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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 7. Отображено 7.
30-11-2011 дата публикации

Sign image recognition and center coordinate extraction method

Номер: CN0101846513B
Автор: QIQIANG FENG, GUANGYUN LI, ZONGCHUN LI, FENG QIQIANG, LI GUANGYUN, LI ZONGCHUN
Принадлежит:

The invention relates to a sign image recognition and center coordinate extraction method which comprises the steps of: firstly, finding a pixel with maximum gray value in a sign image by using a sign image recognition technology based on boundary searching, searching a boundary of a sign point towards the circumferential direction from the pixel, wherein the pixels contained in the boundary are all pixels included in the sign point; secondly, subtracting the gray values of all pixels in the found sign point from a gray threshold for denoising; and thirdly, calculating and extracting coordinates of a sign center in a pixel plane coordinate system by using a gray weighting centroid method and combining with position information of all pixels through using pixel gray values subtracted from the gray threshold as weights. The method has a small calculation amount and realizes accurate extraction of the coordinates of the sign image center.

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Номер записи: 1
11-02-2009 дата публикации

Spherical tank volume automatic measurement method based on lofting principle

Номер: CN0101363711A
Автор: ZONGCHUN LI, GUANGYUN LI, BAIXING FAN, JIANDONG WEI, GUANYU ZHANG, LI ZONGCHUN, LI GUANGYUN, FAN BAIXING, WEI JIANDONG, ZHANG GUANYU
Принадлежит:

The invention relates to an automatic volume measuring method for a spherical tank, and the automatic volume measuring method is based on the staking out principle. The automatic volume measuring method converts the pure measurement problem to staking out and measurement, proposes the concept of a coordinate system of the tank body, reasonably calculates staking out points of the inner surface of the spherical tank and links the measurement and the staking out through the coordinate conversion; and the automatic volume measuring method only needs to manually rotate a total station instrument to measure more than 4 initial points during the whole measurement process, then the system can complete the calculation of measured points, the automatic measurement, the data automatic storage, the volume automatic calculation, the output and other functions, thereby basically realizing the automation. The method can carry out the real-time calculation of the measurement precision of each measurement ...

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Номер записи: 2
29-09-2010 дата публикации

Sign image recognition and center coordinate extraction method

Номер: CN0101846513A
Автор: QIQIANG FENG, GUANGYUN LI, ZONGCHUN LI, FENG QIQIANG, LI GUANGYUN, LI ZONGCHUN
Принадлежит:

The invention relates to a sign image recognition and center coordinate extraction method which comprises the steps of: firstly, finding a pixel with maximum gray value in a sign image by using a sign image recognition technology based on boundary searching, searching a boundary of a sign point towards the circumferential direction from the pixel, wherein the pixels contained in the boundary are all pixels included in the sign point; secondly, subtracting the gray values of all pixels in the found sign point from a gray threshold for denoising; and thirdly, calculating and extracting coordinates of a sign center in a pixel plane coordinate system by using a gray weighting centroid method and combining with position information of all pixels through using pixel gray values subtracted from the gray threshold as weights. The method has a small calculation amount and realizes accurate extraction of the coordinates of the sign image center.

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Номер записи: 3
06-10-2010 дата публикации

Identification method of point-distributed coded marks

Номер: CN0101853396A
Автор: QIQIANG FENG, GUANGYUN LI, ZONGCHUN LI, FENG QIQIANG, LI GUANGYUN, LI ZONGCHUN
Принадлежит:

The invention relates to an identification method of point-distributed coding marks, comprising the following steps of: firstly, determining an initial point set and searching a point 3, a point 1 and a point 2; secondly, searching a point 4 and a point 5; and finally carrying out affine transformation and determining a coded value until all coded marks are identified. By using the method, accurate identification of all coded marks can be realized and the reasonability of the design of all point-distributed coding marks can be verified simultaneously.

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Номер записи: 4
29-09-2010 дата публикации

Image point matching method for industrial digital photogrammetry

Номер: CN0101846514A
Автор: QIQIANG FENG, GUANGYUN LI, ZONGCHUN LI, FENG QIQIANG, LI GUANGYUN, LI ZONGCHUN
Принадлежит:

The invention relates to an image point matching method for industrial digital photogrammetry. In the method, distances from image points to be matched to corresponding epipolar planes are utilized as constraint conditions, and images are grouped according to known points. The method comprises the following steps of: firstly, sorting the images into a plurality of groups according to whether containing the same object points; then, combining and matching parts of each group of images with better calculated geometrical quality; and finally, reversely calculating same-name image points on other images by utilizing the object points. By using the method, the matching speed and the matching accuracy can be improved. Proved by tests, compared with an image point matching method based on epipolar constraint, the method has less computation and small error.

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Номер записи: 5
23-11-2011 дата публикации

Image point matching method for industrial digital photogrammetry

Номер: CN0101846514B
Автор: QIQIANG FENG, GUANGYUN LI, ZONGCHUN LI, FENG QIQIANG, LI GUANGYUN, LI ZONGCHUN
Принадлежит:

The invention relates to an image point matching method for industrial digital photogrammetry. In the method, distances from image points to be matched to corresponding epipolar planes are utilized as constraint conditions, and images are grouped according to known points. The method comprises the following steps of: firstly, sorting the images into a plurality of groups according to whether containing the same object points; then, combining and matching parts of each group of images with better calculated geometrical quality; and finally, reversely calculating same-name image points on otherimages by utilizing the object points. By using the method, the matching speed and the matching accuracy can be improved. Proved by tests, compared with an image point matching method based on epipolar constraint, the method has less computation and small error.

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Номер записи: 6
14-07-2010 дата публикации

Spherical tank volume automatic measurement method based on lofting principle

Номер: CN0101363711B
Автор: WEI JIANDONG, LI ZONGCHUN, LI GUANGYUN, ZHANG GUANYU, FAN BAIXING, JIANDONG WEI, ZONGCHUN LI, GUANGYUN LI, GUANYU ZHANG, BAIXING FAN
Принадлежит:

The invention relates to an automatic volume measuring method for a spherical tank, and the automatic volume measuring method is based on the staking out principle. The automatic volume measuring method converts the pure measurement problem to staking out and measurement, proposes the concept of a coordinate system of the tank body, reasonably calculates staking out points of the inner surface ofthe spherical tank and links the measurement and the staking out through the coordinate conversion; and the automatic volume measuring method only needs to manually rotate a total station instrument to measure more than 4 initial points during the whole measurement process, then the system can complete the calculation of measured points, the automatic measurement, the data automatic storage, the volume automatic calculation, the output and other functions, thereby basically realizing the automation. The method can carry out the real-time calculation of the measurement precision of each measurement ...

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Номер записи: 7