5 results about "Atmospheric optics" patented technology

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 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 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 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.