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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...
To better understand the attractiveness of host tree, Chinese white pines (Pinus armandi Fr.) to Chinese white pine beetle (Dendroctonus armandi Tsai and Li), the antennal responses of D. armandi to the host volatile, as well as the pure enantiomers and racemates of some monoterpenes, were examined using an electroantennogram (EAG). EAG responses of male and female D. armandi to blended volatiles...
The process of ecological restoration and reconstruction in Zhifanggou watershed forms a special ecosystem on the Loess Plateau. Little is known about the communities of arbuscular mycorrhizal fungi (AMF) and bacteria in this ecosystem. The aim of this study was to analyze the communities of AMF and bacteria, and their relationship in the rhizosphere of Caragana korshinkii and Hippophae rhamnoides...
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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