9results about How to "Correct distortion" patented technology

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, 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 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 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 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.