13 results about "Atmospheric optics" patented technology

The application provides an atmospheric optical turbulence prediction method and device, the method comprising: obtaining meteorological data at a first time and atmospheric coherence length data within a first time period; inputting the meteorological data into a target model to obtain a preliminary turbulence prediction result; extracting a time feature of the atmospheric coherence length data, and updating the preliminary turbulence prediction result based on the time feature to obtain an updated turbulence prediction result. The method reduces the interference of errors caused by the dynamics and randomness of turbulence on the turbulence prediction result, and improves the accuracy of atmospheric optical turbulence prediction.

The invention relates to the technical field of augmented reality, in particular to a 24-solar-term astronomical space-time presentation method and system based on mixed reality. The method comprises the following steps: firstly, reading augmented reality scene initialization data, configuring virtual scene parameters, and executing three-dimensional scene registration to generate a registration matrix; executing visual tracking by collecting an image stream, and generating a viewpoint transformation matrix; the system performs real-time sky semantic segmentation on an image stream to generate a binarized sky mask, and constructs an augmented reality rendering pipeline: synthesizing registration and viewpoint matrix calculation rendering operators, using the sky mask as an Alpha mask to perform pixel-level fusion of a virtual starry sky and a real sky, and combining sparse point clouds to perform depth occlusion synthesis, so as to obtain an augmented reality rendering pipeline. An atmospheric optical coloring model and a dynamic volume particle system are loaded for environmental atmosphere enhancement; and optical consistency fusion of a virtual image and a real environment is further realized through HDR luminosity alignment and tone mapping, and finally high-fidelity augmented reality superposition is realized.

The invention provides a laser radar satellite inversion method and system for optical parameters of background aerosol, and the method comprises the steps: carrying out the preprocessing of satellite-borne laser radar calibration data, and obtaining a vertical channel signal, a parallel channel signal and a hyperspectral channel signal of the background aerosol; performing day and night backscattering coefficient inversion on the vertical channel signal, the parallel channel signal and the hyperspectral channel signal by adopting different denoising strategies to obtain a night backscattering coefficient and a final backscattering coefficient; performing noise reduction processing on the accumulated atmospheric optical thickness corresponding to the night signal to obtain a night extinction coefficient; constructing a laser radar ratio climate field according to the night backscattering coefficient and the night extinction coefficient; and multiplying the climate field by the final backscattering coefficient through the laser radar to obtain a final extinction coefficient. By introducing an innovative multi-scale denoising and systematic deviation correction technology, the low signal-to-noise ratio challenge is effectively overcome, and the inversion precision is remarkably improved.

This application provides a method and apparatus for generating panoramic fog scene images based on depth information. The method includes: step S1, acquiring an outdoor panoramic image and its depth map; step S2, calculating the scattering coefficient corresponding to each image region based on the regional distribution of the outdoor panoramic image; step S3, calculating a light transmittance map based on the depth map and the scattering coefficient corresponding to each image region, and performing fogging processing on the outdoor panoramic image based on the light transmittance map and a preset atmospheric light value to obtain a panoramic fog scene image. The technical solution of this application calculates the scattering coefficient corresponding to each region based on the regional distribution of the outdoor panoramic image, which can simulate the physical characteristics of fog concentration changing with spatial position in the real atmosphere, such as denser at the bottom and lighter at the top, denser near and lighter far, making the generated fog scene image more in line with the atmospheric optical laws and improving the spatial layering and volume of the fog effect.

The application belongs to the technical field of lighting, and particularly relates to a lighting device control method, a computer readable storage medium and a lighting device. The method comprises the following steps: determining a solar elevation angle of a geographical position of a lighting device at a target moment; determining atmospheric optical quality of the target moment according to the solar elevation angle; determining a ground spectrum of the target moment according to the atmospheric optical quality and a preset extraterrestrial radiation spectrum; determining a color temperature of the target moment according to the ground spectrum and a preset tristimulus value function; and performing color temperature control on the lighting device according to the color temperature at the target moment. In the application, astronomical parameters and atmospheric radiation transmission parameters that influence natural sunlight are fully considered, and the accuracy is high, so that a better natural sunlight simulation effect can be achieved.

The present application relates to the field of optical imaging and atmospheric optics, and particularly relates to an experimental device and method for analyzing imaging characteristics of fog environment. The device comprises, in sequence along the light path, a camera real shooting and light source subsystem, a fog environment generating subsystem, a fog generating and concentration control subsystem, a transmitted light receiving subsystem and a data control unit. The present application realizes time sequence synchronization of fog generation, image acquisition and spectrum acquisition through the data control unit, establishes a quantitative mapping relationship between the fog concentration and the image chroma and brightness, and provides accurate experimental data basis for verification and optimization of the image dehazing algorithm, and has the characteristics of strong repeatability and high data reliability.

The application discloses a wedge mirror frosting and dewing judgment method and device based on image processing and belongs to the technical field of atmospheric optical measurement equipment. The method comprises the following steps: collecting images of stars after being split by a double-wedge mirror in real time and converting the images into gray-scale images; identifying star targets by adopting a YOLO series light model and extracting starlight spots of regions of interest; calculating three characteristic indexes of spot gray-scale uniformity, spot edge sharpness and star target contrast for each spot region of interest; obtaining an ambient temperature and a dew point temperature, combining preset judgment thresholds of the three characteristic indexes in S3, adopting a continuous frame judgment rule and judging whether frosting and dewing phenomena exist on the surface of the double-wedge mirror; and according to a frosting and dewing judgment result, controlling the start-stop and heating power of a transparent heating film on the surface of the double-wedge mirror, simultaneously monitoring image deformation states in a heating process and dynamically adjusting heating parameters. The application can realize automatic and accurate judgment of frosting and dewing of the double-wedge mirror.

