an integrated imaging unit image array generation method and system based on a tilt-shift camera. The method mainly includes sampling a three-dimensional scene and generating a unit image array. wherein the tilt-shift camera is adopted for image sampling, so that the accuracy and comprehensiveness of sample image acquisition can be remarkably improved; in the process of generating the unit image array, determining a first unit image array according to the parallax image, and determining the resolution of the first unit image array according to the system parameters; and then, after pixels of the first unit image array are determined according to the resolution, determining the spatial position of each column of pixel reconstruction light in the first unit image array according to the mapping relation; and finally, obtaining the position corresponding relation of the pixels in the sample image according to the spatial position so as to obtain a final required unit image array, so that while the sampling image edge out-of-focus problem is solved, precision of the generated unit image array is improved, and the effect of integrated imaging three-dimensional display is improved.

The invention discloses a method and application of femtosecond laser direct writing processing with a near 4π solid angle by using multi-photon excitation, which belongs to the technical field of laser processing. The main principle of the out-of-focus problem when performing direct writing with a large buried depth is to split the femtosecond laser beam and then focus it inside the material to be processed, so that the energy of multiple photons can be "sufficient" to the corresponding energy threshold of the original single-photon excitation , so as to achieve the processing purpose of material modification. At the same time, the time-domain synchronization of the sub-beams after beam splitting is adjusted, and they are finally nearly orthogonally converged at the position to be processed, so as to obtain a near-spherical focal spot with a solid angle of nearly 4π. In this way, the use of multiphoton lasers solves the out-of-focus problem of femtosecond laser direct writing at large embedding depths, and a three-dimensional embedding structure with uniform properties at different processing depths can be obtained.

The invention discloses a curved fly's-eye lens based on DMD digital lithography and a preparation method thereof.The curved fly's-eye lens is of a hemispherical structure, the hemispherical structure sequentially comprises a hemispherical curved focal plane, an elastic film and a curved micro-lens array from inside to outside, all levels of sub-eyes form the curved micro-lens array, and the curved micro-lens array comprises a spherical curved focal plane, an elastic film and a curved micro-lens array. All the levels of sub-eyes comprise a first-level sub-eye located in the center of the curved-surface micro-lens array and a plurality of circles of n-level sub-eyes arranged with the first-level sub-eye as the circle center, wherein n is an integer larger than or equal to 2. A plurality of photosensitive sensors in one-to-one correspondence with the sub-eyes are uniformly arranged on one surface, facing the elastic film, of the hemispherical curved focal plane. According to the invention, three-dimensional photoetching is carried out on the micro-lens structure through digital photoetching of the digital micro-mirror DMD, and the micro-lens array can be obtained only through one-time reverse molding. The aperture and rise of the sub-eye and the curvature radius of the curved fly-eye lens are controllable, the manufactured micro-lens is high in size and surface shape precision and good in surface uniformity, the manufacturing process is simple, and the cost is low.

The invention provides a motor out-of-step compensation method and device, and the method comprises the steps: starting an optical coupling circuit in response to an inputted motor out-of-step recovery instruction so as to obtain the target output level of the optical coupling circuit; determining estimated coordinates of a corresponding motor physical position when the target output level jumps based on the relationship between the target output level and a preset optocoupler output level; and determining the target compensation value of the motor based on the estimated coordinates of the motor physical position so as to compensate the motion step number of the motor based on the target compensation value. The problems of lens out-of-focus and blurred image imaging caused by out-of-step of the motor are solved.

The invention relates to a light-concentrating type LED dual-light lens die set. The light-concentrating type LED dual-light lens die set comprises a radiator, a light source assembly mounted on the radiator, a light barrier assembly and a lens assembly, wherein the light barrier assembly and the lens assembly are mounted at the front part of the radiator; a first circuit board of a near LED die set of the light source assembly is mounted on a first mounting surface of the radiator, and a reflecting mirror with a free-form surface is mounted at the upper part of the radiator; rays emitted by a neat LED light source are reflected to a focal spot O in the lens by the reflecting mirror to be collected, and then ejected to the lens through a light barrier so as to form a near dead line light type; a second circuit board of a distance LED die set is mounted on a second mounting surface of the radiator, and a light condenser is mounted at the front part of the radiator through a light condenser bracket; and rays emitted by the distance LED light source are totally reflected to the focal spot O in the lens through the light condenser to be collected, and then ejected to the lens so as to form a distance light type. The light-concentrating type LED dual-light lens die set disclosed by the invention is compact in structure, can improve the precision of the distance light type and the near light type, and well solves the problems that dead lines spray color light, the distance light and the near light are out of alignment in focusing, and the distance light is uneven.

