A method based on local HSV image and the shape of object to recognize object is proposed for robot tracking. After the color segment, the knowledge of the shape of objects is used to recognize objects. The robot trac...A method based on local HSV image and the shape of object to recognize object is proposed for robot tracking. After the color segment, the knowledge of the shape of objects is used to recognize objects. The robot tracking result testifies the avail-ability of the method.展开更多
A snake algorithm has been known that it has a strong point in extracting the exact contour of an object. But it is apt to be influenced by scattered edges around the control points. Since the shape of a moving object...A snake algorithm has been known that it has a strong point in extracting the exact contour of an object. But it is apt to be influenced by scattered edges around the control points. Since the shape of a moving object in 2D image changes a lot due to its rotation and translation in the 3D space, the conventional algorithm that takes into account slowly moving objects cannot provide an appropriate solution. To utilize the advantages of the snake algorithm while minimizing the drawbacks, this paper proposes the area variation based color snake algorithm for moving object tracking. The proposed algorithm includes a new energy term which is used for preserving the shape of an object between two consecutive images. The proposed one can also segment precisely interesting objects on complex image since it is based on color information. Experiment results show that the proposed algorithm is very effective in various environments.展开更多
Conventional correlation matching algorithms waste great time in invalid area search. This paper proposes a color tracking method based on correlation search area optimization on target characteristic hue decision. By...Conventional correlation matching algorithms waste great time in invalid area search. This paper proposes a color tracking method based on correlation search area optimization on target characteristic hue decision. By quantifying and reducing dimensions of HSV（ hue saturation value） color space, a one-dimensional hue space is constructed. In the space, the target characteristic hue granule set is constructed, which contains attributes such as value, area and average distance between pixels and aiming center. By using granular computing method, the similarity between target and search blocks is obtained and the invalid search areas can be removed. The color tracking experiment has proved that the algorithm can improve real time performance for conventional matching algorithms without precision lost.展开更多
To evaluate the light field display system with a liquid crystal display(LCD) and a holographic functional screen(HFS),the voxel theory based on the ray tracing is used.By analyzing the voxels defined by the cases of ...To evaluate the light field display system with a liquid crystal display(LCD) and a holographic functional screen(HFS),the voxel theory based on the ray tracing is used.By analyzing the voxels defined by the cases of corresponding pixels overlapping completely and partially in the image space,the resolution characteristics of the system are discussed.The theoretical model is verified in the reconstruction experiment of a resolution target and compared with the calculation result of the presented system.Finally,we give an optimization method for the display image quality.展开更多
基金Supported by the National 863 Program of China(No.2002AA421170).
文摘A method based on local HSV image and the shape of object to recognize object is proposed for robot tracking. After the color segment, the knowledge of the shape of objects is used to recognize objects. The robot tracking result testifies the avail-ability of the method.
文摘A snake algorithm has been known that it has a strong point in extracting the exact contour of an object. But it is apt to be influenced by scattered edges around the control points. Since the shape of a moving object in 2D image changes a lot due to its rotation and translation in the 3D space, the conventional algorithm that takes into account slowly moving objects cannot provide an appropriate solution. To utilize the advantages of the snake algorithm while minimizing the drawbacks, this paper proposes the area variation based color snake algorithm for moving object tracking. The proposed algorithm includes a new energy term which is used for preserving the shape of an object between two consecutive images. The proposed one can also segment precisely interesting objects on complex image since it is based on color information. Experiment results show that the proposed algorithm is very effective in various environments.
文摘Conventional correlation matching algorithms waste great time in invalid area search. This paper proposes a color tracking method based on correlation search area optimization on target characteristic hue decision. By quantifying and reducing dimensions of HSV（ hue saturation value） color space, a one-dimensional hue space is constructed. In the space, the target characteristic hue granule set is constructed, which contains attributes such as value, area and average distance between pixels and aiming center. By using granular computing method, the similarity between target and search blocks is obtained and the invalid search areas can be removed. The color tracking experiment has proved that the algorithm can improve real time performance for conventional matching algorithms without precision lost.
基金supported by the National High Technology Research and Development Program of China(Nos.2012AA011902 and 2015AA015902)the National Natural Science Foundation of China(No.61177018)+1 种基金the State Key Laboratory of Information Photonics and Optical Communicationsthe Program of Beijng Science and Technology Plan(No.D121100004812001)
文摘To evaluate the light field display system with a liquid crystal display(LCD) and a holographic functional screen(HFS),the voxel theory based on the ray tracing is used.By analyzing the voxels defined by the cases of corresponding pixels overlapping completely and partially in the image space,the resolution characteristics of the system are discussed.The theoretical model is verified in the reconstruction experiment of a resolution target and compared with the calculation result of the presented system.Finally,we give an optimization method for the display image quality.
