Reference image generation based on three-dimensional realistic scene modeling for contour-based infrared ATR algorithm

2011 ◽  
Author(s):  
Hang Li ◽  
Delie Ming ◽  
Jinwen Tian ◽  
Chengqiang Gao ◽  
Feiran Jie ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Reference Image ◽  
Image Generation ◽  
Scene Modeling

Study on Dynamic IR Image Generation of Space Target

2014 ◽  
Vol 1044-1045 ◽  
pp. 1343-1348
Author(s):  
Wu Can He ◽  
Shou Yi Liao ◽  
Zuo Yu Zhang ◽  
He Xin Zhang
Keyword(s):  
Infrared Imaging ◽  
Three Dimensional ◽  
Orbit Space ◽  
Guidance System ◽  
Image Generation ◽  
Hardware In The Loop ◽  
Imaging Guidance ◽  
Infrared Star ◽  
Objective Basis ◽  
Space Target

Dynamic IR image generation of space target is one of the key technologies in hardware in the loop simulation for the infrared imaging guidance system. The three-dimensional entity model is created in the Creator, Sinda/Fluint is used to analyze each part of dynamic infrared radiation characteristics from on-orbit Space Target, on the basis of the LRS infrared star catalogues, celestial background modeling is built. In Vega, the dynamic IR image of space target is generated. The simulation results show that the dynamic IR image of Space Target provide the important objective basis for the hardware in the loop simulation for the infrared imaging guidance system.

scholarly journals Application of 3D Design Technology in the Construction of 220KV Miluoxi Substation

2021 ◽  
Vol 248 ◽  
pp. 02051
Author(s):  
Jiang Wen ◽  
Yang Jin Hu ◽  
Zhai Wei ◽  
Xu Guangbing ◽  
Xiang Xinxin ◽  
...  
Keyword(s):  
Mobile Application ◽  
Three Dimensional ◽  
Social Benefits ◽  
Construction Simulation ◽  
Scene Modeling ◽  
Economic Management ◽  
3D Design ◽  
Design Technology ◽  
Technology Application ◽  
Real Scene

In this paper, through the application of 3D design technology in the construction of 220kV Miluoxi substation, the main aspects of the application of 3D design technology in the construction are summarized, including inter discipline verification, collision inspection, real scene modeling, equipment 3D installation details, 4D construction simulation, VR technology application and mobile application solutions. This paper also summarizes the economic, management and social benefits of three-dimensional application, which can be used as a reference for the following projects.

Characteristics of pixel arrangements in various rhombuses for full-parallax three-dimensional image generation

2006 ◽  
Vol 45 (12) ◽  
pp. 2689 ◽  
Author(s):  
Jung-Young Son ◽  
Vladmir V. Saveljev ◽  
Kae-Dal Kwack ◽  
Sung-Kyu Kim ◽  
Min-Chul Park
Keyword(s):  
Three Dimensional ◽  
Image Generation ◽  
Dimensional Image

scholarly journals Studies on Three-Dimensional (3D) Modeling of UAV Oblique Imagery with the Aid of Loop-Shooting

2018 ◽  
Vol 7 (9) ◽  
pp. 356 ◽  
Author(s):  
Jia Li ◽  
Yongxiang Yao ◽  
Ping Duan ◽  
Yun Chen ◽  
Shuang Li ◽  
...  
Keyword(s):  
3D Modeling ◽  
Large Scale ◽  
3D Model ◽  
Three Dimensional ◽  
Scale Model ◽  
Scene Modeling ◽  
Standard Scale ◽  
Large Scale Model ◽  
City Construction ◽  
Key Steps

