36 results about "Airglow" patented technology

The invention discloses a dark channel prior based image defogging method which includes the steps of 1, dividing the image I(x) on the basis of the classical clustering algorithm to acquire a candidate sky region It(x); 2, corroding the candidate sky region It(x) to acquire sky brightness; 3, performing mini-value filtering on the image to improve the same according to the sky brightness so as to acquire a coarse-estimation transmissivity image; 4, optimizing the coarse-estimation transmissivity image by means of guide filtering to acquire a transmissivity image; and 5, acquiring a recovered image based on an atmospheric scattering model. The dark channel prior based image defogging method has the advantages of processing airglow more reasonably, reducing image block effect, improving overall brightness of images and making the images more natural.

The invention provides a picture processing method and device. The edge information of a collected picture is reserved by introducing a guidance map, so that the display quality of a target picture which is obtained after a fog-degraded image is processed through an atmospherical scattering model is improved. The method comprises the steps that a gray level image is determined according to the smallest value among the brightness values of the three RGB channels of each pixel in the collected picture; a guidance map is generated according to the gray level image through a bilateral filter algorithm, and an airglow value is determined according to the gray level image through a dark channel defogging algorithm; the gray level image is processed according to the guidance map through the bilateral filter algorithm, and an airglow curtain picture is determined; the transmissivity of pixels in the collected picture is determined according to the airglow value and the airglow curtain picture; a target picture is determined according to the collected picture, the airglow curtain picture and the transmissivity through the atmospherical scattering model.

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 discloses an image real-time defogging method based on a graphics processor, mainly solving the problem that in the prior art, a computer CPU (Central Processing Unit) has a slow processing speed, and is not suitable for performing real-time defogging on high-definition images. The method comprises the steps of: 1, initializing a computer, inputting a fogging image and reading image data; 2, calculating a dark channel image for inputting the fogging image; 3, calculating a airglow value according to the dark channel image; 4, calculating the initial transmissivity image for inputting the fogging image; 5, guiding the initial transmissivity image to be filtered to obtain a final transmissivity image; and 6, restoring a photographic field according to the final transmissivity image, and outputting a clear and defogged image. The method can guarantee better defogging effects, has a fast processing speed, meets the real-time defogging requirement of a 10180p image, and can be used for high-definition image real-time defogging processing.

The invention discloses an upper atmosphere airglow blast-temperature imager for atomic frequency discrimination, which is used for airglow detection of space atmosphere. The imager comprises a receiving telescope (4), an optical filter (5), a spectral component (6), a center-band atomic frequency discrimination component (31), a left and a right side band atomic frequency components (11, 12), three imaging lens (12, 22, 32) and three imaging CCDs (13, 23, 33). The imager allocates the received airglow to a center-band atomic frequency discrimination channel (3) and the left and the right side band automatic frequency discrimination channels (1, 2), obtains the intensities of the full airglow spectrum, the left edge spectrum and the right edge spectrum respectively, and obtains the intensity of the airglow and the distribution of the temperature and the wind field of the atmosphere at the location issuing the airglow simultaneously. The invention has the advantages that multi detection functions are provided, the wave length is stable without drift, the precision of frequency discrimination is high, the detection error is small, and the work is stable and reliable.

The invention provides a dayglow temperature photometer and a method thereof for detecting airglow spectrum intensity and temperature. An echelon grating and a narrow-band interference filter equipped with a micro-angle stepping motor are organically combined to serve as a core device of the dayglow temperature photometer, the high spectral resolution is obtained, the range of spectrum detection is broaden by rotating narrow-band filter, and luminous intensity and temperature of dayglows in an upper atmosphere are detected simultaneously by utilizing a high-resolution spectroscopic method and a rotational spectral-line temperature-measuring method. The dayglow temperature photometer comprises four portions including a light guide system, a telescopic system, a light splitting system and an imaging system which are sequentially arranged.

The invention relates to an airglow imager. In order to solve the problems that an existing airglow imager is small in detecting view field and narrow in spectral range and needs to adopt a mechanicalfocusing device, so that the structure of the existing imager and using operation are complex, and the luminous flux of the existing imager is low, the wide spectral segment non-focusing all-day airglow imager is provided. The imager comprises an image space telecentric fish-eye lens, an object space telecentric imaging lens and a detector; a filter wheel is arranged between the fish-eye lens andthe imaging lens, a plurality of narrow band filters with different wave bands and the focal power of zero are arranged on the filter wheel, and the narrow band filters can be switched to a focal plane of the fish-eye lens through the filter wheel; the fish-eye lens comprises a negative light focal power front lens set and a positive light focal power back lens set, and an aperture diaphragm is arranged on a light path between the front lens set and the back lens set; the imaging lens comprises a plurality of gluing lenses composed of plus lenses and concave lenses, the absolute value of a relative abbe number difference value of the plus lenses and the concave lenses is greater than or equal to 5, and the absolute value of a relative dispersion difference value of the plus lenses and theconcave lenses is less than or equal to 0.001.

The invention provides an all-sky atmospheric gravity wave imaging instrument adopting a fish eye lens and a telecentric beam path, which comprises the No. F2.8 fish eye lens with the focus of 10.5mm, a telecentric lens, a circular light filter with the diameter of 3 inches, a focus reducing lens group, an imaging lens and a scientific grade CCD camera, and OH, O2, OI, Na and other airglows are radiated as tracers, thereby realizing the all-sky atmospheric gravity wave imaging. The telecentric lens is placed in the rear position of a focal plane of the fish eye lens, thereby leading emergent light to meet the requirements on the angle of incident light of the light filter; and then the light sequentially passes through the circular light filter, the focus reducing lens group for focusing and adjusting aberration, the imaging lens and the connected scientific grade CCD camera, thereby realizing the all-sky 180-degree atmospheric gravity wave imaging. The all-sky atmospheric gravity wave imaging instrument utilizes the No. F2.8 fish eye lens with the focus of 10.5mm which is commercially universal at present and is matched with the multi-channel light filter with 3 inches, thereby being more economic and convenient to realize the multi-channel all-sky gravity wave imaging on the basis of ensuring the high light throughput of the whole system.

