17results about How to "Correct distortion" patented technology

The invention belongs to the field of image processing, and particularly discloses an imaging simulation method and device based on a point spread function and electronic equipment, and the method comprises the steps: building a light source model corresponding to an image shot by an optical system, and obtaining the point spread function of a point light source of the light source model after the action of the optical system; obtaining error point spread functions under different optical system models; performing weighted averaging on each error point spread function according to a preset weight to obtain a comprehensive point spread function; forming an array diagram by the comprehensive point spread function according to light distribution, and carrying out convolution on the array diagram and a shot image to obtain a degraded image simulating a blurring effect caused by aberration; and applying the distortion model of the optical system to the shot image to obtain a distortion-simulated deformation effect image, and realizing imaging simulation of the optical system based on the deformation effect image and the degraded image. According to the invention, the imaging accuracy and efficiency can be improved.

The invention discloses an optical lens, a camera module and terminal equipment, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. A fifth lens element with refractive power; the sixth lens has refractive power, the seventh lens has positive refractive power, and the object side surface of the seventh lens is a convex surface; the optical lens satisfies the following relational expressions: FOV is greater than or equal to 140deg and less than or equal to 151deg, 6.4 lt; tTL / IMGHlt; 7 and 1lt; sAGs1 / CT1lt; and 1.25. According to the optical lens, the camera module and the terminal equipment, high-pixel imaging can be taken into account while the miniaturization design of the optical lens is met.

The invention discloses a confocal microscopic image distortion correction method based on a two-axis MEMS (Micro Electro Mechanical System) scanning galvanometer. The method comprises the following steps: acquiring an original image by using a confocal microscope of a two-axis MEMS scanning galvanometer; calculating to obtain a galvanometer normal vector; calculating to obtain an incident light unit vector; calculating to obtain a reflected light unit vector; according to the method, distortion introduced by the MEMS galvanometer can be removed, distortion introduced by the MEMS galvanometer can be corrected under the condition that the posture of the scanned end face is unknown, and then a distortionless confocal image is obtained.

The invention relates to the technical field of computer vision, and provides a text image matching method and system based on large language model entropy increase, and the method comprises the steps: enabling data set image features to pass through a visual attention encoder to obtain original image codes; constructing a hypergraph based on original image coding and generating hypergraph image features through a hypergraph neural network; performing residual connection on the hypergraph image features and original image codes to construct a visual hypergraph adapter; inducing a large language model to generate a synonym material through a prompt learning method by utilizing a first text feature generated by the image feature description, and obtaining an entropy-increased fusion text feature; encoding the fused text feature and the first text feature; constructing a hypergraph based on multi-dimensional feature coding, and generating hypergraph text features through a hypergraph neural network; performing dimension reduction on the supergraph text features, and then combining with original corpus feature codes to construct a text supergraph adapter; and calculating a similarity matrix based on the visual hypergraph adapters and the text hypergraph adapters to obtain a similarity ranking.

The invention discloses an optical lens, a camera module and a terminal device, the optical lens comprises seven lenses, the first lens has negative refractive power, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface near an optical axis respectively; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface in paraxial regions, respectively. The third lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The fourth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region thereof. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element with negative refractive power has an object-side surface and an image-side surface being concave in a paraxial region. The seventh lens element with positive refractive power has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The optical lens satisfies the following relational expressions: FOV is greater than or equal to 130 degrees and less than or equal to 160 degrees, and R6 / F3 is greater than or equal to-7.5 and less than or equal to-3.0.

The invention discloses an optical lens, a camera module and a terminal device, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, and the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface near an optical axis; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface in a paraxial region, respectively. The third lens element with positive refractive power has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The fourth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element with negative refractive power has an object-side surface and an image-side surface being concave and convex in a paraxial region thereof. The seventh lens element with positive refractive power has an object-side surface and an image-side surface being convex and concave in a paraxial region thereof. The optical lens satisfies the following relational expressions: 150 deg < = FOV < = 160 deg and 1.4 < = FNO < = 1.55.

The invention discloses an optical lens, an image capturing module and a terminal device, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with positive refractive power has a convex object-side surface and a concave image-side surface, respectively. The fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The fifth lens element with refractive power has a convex object-side surface and a convex image-side surface. The sixth lens has negative refractive power, the object side surface and the image side surface are both concave surfaces, the seventh lens has positive refractive power, and the object side surface and the image side surface are respectively a convex surface and a concave surface; the optical lens satisfies the following relational expressions: FOV is greater than or equal to 130 deg and less than or equal to 140 deg, and TTL / IMGH is greater than or equal to 7.1 and less than or equal to 7.9. According to the optical lens, the image capturing module and the terminal equipment, the miniaturization design of the optical lens can be met, meanwhile, the large field angle can be achieved, and meanwhile the imaging quality can be improved.

