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Extracting mineralization and alteration information and acquiring spatial distribution features of alteration rocks can be more efficient through digital image processing methods, combined with spectral analysis of rock and minerals, this paper introduced an effective information extraction method based on remote sensing image. An ASTER image covering middle cambrian mountainous area in Gejiu, Yunnan...
In this paper, a rule-based hierarchical approach is proposed for video parsing in the compressed domain. In this approach, three core factors of video parsing that is feature space, discontinuity metric and decision rule are stressed to improve the parsing performance. Firstly, the PCA-based feature is extracted in the compressed domain as the input of the framework, which shows superior performance...
A novel automatic real-time video parsing framework for gradual transition based on principal component analysis is presented. In this framework, three core factors of video parsing that is feature space, discontinuity metric and decision rule are stressed to improve the parsing performance. Through this PCA-based framework, the negative influence of significant camera or objects movement to the gradual...
With the phenomenal growth of the online and personal video repositories, an efficient and robust example-based video search solution is required to support applications like query by clip, query by capture, and repeated clip detection. In this letter, video sequences are represented as temporal trajectories via scaling and lower dimensional representation of the video frame luminance field, and a...
Efficient indexing is a key in content-based video retrieval solutions. In this paper we propose a new dynamic indexing scheme based on the kd-tree structure. Video sequences are first represented as traces in an appropriate low dimensional space via luminance field scaling and PCA projection. Then, the indexing scheme is applied to give the video database a manageable structure. Being able to handle...
Efficient indexing and robust retrieval are key features for an effective video retrieval system. In this paper we represent video sequences as traces in an appropriate low dimensional space via luminance field scaling and PCA projection, and introduce a combination of top-down and bottom-up strategies for indexing. Various means of introducing distortions in query clips are considered and several...
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