The invention discloses a method and a device of image dehazing, wherein the method comprises calculating a dark primary color image I (x, y) according to a primary image and obtaining airglow A corresponding to the dark primary color image; estimating the dark primary color image and accordingly obtain a first transmission diagram of an atmospheric scattering module, and adopting Gaussian filtering to conduct edge thinning on the first transmission diagram and accordingly obtain a second transmission diagram; and conducting recovery operations on the a primary image I (x, y) according to the second transmission diagram and the airglow and accordingly obtain a fog-free image. By adopting the method and the device of image dehazing, an outdoor video system can normally work even on heavy fog scenes, and relatively clear images can be acquired.

The invention relates to a night traffic block port image enhancement method based on dark channel prior, and the method comprises the following steps: a night traffic block port image is inputted, and a night image dark channel is inversed to obtain an inversed night block port image; the inversed block port image is used to acquired a dark channel image; global airglow in an atmospheric scattering model is calculated; according to the global airglow, a transmissivity image is obtained; guiding filtering makes the transmissivity image to be fine; according to the global airglow and fine transmissivity image, a inversed image of an enhanced night traffic block port image is obtained based on the atmospheric scattering model; the inversed image is inversed again, a final enhanced night traffic block port image is obtained.

For the detection of geotectonic signals triggered by a geotectonic event, an infrasonic wave accompanying the geotectonic event and being generated at the ground and temperature fluctuations are utilized, causing a modulation of an airglow. The modulation of the airglow is detected from the ground by means of an infrared spectrometer and the mesopause temperature is measured with a high temporal resolution. For the detection of a geostationary event, a number of simultaneously operated infrared spectrometers is provided in regions sensitive to geotectonic events.

The invention discloses an airglow imaging interferometer for detecting an upper atmospheric temperature and a volume emission rate in an automatic remote sensing mode. The airglow imaging interferometer comprises a tubular lens barrel, wherein the inner wall of the lens barrel is sequentially provided with an incident pupil, a convex lens, an optical filter and an imaging lens of a CCD detector from top to bottom, wherein the CCD detector is sequentially connected with an I\O interface of a Raspberry Pi and the computer by means of data lines. The airglow imaging interferometer adopts the optical filter for screening different diatomic and polyatomic airglow target light sources based on an FPI interference optical filter and the principle of ''rotational line temperature measurement method'', adopts the CCD detector for carrying out image acquisition on interferometric fringes formed by airglow, controls the CCD detector remotely and realizes information transmission by utilizing a Raspberry Pi third-generation B+ type, and performs data analysis and displays a result on the computer; and the airglow imaging interferometer has no moving parts, improve the measurement precision and saves the cost.

The invention relates to an airglow gravity wave multi-parameter detector. The airglow gravity wave multi-parameter detector comprises a shell, and a spectral temperature detection module and a large-view-field gravity wave imaging module which are arranged on the shell. The spectral temperature detection module comprises an optical window, a field diaphragm, an achromatic doublet lens, a first narrow-band interference filter, a lens, a first refrigeration CCD sensor and a first metal support from top to bottom. The large-view-field gravity wave imaging module comprises a hemispherical opticalwindow, a wide-angle lens, a first optical fiber light cone, a second narrow-band interference filter, a second optical fiber light cone, a second refrigeration CCD sensor and a second metal supportfrom top to bottom. The airglow gravity wave multi-parameter detector provided by the invention can detect the atmospheric temperature and the airglow radiation intensity at the same time, and multi-parameter observation is realized.

In order to derive the temperature in the mesopause region from hydroxyl (OH*) airglow, in which intensities of three lines of OH* emission and a basic position are measured during the night using ground-based IR spectrometers, a noisy OH* spectrum is smoothed by filtering out white noise superimposed on the measured OH* intensities, by means of a spectral analysis method in the form of a harmonic analysis and by means of adaptation using the Voigt function which is carried out in the form of a combination of a Lorentz distribution and a Doppler distribution. A decision is made on the quality of the adaptation of the smoothed spectrum obtained to the original spectrum using statistical characteristic variables and by selecting one of the two methods, harmonic analysis function or Voigt function, and the temperature is thus accurately determined.

The invention discloses a foundation airglow imaging instrument used for earthquake prediction and forecasting. The foundation airglow imaging instrument comprises a convergent lens group, a filtering assembly, an image rotation lens assembly and a detector assembly, wherein the convergent lens group is used for converging a large-view-field aperture light beam into a low-angle light beam and emitting the low-angle light beam to the image rotation lens assembly; the image rotation lens assembly comprises a field lens and two image rotation lens groups symmetrically arranged on a light path, the field lens receives the light beam from the convergent lens group and transmits the light to the two image rotation lens groups in sequence, and the light beam passing through the two image rotation lens groups is transmitted into the detector assembly; the filtering assembly is arranged between the image rotation lens groups; and the detector assembly is used for detecting a light beam signal. The F-P narrow-band filtering assembly adopted by the instrument is capable of filtering a 1 nm single wavelength point, thereby improving the signal to noise ratio of the whole system.