Oblique imagery obtained from an Unmanned Aerial Vehicle (UAV) has been widely applied to large-scale three-dimensional (3D) reconstruction; however, the problems of partially missing model details caused by such factors as occlusion, distortion, and airflow, are still not well resolved. In this paper, a loop-shooting-aided technology is used to solve the problem of details loss in the 3D model. The use of loop-shooting technology can effectively compensate for losses caused by occlusion, distortion, or airflow during UAV flight and enhance the 3D model details in large scene- modeling applications. Applying this technology involves two key steps. First, based on the 3D modeling construction process, the missing details of the modeling scene are found. Second, using loop-shooting image sets as the data source, incremental iterative fitting based on aerotriangulation theory is used to compensate for the missing details in the 3D model. The experimental data used in this paper were collected from Yunnan Normal University, Chenggong District, Kunming City, Yunnan Province, China. The experiments demonstrate that loop-shooting significantly improves the aerotriangulation accuracy and effectively compensates for defects during 3D large-scale model reconstruction. In standard-scale distance tests, the average relative accuracy of our modeling algorithm reached 99.87% and achieved good results. Therefore, this technique not only optimizes the model accuracy and ensures model integrity, but also simplifies the process of refining the 3D model. This study can be useful as a reference and as scientific guidance in large-scale stereo measurements, cultural heritage protection, and smart city construction.

Setpoint regulation of continuum robots using a fixed camera

Robotica ◽  
2007 ◽  
Vol 25 (5) ◽  
pp. 581-586 ◽  
Author(s):  
V. K. Chitrakaran ◽  
A. Behal ◽  
D. M. Dawson ◽  
I. D. Walker
Keyword(s):  
Visual Information ◽  
Robot Manipulator ◽  
Three Dimensional ◽  
The Body ◽  
Reference Image ◽  
Shape Information ◽  
Continuum Robots ◽  
Continuum Robot ◽  
Dimensional Shape ◽  
Three Dimensional Shape

SUMMARYIn this paper, we investigate the problem of measuring the shape of a continuum robot manipulator using visual information from a fixed camera. Specifically, we capture the motion of a set of fictitious planes, each formed by four or more feature points, defined at various strategic locations along the body of the robot. Then, utilizing expressions for the robot forward kinematics as well as the decomposition of a homography relating a reference image of the robot to the actual robot image, we obtain the three-dimensional shape information continuously. We then use this information to demonstrate the development of a kinematic controller to regulate the manipulator end-effector to a constant desired position and orientation.

scholarly journals Free-viewpoint image synthesis using superpixel segmentation

2017 ◽  
Vol 6 ◽  
Author(s):  
Mehrdad Panahpour Tehrani ◽  
Tomoyuki Tezuka ◽  
Kazuyoshi Suzuki ◽  
Keita Takahashi ◽  
Toshiaki Fujii
Keyword(s):  
Three Dimensional ◽  
Image Synthesis ◽  
Physical Distance ◽  
Depth Image ◽  
Reference Image ◽  
Sampling Density ◽  
Superpixel Segmentation ◽  
Limited Sampling ◽  
Reference Images

A free-viewpoint image can be synthesized using color and depth maps of reference viewpoints, via depth-image-based rendering (DIBR). In this process, three-dimensional (3D) warping is generally used. A 3D warped image consists of disocclusion holes with missing pixels that correspond to occluded regions in the reference images, and non-disocclusion holes due to limited sampling density of the reference images. The non-disocclusion holes are those among scattered pixels of a same region or object. These holes are larger when the reference viewpoints and the free viewpoint images have a larger physical distance. Filling these holes has a crucial impact on the quality of free-viewpoint image. In this paper, we focus on free-viewpoint image synthesis that is precisely capable of filling the non-disocclusion holes caused by limited sampling density, using superpixel segmentation. In this approach, we proposed two criteria for segmenting depth and color data of each reference viewpoint. By these criteria, we can detect which neighboring pixels should be connected or kept isolated in each references image, before being warped. Polygons enclosed by the connected pixels, i.e. superpixel, are inpainted by k-means interpolation. Our superpixel approach has a high accuracy since we use both color and depth data to detect superpixels at the location of the reference viewpoint. Therefore, once a reference image that consists of superpixels is 3D warped to a virtual viewpoint, the non-disocclusion holes are significantly reduced. Experimental results verify the advantage of our approach and demonstrate high quality of synthesized image when the virtual viewpoint is physically far from the reference viewpoints.

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