The invention belongs to the technical field of optical remote sensing imaging, and relates to a spherical focal plane-based sub viewing field step gaze imaging optical system. The system aims to solve the problem of defocusing produced by sub viewing field step directing in a converging light path. A unique spherical focal plane form is adopted in the main optical system, a planar directing mirror is arranged in the converging light path, and the distance between the directing mirror and a main optical focal plane is accordant with the curvature radius of the spherical focal plane so as to avoid the problem of defocusing produced due to the motion of the directing mirror in the converging light path; and different sub viewing fields in a full viewing field are introduced into a subsequent imaging light path one by one by two-dimensional step directing of the directing mirror, the imaging light path is divided into different channels by a light splitting assembly, and a correction lens set of each imaging channel finishes focal length control and field curvature equal aberration correction to match the scale of a detection device in each channel and realize a flat image field required by the detection device. The system breaks through the technical bottleneck that the scale of a surface array detector in large surface array gaze imaging application is limited, and realizes scanning coverage of the full viewing field by using a small surface array detector.

The invention provides an ultra-wideband frequency-modulated continuous wave SAR self-focusing imaging method, which comprises the following steps of: utilizing motion parameters measured by an external sensor, and performing imaging by adopting a range migration algorithm to obtain a preliminary coarse focusing image; analyzing the characteristics of the two-dimensional error of the ultra-wideband frequency-modulated continuous wave SAR in the imaging process, and establishing an error model of a two-dimensional frequency domain; estimating and compensating a range migration error on the basis of the error model of the two-dimensional frequency domain; and estimating and compensating the azimuth phase error on the basis of the error model of the two-dimensional frequency domain. The invention provides a method for solving the two-dimensional defocusing of the ultra-wideband frequency-modulated continuous wave SAR image, and the method has the advantages that the process is simple and easy to implement; the operation complexity is low; and the dependence degree on a scene target is low.

The present invention relates to the field of LED display technology, and specifically discloses a method for collecting corrected images of LED screens, a correction method, a collection device and a correction system. The collection method includes calculating the target collection width and height range of the camera; The target collects the width and height range and the preset light point interval strategy to generate several light point lighting schemes; generates corresponding display control information and shooting control information according to each light point lighting scheme; and obtains the camera under different shooting control information Steps such as correcting images taken by LED display screens under different display control information. The invention obtains as few corrected images as possible on the basis of meeting the data accuracy requirements, improves the image acquisition efficiency, and the obtained corrected images can be covered with CMOS pixels as much as possible, which solves the problem of out-of-focus and distortion around the corrected images in the prior art Problems, to ensure the subsequent correction of the LED display.

The invention provides an execution method and equipment for shooting of a fish finder, and is applied to the technical field of detection shooting. The method comprises the following steps: transmitting a preset sonar wave based on a level center, receiving a sound wave fed back by the sonar wave, recording the orientation of the sound wave based on the level center, setting the orientation of the sound wave as a first orientation, focusing through a preset focusing mode according to the first orientation, locking the first orientation after focusing is completed, and presetting a time range for a focusing locking state. Based on the side light position of the focusing shooting main body, selecting the exposure position of the shooting main body, supplementing the covered side light position of the shooting main body, in a preset time range, previewing the focused shooting main body, shooting the shooting main body, releasing the focusing locking state, previewing the shot main body, and transmitting the shot main body data; according to the invention, by adjusting the exposure bit data of the focusing shooting main body, the problems of defocusing and backlighting of the shooting main body during side light position shooting are effectively solved.

The present application discloses a focus tracking method and related equipment, which are applied to electronic equipment including an eye tracking module and a focus tracking module. The method includes: displaying a camera preview image, the camera preview image including at least one target to be shot; The eye tracking module determines the gaze position of the user gazing at the camera preview screen; determines a focus tracking target based on the gaze position, and the at least one target to be shot includes the focus tracking target; Focus tracking on the target for focus tracking. By adopting the embodiments of the present application, the problem of out-of-focus during the imaging process can be solved, and the imaging quality can be improved.