36 results about "Airglow" patented technology

The invention provides a method for quantitatively calculating optical observation light pollution. The method comprises the following steps: establishing a yellow channel light semaphore simulation model, an air glow semaphore simulation model, a galaxy light semaphore simulation model and an atmospheric scattering light semaphore simulation model; performing actual observation by using an optical telescope to obtain a night-sky light observation semaphore; carrying out simulation calculation by utilizing the established simulation model to obtain a yellow channel optical semaphore, an airglow semaphore, a silver river system optical semaphore and an atmospheric scattered light semaphore; summing and calculating according to the obtained semaphore of the night-sky light component to obtain a night-sky light semaphore; and calculating the difference between the night-sky light observation semaphore obtained by the optical telescope and the night-sky light semaphore obtained by simulation calculation to obtain the light pollution observation semaphore. According to the method, quantitative calculation of the light pollution observation semaphore is achieved, large errors caused by analyzing light pollution through data observed by observation equipment are avoided, and initial site selection of the observatory and analysis and research in the optical observation process are facilitated.

The invention discloses a ground-based airglow imager for earthquake prediction and forecasting, which includes a converging lens group, a filter assembly, an image transfer mirror assembly and a detector assembly, wherein: the converging lens group is used for large field of view The aperture light beam is converged into a small-angle light beam and emitted to the relay mirror assembly; the relay mirror assembly includes a field mirror and a group of two relay mirror groups symmetrically arranged on the optical path, wherein the field mirror receives the The beams of the above-mentioned converging lens groups are injected into the two relay mirror groups in sequence, and the beams passing through the two relay mirror groups are injected into the detector assembly; the filter assembly is placed in the relay Between the mirror groups; the detector assembly is used to detect beam signals. The F-P narrow-band filter component adopted in the present invention can realize 1nm single-wavelength point filtering, and improves the signal-to-noise ratio of the entire system.

The invention relates to an image defogging method and system. The method comprises the following steps: inputting an original image, namely a colored fogged image; extracting a basic image and a detail layer of the colored fogged image, respectively; acquiring image data of three channels R, G and B of the basic image; solving the global airglow and transmissivity of each of the channels of the basic image, respectively; recovering a fogless image of each of the channels according to the global airglow and transmissivity of each of the channels of the basic image so as to acquire a fogless basic image; adding detail layer information into the fogless basic image; and carrying out smooth treatment as well as brightness and contrast enhancing treatment on the fogless basic image with the detail layer information to obtain a fogless original image. The method and system provided by the invention can be used for satisfying a real-time requirement and achieving a good defogging effect.

The invention provides a method for enhancing a granularity-controllable low-illuminance image. The method includes the steps that firstly, an light radiation field of an original low-illuminance image is obtained, then through estimation of the brightness of the original low-illuminance image, an adaptive brightness repair factor omega and basic light intensity A are prepared, and by the utilization of the standard deviation of the light radiation field, two adaptive Gaussian filters are prepared; finally, noise removal and fuzzification are conducted on the light radiation field through the two Gaussian filters and a recovered image is obtained through the adaptive brightness repair factor omega and the basic light intensity A. Due to the fact that an airglow scattering model reflecting the visible light imaging low is adopted, the image recovery effect can meet the human vision characteristic; the Gaussian filters are designed adaptively and the brightness repair factor and the basic light intensity are calculated adaptively, the adaption to scene changes is achieved; the method is suitable for color images, or gray level images or optical images or other spectrum images and has universality.

The airglow imaging interferometer for automatic remote sensing detection of upper atmosphere temperature and volume emissivity disclosed by the present invention comprises a tubular lens barrel, the inner wall of the lens barrel is sequentially provided with an incident diaphragm, a convex lens, a filter and a CCD detector from top to bottom. The imaging lens and the CCD detector are sequentially connected to the I / O interface of the Raspberry Pi and the computer through the data cable. The airglow imaging interferometer of the present invention is based on the FPI interference filter and the principle of "rotating spectral line temperature measurement method", uses filters to screen different diatomic and polyatomic airglow target light sources, and uses CCD detectors The interference fringes formed by the airglow are used for image acquisition, and at the same time, the 3rd generation B+ type of the Raspberry Pi is used to remotely control the CCD detector and realize information transmission, and the data analysis is performed on the computer and the results are displayed; the airglow imaging interferometer of the present invention has no moving parts, The measurement accuracy is improved and the cost is saved.