15 results about "Optical modeling" patented technology

The invention relates to the technical field of tooth modeling, and discloses a three-dimensional tooth modeling system based on computer vision, computer equipment and a readable storage medium. According to the method, mirror reflection, diffuse reflection and subsurface scattering components in an original image are separated, mirror reflection intensity is normalized in combination with a dynamic truncation algorithm, pixel saturation is eliminated, groove and nest textures are reserved, a complete point cloud is obtained based on a two-dimensional texture image and cubic spline repair, and a multi-exposure point cloud sequence is obtained through bimodal calibration. The method comprises the following steps: solving the problem of data dislocation, carrying out weight assignment and data fusion on three-dimensional points in a plurality of exposure point cloud sequences to obtain three-dimensional fusion feature data, combining layered optical modeling and photon tracking compensation deviation, fusing clinical constraints, finally dynamically adjusting parameters, feeding back and optimizing, and outputting a micron-sized precision model. The modeling defect caused by difficulty in effectively coordinating feature contribution degrees under different exposure conditions is overcome, and high-precision modeling is realized.

The invention relates to a multi-agent large model code generation method and system in the optical field, relates to the technical field of optical design, and aims to solve the technical problems that in the prior art, optical terminologies are insufficiently understood, and optical performance requirements and constraints cannot be correctly extracted. The optical field multi-agent large model code generation system comprises a demand understanding agent, an optical expert agent, an architecture design agent, a script generation module, a test and feedback module, a control scheduling module and an output module. According to the multi-agent large model code generation method and system in the optical field, the accuracy of understanding optical professional requirements is greatly improved; the capability of automatically generating optical software scripts such as Zemax is higher; multiple rounds of test feedback and control scheduling are supported, and the generation accuracy is improved; the overall development period is shortened, and the optical modeling efficiency is higher; the method is more friendly to non-professional users, and the operation threshold is reduced; and the dependence on qualified optical engineers is reduced, and the development cost is reduced.

The invention discloses a visible light communication anti-eavesdropping method based on deep reinforcement learning and an optical intelligent reflecting surface, and relates to visible light communication security. Constructing a multi-user safe visible light communication indoor model, and designing a reverse pre-reflection model based on geometrical optical modeling to drive a deep reinforcement learning agent to learn; and accumulating experience by interacting with the environment, sampling and updating the weight of the deep reinforcement learning network by a sampling experience playback pool, and guiding intelligent control on LED beam forming and an optical intelligent reflecting surface. The guide error of the optical intelligent reflecting surface in the environment is perceived by the model at each moment, the secrecy rate of a receiving user is received, the deep reinforcement learning network is combined with the strategy at the previous moment and the environment state to output the strategy at the next moment, and the experience playback pool is circularly updated. And deep reinforcement learning is driven by a reverse pre-reflection model to jointly optimize LED beam forming and optical intelligent reflecting surface guiding, and the optical intelligent reflecting surface is used for accurately controlling a reflection path in a complex dynamic environment, so that the safety communication capability and the resource allocation efficiency are improved.

The invention relates to the technical field of image processing, and discloses a facial health state assessment method and system based on layered optical modeling. The objective of the invention is to solve the problems of poor face health state evaluation precision and robustness caused by rough optical modeling, mixed reflection components, weak environmental adaptability and insufficient multi-dimensional health index fusion capability in the prior art. The method comprises the following steps: synchronously acquiring a user face video sequence comprising at least two different spectral bands through a multispectral imaging device; constructing a multilayer optical transmission model of the skin tissue, and separating a specular reflection component and a diffuse reflection component from the face video sequence; extracting a physiological time sequence signal related to subcutaneous blood flow activity from the separated diffuse reflection component, and calculating heart rate, heart rate variability and blood oxygen saturation parameters; and fusing the physiological parameters and expression and micro-expression features extracted from the facial video sequence, and outputting quantitative evaluation results of fatigue degree, pressure level and emotional state through a pre-trained deep neural network model. The system comprises a multispectral image acquisition module, a layered optical modeling module, a reflection component separation module, a physiological parameter inversion module and a health state evaluation module. According to the technical scheme, the signal-to-noise ratio and stability of physiological signal extraction in a complex illumination environment can be remarkably improved, the adaptability to individuals with different skin colors and dynamic illumination conditions is enhanced, and more accurate and more robust judgment of the high-order health state is achieved.

The application relates to the field of photoetching technology, in particular to a method and device for calculating a focus point of a photoetching light beam and a computer device, the method comprises the following steps: S0, acquiring a critical dimension of a mask pattern; S1, establishing a focus depth model according to the critical dimension and a preset optical modeling model; S2, under a preset metrology level, bringing the critical dimension into the focus depth model, and calculating a focus point offset of the critical dimension and feature information through a preset first algorithm; and S3, calculating a final focus point of the critical dimension through a preset second algorithm according to the focus point offset and the feature information. The method provided by the application considers the focus point offset and the focus depth information, and can more accurately find the focus point of the photoetching light beam.

1. Name of the product in this design: Visual monitoring radar with expansion dock. 2. Application of this design: It is used as a visualized micro-change monitoring radar for geological disasters, engineering construction and emergency rescue support, and also has extended functions such as three-dimensional optical modeling and coordinate positioning. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

An efficient computational method for cross-scale optical modeling of micro / nano-structured solar cells is presented, belonging to the field of solar cell design and simulation technology. This method decomposes a cross-scale solar cell containing a micro / nano pyramid structure into a top micro / nano structure layer and a middle and bottom multi-layer planar structure, respectively simulated using the finite element method (FEM) and transmission matrix theory (TMT): FEM accurately calculates the polarized light transmission and reflection coefficients of the top micro / nano structure, considering multi-order diffraction effects; TMT efficiently calculates the polarized light transmission characteristics of the middle and bottom multi-layer planar structure; and finally, the total absorption, reflection, and transmission spectra and photocurrent of the cell are integrated through coupled formulas. This invention solves the problem of balancing accuracy and efficiency in cross-scale structure modeling using traditional single simulation methods, achieving a computational speed more than 50 times faster than traditional full FEM simulation with an error of less than 5%.

