Nanjing University of Information Science & Technology

The 28th Research Institute of China Electronics Technology Group Corporation

Bo Wang

Guojie Wang

Wen Dai

Ruibo Qiu

Kai Chen

Ping Chen

Guan Wang

Yi Mao

Jiaxing Fan

Yunru Li

Daqing Huang

Xiaodong Zheng

Aili Liu

A photogrammetric ground control point quality evaluation method based on Monte Carlo test relates to the field of photogrammetry technology. Firstly, aerial photographs and ground control points from a survey area are obtained, the ground control points are numbered, the aerial photographs are performed with point-placing and aerial triangulation densification. Secondly, a Monte Carlo test experiment is designed, a certain number of the ground control points are selected as control points with the rest as check points, ensuring each ground control point as the control point a certain number of times, and average errors of the ground control points are calculated. Thirdly, average values of the average errors of the ground control points are calculated, standard deviations of the average errors of the ground control points are calculated. Finally, a quality coefficient Q of each ground control point is calculated and evaluated according to quality evaluation standards.

Photogrammetric ground control point quality evaluation method based on Monte Carlo test

A sand dune extraction method based on fusion of positive-negative terrains and light shading includes: obtaining an original digital elevation model of a study region; using a neighborhood analysis method to process the original digital elevation model of the study region, thereby extracting a positive terrain region and a negative terrain region of the study region; using a lighting shading method to perform six directional lighting simulation calculations on each pixel of the original digital elevation model of the study region to obtain a lighting shading map, and extracting a lighting region and a shadow region of the study region from the lighting shading map; using an embedding method to fuse the positive terrain region and the negative terrain region with the lighting region and the shadow region. The sand dune extraction method is a method for remote sensing monitoring and governance of desertification regions.

Sand dune extraction method based on fusion of positive-negative terrains and light shading

The present invention discloses a radar target spherical projection method for maritime formation. The method comprises the steps of converting the height of a radar target into an altitude and converting the position of the radar target into a spherical position, can be used for pre-processing radar data, supports multi-platform composite tracking based on a data chain, and contribute to generating a sharable single integrated picture (SIP) among formation members. The present invention can be widely applied to oceanic area formation operations such as coastguard patrol, sea escort, deep sea far sighting and maritime formation fight.

Radar target spherical projection method for maritime formation

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Nanjing, China

Bo Wang