The invention relates to the technical field of optical imaging systems, and discloses a small long-focus projection imaging system which comprises a light valve, a prism, an image bias lens and a projection lens. The projection lens is sequentially provided with a rear lens group and a front lens group on the same optical axis from light incidence to light emergence, the rear lens group comprises a first lens with positive focal power which is a glass aspheric lens, a second lens with positive focal power which is a glass spherical lens, a third lens with negative focal power which is a glass spherical lens, and a fourth lens with negative focal power which is a glass spherical lens. The front lens group comprises a fourth lens which has positive focal power and is a glass spherical lens, and a fifth lens which has negative focal power and is a plastic aspheric lens; a diaphragm is arranged between the front lens group and the rear lens group; the second lens and the third lens are combined into a doublet lens; the aspheric lens is adopted to optimize the exit pupil position of the lens and correct distortion and astigmatism, meanwhile, a compact structure is adopted, the manufacturing cost of the lens is reduced, and the size of the lens is successfully reduced.

The invention discloses a single-molecule fluorescence spectrum imaging device and a calibration method thereof, the imaging device comprises a diaphragm, a first lens, a first reflector module, a dispersion prism, a second reflector module, a second lens and a camera, the first reflector module and the second reflector module can be moved in or out of a light path at the same time; if the first reflector module and the second reflector module move into the light path at the same time, incident light sequentially passes through the diaphragm, the first lens, the first reflector module, the dispersion prism, the second reflector module and the second lens and then is imaged in the camera; if the first reflector module and the second reflector module move out of the light path at the same time, the incident light sequentially passes through the diaphragm, the first lens and the second lens and then is imaged in the camera. The embodiment of the invention can improve the measurement precision and reduce the cost in the full view field range, and can be widely applied to the technical field of detection.

The present application relates to a kind of wind tunnel test complex building surface pressure measuring pipe signal distortion correction method, it is related to wind tunnel test data processing field.This method includes the following steps: S1, building model is prepared, region is divided, and measurement point is set;S2, the pressure measuring tube diameter at measurement point of wind tunnel test is determined;S3, wind tunnel test is carried out, and the result is handled to obtain wind pressure time history;S4, wind pressure time history is filtered;S5, to the distorted pressure measuring pipe signal is corrected, and the real signal time history is obtained.This method can be more accurate by twice filtering, the pipe distortion problem that appears in pressure measurement time is corrected, it is suitable for the region of complex building deformation larger.And this method can effectively improve the accuracy of wind tunnel test measured data, better help production and scientific research work development.The existing method only considers the characteristics of pressure measuring tube, and the correction method is simple, and the problem of easy to produce error correction result is solved.

The embodiment of the invention relates to the technical field of optics, and discloses a camera shooting optical lens which comprises six lenses which are sequentially a first lens with negative refraction power, a second lens with positive refraction power, a third lens with positive refraction power and a fourth lens with negative refraction power from an object side to an image side, a fifth lens element with positive refractive power; and a sixth lens element with negative refractive power. Through the configuration mode of the lenses, the shooting optical lens has the advantages of being large in aperture, wide in angle, ultrathin and good in optical performance, the total optical length of the shooting optical lens can be controlled, the focal length of the lens is reasonably distributed, the deflection degree of light passing through the lens is relieved, astigmatism and distortion are effectively corrected, chromatic aberration is corrected, aberration is reduced, and the imaging effect is improved.

The invention belongs to the technical field of robot wheel hub grinding, and particularly relates to a visual imaging correction method for a wheel hub grinding system, which comprises the steps of equipment fixing, image acquisition, wheel hub model identification, image correction, preliminary grinding and grinding correction. According to the visual imaging correction method for the hub grinding system, eyes are installed on a hub grinding robot, and a traditional burr grinding system is helped to achieve automatic grinding operation; a laser line scanning camera with higher ambient light interference resistance is adopted to collect images of the surface of a hub and the edge of a rib window, distortion of three-dimensional point cloud information of the hub is corrected, a semi-transparent mirror is arranged between a light source and the laser line scanning camera, and light is moved to the same direction as the axis of the laser line scanning camera; a mode of firstly remapping a two-dimensional image and then performing point cloud reconstruction is adopted, the correction image is changed from complex algorithm calculation to remapping of a pixel position, and the calculation efficiency is improved.