The application discloses an airborne hyperspectral imager radiation correction method and system, which is used for improving the radiation correction accuracy under complex weather. The method comprises the following steps: calculating the theoretical sun position based on the initial coordinates of the unmanned aerial vehicle, ephemeris data and atmospheric parameters; combining the IMU heading and wind speed and direction data to perform heading and differential compensation on the sun azimuth angle, and performing refraction correction on the elevation angle, and outputting high-precision sun position parameters; synchronously collecting hyperspectral images and irradiance data, using quaternion interpolation combined with IMU data to realize space-time alignment and eliminate attitude disturbance; constructing a hemispherical space irradiance model based on the aligned data, dividing the cloud layer mode (clear sky, thin cloud and thick cloud) according to the atmospheric optical thickness variance, and respectively adopting Lambert body proportional correction, discrete longitudinal scale method or deep convolution spectral network for radiation correction. The application significantly improves the correction accuracy and generalization ability, supports large-area image splicing, and is suitable for quantitative applications such as geological exploration and environmental monitoring.

The invention relates to the technical field of atmospheric optical detection, and discloses an atmospheric transparency detection device for quantum entangled photons. The quantum entanglement light source module is used for generating entanglement photon pairs associated in the time dimension, and the entanglement photon pairs comprise signal photons and reference photons; according to the quantum entanglement light source monitoring system, background noise such as sunlight is efficiently filtered out by means of entanglement photon pair time relevance and a coincidence measurement mechanism, all-day stable monitoring is achieved, and the daytime measurement problem of a traditional technology is solved; by comparing a reference photon counting rate with a signal photon counting rate, a light source fluctuation error is counteracted, narrow-band filtering and a high-sensitivity single-photon detector are matched, the precision bottleneck is broken through, and high-precision parameter inversion is achieved; flexible switching of two detection paths is supported, multi-scene requirements are met, and reliable support is provided for atmosphere refined and real-time monitoring.

The application discloses an atmospheric coherence length measurement self-adaptive pointing tracking method and system, belongs to the technical field of atmospheric optical measurement instruments, and solves the technical problems of low recognition and alignment efficiency, weak self-adaptive adaptation capability, insufficient anti-interference performance and poor system cooperation in the prior art. A star camera is used to collect a starry sky area image of a target star area; after the image is analyzed and a celestial body measurement parameter is obtained, a turntable is finely adjusted so that the target star is on a target surface of a main mirror camera; exposure time and gain of the main mirror camera are adjusted; two light spots of the target star are automatically adjusted to be centered on a field center of the main mirror camera; a target star image is collected; an atmospheric coherence length value is calculated in real time; whether the atmospheric coherence length value is empty or an abnormal value is determined at a fixed interval; if yes, the turntable automatically points to a next target star; and if not, an atmospheric coherence length measurement task is continuously executed. The application is used for realizing fast alignment and stable tracking of a beacon light source in a weak light environment at night.

The invention discloses an infinite time sequence laser atmospheric transmission simulation method, and belongs to the technical field of laser communication and atmospheric optical simulation. The method comprises the following steps: firstly, extracting ERA5 meteorological data, and constructing a non-uniform atmospheric turbulence profile; determining a phase screen spacing according to system parameters, and pre-generating each layer of initial phase screen and a prediction and update matrix for recursion; in a transmission link, Fresnel diffraction is calculated layer by layer by using a GPU accelerated step-by-step Fourier transmission method; in a time sequence evolution link, a traditional freezing turbulence ultra-large phase screen mode is abandoned, integer pixel updating and sub-pixel interpolation correction are carried out on phase screen displacement according to the transverse wind speed of each space layer, new phase data are generated in a recursive mode on the wind inlet side, external phase data of a grid are deleted, and continuous time sequence evolution of the phase screen is achieved on the grid with the fixed size. According to the invention, high-precision long-time-sequence laser transmission dynamic simulation at any place is realized under relatively low hardware overhead.

The invention discloses an adaptive directional tracking method and system for atmospheric coherent length measurement, belongs to the technical field of atmospheric optical measurement instruments, and solves the technical problems of low recognition and alignment efficiency, weak adaptive capability, insufficient anti-interference performance and poor system collaboration in the prior art. Collecting a starry sky area image of the target fixed star area by using a star guide camera; analyzing the image to obtain a celestial body measurement parameter, then finely adjusting the rotary table to enable the target star to be on the target surface of the primary mirror camera, adjusting the exposure time and gain of the primary mirror camera, and automatically adjusting two light spots of the target star to be centered at the view field center of the primary mirror camera; collecting a target fixed star image, and calculating an atmospheric coherence length value in real time; and judging whether null values and abnormal values appear in the atmospheric coherence length numerical values at fixed time intervals, if so, automatically pointing to the next target fixed star by the turntable, and if not, continuing to execute the atmospheric coherence length measurement task. The method is used for realizing rapid alignment and stable tracking of the beacon light source in the night weak light environment.