نتایج جستجو برای: map merging

تعداد نتایج: 211287  

2003
Benjamin Stewart Jonathan Ko Dieter Fox Kurt Konolige

We present an application of hierarchical Bayesian estimation to robot map building. The revisiting problem occurs when a robot has to decide whether it is seeing a previously-built portion of a map, or is exploring new territory. This is a difficult decision problem, requiring the probability of being outside of the current known map. To estimate this probability, we model the structure of a ”...

2013
Zaki B. Nossair Abdulwahab Alsammak Shimaa S. Ali

Multi-robot map merging is an essential task for cooperative robots navigation. Each robot is building its own local map with different reference. To merge these maps to global one, the transformation between the local maps must be computed so that we have one reference. Data association and inter robot observations are two alignment methods which are used to compute the transformation paramete...

2016
Chenxing Xia Hanling Zhang

In this paper, we propose an improved mechanism for saliency detection. Firstly,based on a neoteric background prior selecting four corners of an image as background,we use color and spatial contrast with each superpixel to obtain a salinecy map(CBP). Inspired by reverse-measurement methods to improve the accuracy of measurement in Engineering,we employ the Objectness labels as foreground prior...

2005
Yih-Chen Chang Wen-Cheng Lin Hsin-Hsi Chen

This paper regards images with captions as a cross-media parallel corpus, and presents a corpus-based relevance feedback approach to combine the results of visual and textual runs. Experimental results show that this approach performs well. Comparing with the mean average precision (MAP) of the initial visual retrieval, the MAP is increased from 8.29% to 34.25% after relevance feedback from cro...

2006
Philip H. P. Nguyen Dan Corbett

This paper presents an approach for building corporate knowledge, defined as the total knowledge acquired by an enterprise in its business dealings, through integration of its existing ontologies. We propose to represent corporate knowledge as the final merged ontology, defined under our formalism, in which a canon, or common ontology, is used as the standard under which all other ontologies ar...

2015
Deepaly Satpute Ranjana Shende

This paper presents a quantitative comparison of several multi-view stereo reconstruction algorithms. In this paper, we propose a depth-map merging based hybrid method for large-scale scenes which takes both accuracy and efficiency is used into account. Different from typical multiview stereo methods, our approach is not only imposes the photo consistency constraint, but also associates explici...

2003
Dieter Fox Jonathan Ko Kurt Konolige Benjamin Stewart

We present an application of hierarchical Bayesian estimation to robot map building. The revisiting problem occurs when a robot has to decide whether it is seeing a previouslybuilt portion of a map, or is exploring new territory. This is a difficult decision problem, requiring the probability of being outside of the current known map. To estimate this probability, we model the structure of a "t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد 1388

یکی از مسائلی که در سیستم sar مطرح می شود مسأله نویز speckle می باشد. منبع تولید نویز speckle فاز نسبی پراکنده گرهای مختلف در یک سلول رادار می باشد که نوسانات شدیدی در سیگنال دریافتی به وجود آورده و تصویر حاصل را دانه دانه می نماید. این نویز تفسیر تصاویر را مشکل و اطلاعات زیادی را مخفی می کند و لذا کاهش آن یکی از ملزومات در پردازش سیگنال sar است. الگوریتمهای متعددی جهت کاهش نویز speckle در نوا...

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