The embodiment of the invention discloses an ultraviolet ultrafast laser telecentric lens group and laser processing equipment, the ultraviolet ultrafast laser telecentric lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along the incident direction of light, the first lens is a biconvex positive lens, the second lens is a biconcave negative lens, and the fifth lens is a biconvex negative lens. The third lens is a negative meniscus lens, the fourth lens is a positive meniscus lens, and the fifth lens is a biconvex positive lens. According to the ultraviolet ultrafast laser telecentric lens group, an exit pupil is located at the infinite position of an image space, main light rays of a focused light beam are perpendicular to a focal plane under the condition of any full field angle, perforation inclination is avoided, astigmatism and distortion of the laser telecentric lens group are effectively corrected, an image space telecentric light path is achieved, and the imaging quality is improved. In addition, the lens is simple in structure and convenient to design, and can be widely applied to various fine laser processing devices.

The invention discloses an optical image lens system group, which comprises six lens elements, namely a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, which are sequentially arranged from an object side to an image side along an optical path. Each of the six lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has positive refractive power. The fourth lens element has positive refractive power. The fourth lens element has an image-side surface being convex in a paraxial region thereof. The fifth lens element has an image-side surface being concave in a paraxial region thereof. The sixth lens element has negative refractive power. The sixth lens element has an object-side surface being convex in a paraxial region thereof. When specific conditions are met, the optical image lens system group can meet the requirements of miniaturization and high imaging quality at the same time. The invention further discloses an image capturing device with the optical image lens system and an electronic device with the image capturing device.

The invention provides an MOPA laser system capable of improving output efficiency, light field distribution and light beam quality, the MOPA laser system comprises a nanosecond laser oscillator, an isolator, a concave lens and a two-way amplifier which are connected in sequence, the centers of the nanosecond laser oscillator, the isolator and the concave lens are arranged on the same straight line, and the concave lens is matched with the two-way amplifier; low-energy nanosecond pulse laser generated by the nanosecond laser oscillator enters the isolator, then the size of laser spots is adjusted through the concave lens, then the low-energy nanosecond pulse laser enters the two-way amplifier from one end of the two-way amplifier to be amplified, the low-energy nanosecond pulse laser is reflected at the other end of the two-way amplifier to be amplified again, and then the low-energy nanosecond pulse laser is output from one end of the two-way amplifier. The light beam quality of amplified light is remarkably improved through the two-way amplifier, deterioration of the light beam quality is avoided, upper energy level particles of the gain medium are fully extracted, and therefore the amplification efficiency of the first-stage amplifier is greatly improved. According to the invention, the light beam quality of the amplified light is effectively improved, and the light field distortion is optimized, so that the high-quality amplified light output is obtained.

The utility model discloses an evaporator fin pressing device, which belongs to the technical field of evaporator production and comprises a support frame used for supporting evaporator fins, a fixing plate is mounted at the top of the support frame, four fixing rods used for supporting and guiding are welded at the top of the fixing plate, a mounting plate is mounted at the tops of the fixing rods, and the mounting plate is mounted on the support frame. A power box and a telescopic rod are mounted at the top of the mounting plate, a movable part of the telescopic rod is connected with a connecting disc, a pressing plate is welded to the bottom of the connecting disc, a cross-shaped groove for guiding is formed in the pressing plate, a cross-shaped moving plate is slidably mounted in the cross-shaped groove, a connecting column is connected to one side of the cross-shaped moving plate, and the connecting column is connected to the other side of the cross-shaped moving plate. According to the evaporator fin pressing device, the pre-pressing capacity can be improved, distortion or deviation generated in the production and transportation process of fins can be effectively corrected, the pressing uniformity and stability are improved, the production efficiency is improved, and the cost is reduced.

The application discloses a kind of industrial data transaction processing method, system and storage medium supporting privacy protection, belong to big data processing and privacy computing technical field.The application is aimed at the problems of value evaluation distortion, blind state quality quantization difficulty and side channel attack risk etc existing in complete equipment data transaction with strong physical coupling relationship in industrial internet of things, first, the global ciphertext topology graph is constructed by double-mode physical coupling attenuation model, and the mechanical transmission or space flow field coupling between devices is quantified as a secret state adjacency matrix.Second, the edge node performs normalized entropy value calculation on high-frequency sensing signal, and the blind state quality is identified and innately authorized by smart contract.Then, the spatial centrality and gradient cosine similarity are calculated in graph federation iteration, and the exogenous contribution weight is accumulated.Finally, the data value is comprehensively evaluated by a nonlinear coupling formula, the counterparty share is determined, and the clearing rights and interests are finally issued asynchronously by the confused network with secret state credentials.