The invention discloses a digital human real-time generation method and system fusing a layered light transmission model, and relates to the technical field of digital human modeling and real-time rendering. The method comprises the following steps: collecting optical parameters of each layer of skin, constructing a layered skin light transmission model and a radiation flux equation of each layer, carrying out layered adaptive photon mapping sampling, fusing radiation transmission results of each layer through a neural network accelerator, generating a skin material containing a dynamic reflectivity field, and outputting the skin material containing the dynamic reflectivity field. And finally, binding the optimized skin with a skeleton animation system in real time, and outputting a rendered digital human. Through layered optical modeling, dynamic sampling optimization, hardware acceleration rendering and the like, the skin optical optimization result is deeply embedded into the digital human modeling process, the skin rendering precision is improved, the dynamic adaptability is enhanced, and the problems that in the prior art, the skin of a digital human is not real, dynamic response is delayed, and the digital human is not real are solved. The skin texture and the muscle movement are not synchronous, and the like.

1. The name of this design product: Function expansion dock for visual portable monitoring radar. 2. Purpose of this design product: Used for three-dimensional optical modeling, coordinate positioning and other functional expansion of the visualization portable ground-based radar system. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The application discloses an evaluation method and device of a photoresist simulation model, a medium and a product, and relates to the technical field of photoetching simulation. The evaluation method of the photoresist simulation model comprises the following steps: obtaining photoresist parameters of a photoresist simulation model to be evaluated and an optical modeling file, wherein the optical modeling file comprises original optical modeling parameters used for constructing the photoresist simulation model to be evaluated; constructing a rotary photoresist simulation model according to the photoresist parameters and the optical modeling file; inputting the rotary optical modeling parameters into the rotary photoresist simulation model to obtain a rotary pattern size; comparing the rotary pattern size with a reference pattern size to obtain a size difference value, wherein the reference pattern size is a pattern size obtained by inputting the original optical modeling parameters into the photoresist simulation model to be evaluated; and evaluating whether the photoresist simulation model to be evaluated has an overfitting phenomenon according to the size difference value.

This invention provides a method for predicting the lifespan of an extreme ultraviolet pellicle using its transmittance. [Solution] The present invention provides a method for predicting the lifetime of an extreme ultraviolet pellicle, comprising the steps of: a) obtaining transmittance data of an extreme ultraviolet pellicle in a wavelength band from the infrared region to the ultraviolet region; b) obtaining complex refractive index data of an extreme ultraviolet pellicle in a wavelength band from the infrared region to the ultraviolet region; c) performing optical modeling using the transmittance data and the complex refractive index data to obtain information on the relationship between the density and transmittance of the extreme ultraviolet pellicle according to the wavelength; and d) measuring the transmittance of an extreme ultraviolet pellicle to at least one measurement beam having a wavelength belonging to the wavelength band from the infrared region to the ultraviolet region, extracting an estimated density of the extreme ultraviolet pellicle based on the measured transmittance and the information on the relationship between density and transmittance obtained in step c), thereby predicting the remaining lifetime of the extreme ultraviolet pellicle.

The invention discloses a thermal power plant high-risk equipment approaching intelligent early warning method comprising the following steps: collecting multi-source sensing data covering an operation area, and identifying the interference type of the current environment; when magnetic field interference is identified, performing distortion compensation on the original depth image by adopting a dual-time scale dynamic compensation method based on a magnetic-optical coupling physical model to generate a compensated depth image; when optical interference is identified, reversely deducing the contour of a person from the overexposed RGB image flow by using reverse optical modeling and motion continuity constraint, and reconstructing a virtual depth map; and the depth information and the RGB image flow are intelligently fused to accurately determine the three-dimensional space position of the personnel, the dangerous distance is calculated in combination with a high-risk equipment position database, the risk level is evaluated, and a graded early warning signal is output. According to the method, complex interference in the thermal power plant can be effectively dealt with, and the robustness and safety of personnel positioning are remarkably improved.

The invention relates to the technical field of infrared thermal imaging, in particular to a method for estimating motion data of a focusing group of a continuous zooming infrared system based on optical simulation, and particularly relates to optical modeling of the continuous zooming infrared system. Obtaining a focusing group motion amount matrix of the system in a theoretical state and a state containing a group of specified reference errors along with focal length and temperature change through optical simulation; calculating to obtain a difference matrix; acquiring motion data of a focusing group of a to-be-calculated system of the same design scheme, which contains unknown processing errors, along with focal length changes at normal temperature; calculating a scale factor of each focal section; calculating a focusing group motion data difference value matrix of a comparison theoretical state of the unknown error-containing to-be-calculated system; and calculating the motion data of the focusing group carrying the unknown error to-be-calculated system along with the focal length and the temperature change. According to the method provided by the invention, the acquisition process of the motion data of the focusing group is greatly simplified, and time and resources consumed according to a servo calibration method are saved.

Provided is an improved method, system, and computer program product to implement simulation for photonic devices. A composite, multi-domain simulation model is disclosed, with connected domain-specific representations that allow the use of the most relevant simulator technology for a given domain. The model has external connection points either expressed as actual ports or virtual ones, embodied by simulator API calls in the model.