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As visual ergonomics of human-machine display interface is highly affected by aircraft cockpit's luminous environment, it is proved to be of great engineering application values to carry out visual simulation and its evaluation during the early aircraft design phase. In order to obtain visual effects of the cockpit interface in typical optical environments, eye modeling, which is based on biomedical...
With the popularity of “bag of visual terms” representations of images, many text indexing techniques have been applied in large-scale image retrieval systems. However, due to a fundamental difference between an image query (e.g. 1500 visual terms) and a text query (e.g. 3-5 terms), the usages of some text indexing techniques, e.g. inverted list, are misleading. In this work, we develop a novel indexing...
A new visual servoing with obstacle avoidance method is presented in this paper. The basic idea of the method is to solve a constraint optimization problem using a sequential quadratic programming (SQP) method to get each control step. The objective function of the problem is a least squares of errors between the end-effector and the moving target in the image plane, and the constraint is used to...
Image annotation systems aim at automatically annotating images with some predefined keywords. In this paper, we propose an automatic image annotation approach by incorporating word correlations into multi-class support vector machine (SVM). At first, each image is segmented into five fixed-size blocks or tiles and MPEG-7 visual descriptors are applied to represent color and texture features of blocks...
Defining a lexicon of high-level concepts is the first step for data collection and model construction in concept-based image retrieval. Differences of semantic gaps among concepts are well worth considering. By measuring consistency in visual space and textual space, concepts with small semantic gap can be obtained. Considering so many diverse concepts in large-scale image dataset, we construct a...
To control mobile robot BCAR-01 remotely, a teleoperation system is presented with a multiple viewpoints virtual scene of the robot and its worksite. The constructed scene is used to get knowledge of the robot and its working environment, besides the real video feedback from the robot vision system. It can present images in multiple person viewpoints. In a complex task, operators can conveniently...
This paper presents a teleoperation system to control mobile robot remotely. The system architecture is based on network technology. To get a synthetical knowledge of the robot and its working environment, besides the real video feedback from the robot vision system, a multiple viewpoints virtual scene of the robot and its worksite is constructed. It can present images in first person and third person...
Concept-based multimedia search has become more and more popular in multimedia information retrieval (MIR). However, which semantic concepts should be used for data collection and model construction is still an open question. , there is very little research found on automatically choosing multimedia concepts with small semantic gaps. In this paper, we propose a novel framework to develop a lexicon...
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