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Manual-Control Rendezvous and Docking (MCRVD) is a complex and demanding task which requires astronauts to control the direction of six-freedom of the spacecraft accurately by hand. Its performance has a close relationship among the design of the spacecraft HCI, the control ability of the astronaut, and the matching effect of the two factors above. In this paper, human performance for these tasks...
Situation Awareness (SA) is a vital factor in manmachine systems. In the classic information processing model of SA, the elements within human cognition, system properties and SA-judgement itself effect with each other, which makes the SA a complicated system. In order to research SA in a comprehensive way, the approach of Fuzzy Cognitive Maps(FCM) is used to remodel and analyze it. Through standard...
Scene text detection is a challenging task for the text-based information extraction systems. We present a novel scene text detection method for this task. The images are over-segmented into meaningful perceptron superpixels, and candidate connected components (CCs)are extracted by combining local contrast and color consistency. The non-text components are then pruned by a hierarchical model consisting...
The iterative closest point (ICP) algorithm is an accurate approach for the registration between two point sets on the same scale. However, it can not handle the case with different scales. This paper proposes a fast and robust ICP algorithm for isotropic scaling point sets registration (FRISICP). In order to accurately and directly estimate the scale factor without any constraints, we introduce a...
Since Jacquin proposed original fractal image compression technique in 1990, fractal coding method has been developed into various schemes. Traditionally, fractal coding uses mean square error (MSE) to evaluate similarity of image blocks, but the similarity evaluated by MSE usually differs from human visual system (HVS). Compared with MSE, structural similarity (SSIM) is an image measure index which...
In this paper, a new hybrid method for text detection in natural scene is proposed. According the linguistics rules, this algorithm mainly consists of three parts. First, considering both unary property and binary relationship, the conditional random field (CRF) model is introduced for text region detection. Second, connected components (CCs) are extracted by similar stroke width, and filtered coarsely...
In this paper, we present a method to extract moving objects in monocular image sequences. The proposed method is based on graph cuts defined on a spatio-temporal region adjacency graph (RAG). First, we initially over-segment each frame in the video, and take the over-segmented regions as the vertices in the 3D spatio-temporal graph. Second, multiple cues are fused together to extract objects accurately...
We propose a new approach to motion segmentation that is based on auto-generated strokes. The novelty of the approach is twofold. First, inspired by recent work of other researchers we formulate the problem as that of interactive segmentation. Instead of inputting the strokes by the user, the strokes in our approach are auto-generated. The second novelty of the paper is formulation in which, unlike...
This paper describes a cluster-based transcoder that could transcode MPEG-2 format video files to MPEG-4 and H.264 format video files with faster transcoding speed than traditional single PC transcoder1. A seamless method of video division and a novel multi-resolution load balancing algorithm for distributed transcoding are proposed, and meanwhile, a fast algorithm for embedding watermarking is presented...
In this paper, we propose an image coding approach using wavelet-based adaptive contourlet transform. The approach adopts the wavelet transform to implement subband decomposition to replace Laplace pyramid decomposition in contourlet transform, and thus the redundancy caused by the Laplace pyramid decomposition can be eliminated. Moreover, it chooses the directional filter banks as a key technique,...
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