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A Study on Planetary Visual Odometry Optimization: Time Constraints and Reliability 被引量:1
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作者 Enrica Zereik Davide Ducco Fabio Frassinelli Giuseppe Casalino 《Computer Technology and Application》 2011年第5期378-388,共11页
Robust and efficient vision systems are essential in such a way to support different kinds of autonomous robotic behaviors linked to the capability to interact with the surrounding environment, without relying on any ... Robust and efficient vision systems are essential in such a way to support different kinds of autonomous robotic behaviors linked to the capability to interact with the surrounding environment, without relying on any a priori knowledge. Within space missions, above all those involving rovers that have to explore planetary surfaces, vision can play a key role in the improvement of autonomous navigation functionalities: besides obstacle avoidance and hazard detection along the traveling, vision can in fact provide accurate motion estimation in order to constantly monitor all paths executed by the rover. The present work basically regards the development of an effective visual odometry system, focusing as much as possible on issues such as continuous operating mode, system speed and reliability. 展开更多
关键词 Visual odometry stereo vision speeded up robust feature (SURF) planetary rover
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星际弥散吸收带 被引量:3
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作者 向福元 梁顺林 李爱根 《中国科学(G辑)》 CSCD 北大核心 2009年第4期481-493,共13页
星际弥散带(diffuse interstellar bands;DIBs)是源自星际空间的数百条吸收谱线的总称.自20世纪20年代首次发现两条DIBs以来,对DIBs的观测和证认已有80多年的历史.迄今为止,共观测到了300多条DIBs,但没有一条DIB的载体(carrier)被完全证... 星际弥散带(diffuse interstellar bands;DIBs)是源自星际空间的数百条吸收谱线的总称.自20世纪20年代首次发现两条DIBs以来,对DIBs的观测和证认已有80多年的历史.迄今为止,共观测到了300多条DIBs,但没有一条DIB的载体(carrier)被完全证认.DIBs的证认被认为是困扰着天文学家80多年的天体物理学的经典难题之一.我们简要回顾了星际弥散带的观测历史,介绍了银河系和河外星系星际弥散带的一些观测特征、星际紫外消光2175驼峰强度和星际弥散带的相关性、星际弥散带之间的相关性和星际弥散带的分类方法;对星周环境中是否存在弥散吸收带的观测结果也给予了简要的评述;讨论了星际弥散带的载体和起源. 展开更多
关键词 天体物理学 星际介质 星际消光 综述 星际弥散带 星周环境
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