7 results about "Be star" patented technology

The application provides a disc area structure level determination method and device and electronic equipment. A first area containing a disc area is scanned line by line to obtain OCT volume data. A center point of the first area is taken as a center to star-type sample the OCT volume data to obtain a first number of first BScan two-dimensional section image data. An initial center point of the disc area is determined, and the OCT volume data is star-type sampled with the initial center point as the center to obtain a second number of second BScan two-dimensional section image data. The structure level of the disc area is determined. The OCT volume data is obtained in a line-by-line scanning manner, which ensures a high sampling rate. The sampled data is uniform and continuous. Star-type sampling is performed on the continuous data, which can avoid jumping and errors. In addition, the initial center point of the disc area is determined through star-type sampling, and then star-type sampling is performed with the initial center point as the center, which can obtain a more accurate disc area structure level.

The invention discloses a multi-star interference discrimination method for a high-sensitivity star sensor. The method comprises the following steps: acquiring a window graph by using the star sensor; judging whether a plurality of targets exist in the window graph or not, if so, entering the next step, otherwise, ending; judging whether a plurality of targets in the window image are star points or not, removing non-star points, if the number of the star points in the window image after removal is greater than 1, entering the next step, and otherwise, ending; and identifying a navigation star from the remaining star points. According to the method, the problems that a multi-target window is misjudged as a single-target window and an interference target is misjudged as a navigation star point in the prior art can be avoided, and the centroid positioning precision and the attitude measurement precision are effectively improved.

The present invention discloses a star point extraction method adaptable to stray light interference. First, the first step is stray light suppression, where the background image containing stray light is processed to obtain a star map with a clean background. The second step is star map binarization, where it is determined whether the difference between the central pixel and the edge pixels meets the threshold requirements in both the horizontal and vertical directions, and binarization processing is performed. The third step is noise suppression, where the single pixel noise remaining in the star map is suppressed. The fourth step is star point marking, where the rough centroid coordinates of the star points under each connected domain are calculated. The fifth step is star point centroid calculation, where the accurate centroid coordinates of the star points in the 15#imgabs0#15 region are calculated using the centroid method with a threshold. The star point extraction method disclosed by the present invention can cope with the interference of stray light such as moonlight, sunlight, and earth atmosphere light, and can ensure the stable operation of the starlight navigation device during its on-orbit period.

Method for supporting operation of a telescope in presence of bright, fast-moving objects, and a device for carrying out the method. When telescope is in operation, its orientation toward a field of observation is determined; an optical observation device is mounted in vicinity of the telescope, the device having field of observation with radius 1-10 degrees larger than field of observation of the telescope; optical observation device is oriented toward field of observation of the telescope; and bright objects are registered and direction and speed of movement thereof are determined. Objects having a speed and direction of movement indicating they are stars are identified, and this data is used for guiding the telescope and optical observation device. Artificial space objects and flying objects are identified, their parameters are determined and used for protecting the results of telescope observations from optical radiation from bright, fast-moving objects, mitigating those effects.

The invention relates to a planet identification method based on a KASP marker. The planet identification method comprises the following steps: (1) carrying out surface disinfection on a plant sample to be tested; (2) grinding the disinfected plant leaves into powder by using liquid nitrogen; (3) extracting the genome DNA of the sample, adjusting the DNA concentration to 5-50ng / mu L, and storing at 4 DEG C for later use; (4) selecting a specific SNP (Single Nucleotide Polymorphism) site on the basis of comparing the ppc-1E1c sequences of the astrophe plants; (5) designing two forward primers and a reverse primer according to the SNP site; (6) respectively adjusting the concentrations of the three primers to 36 [mu] M, 36 [mu] M and 90 [mu] M, and mixing the three primers according to a volume ratio of 1: 1: 1 to form a primer mixed solution; (7) preparing a reaction solution according to a reaction system: 5 [mu] L of template DNA, 5 [mu] L of KASP mastermix and 0.14 [mu] L of the primer mixed solution, and setting a negative control; (8) performing amplification according to a PCR program; and (9) judging whether the sample is a planet plant or not according to a fluorescence typing result. The method is rapid, accurate, low in cost and suitable for species identification, germplasm resource identification and molecular marker-assisted breeding of planets.

The present invention provides a method for optical detection and guidance of space targets based on star positioning, comprising the following steps: Step 1: Using a tracking camera to capture a star map and transmit it to a test device; Step 2: Recording the attitude quaternion output by a star sensor, and having the test device extract star points from the star map; Step 3: Projecting the star points based on the attitude quaternion of the star sensor and the theoretical installation quaternion of the star sensor and tracking camera to obtain calibration installation quaternions for the star sensor and tracking camera, and correcting the pointing deviation of the tracking camera; Step 4: Uploading the calibration installation quaternion to an electronic circuit box, which calculates the sky area pointed by the tracking camera based on the attitude of the star sensor and opens a wave gate when there are stars in the field of view, extracts star points, calculates the stellar vectors of the star points, and completes ground verification of the astronomical calibration function. The present invention solves the problem of finding stars with a tracking camera with a small field of view, and calibrates the pointing deviation of the tracking camera based on star positioning.

The present application provides a kind of geostationary orbit plane array camera on-orbit star extraction method and system, comprising: according to the principle of stationary orbit satellite plane array imaging, cold air is star area in the periphery of earth disc chart, and star image slides through camera field of view according to the direction from west to east;According to the basic data of star library, combined with satellite orbit, attitude data and imaging condition, the time of star appearing in field of view and the corresponding angle of camera two-dimensional scanning mechanism can be calculated;In actual star observation process, camera two-dimensional scanning mechanism is pointed to the predetermined position in advance according to the corresponding angle of predetermined observation star, and waits for star to appear;After star enters field of view, try to keep star in field of view range, star moves stably in plane array camera field of view, and continuously adjusts two-dimensional scanning mechanism angle along with the motion track of star, to keep continuous observation to star whole track process.