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496 results on '"Wu, Ja-Ling"'

208. ITEMS

Author

Liu, Chih-Chieh, primary, Huang, Chun-Hsiang, additional, Chu, Wei-Ta, additional, and Wu, Ja-Ling, additional

Published
2007
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209. RoleNet

Author

Weng, Chung-Yi, primary, Chu, Wei-Ta, additional, and Wu, Ja-Ling, additional

Published
2007
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220. Audiovisual slideshow

Author

Chen, Jun-Cheng, primary, Chu, Wei-Ta, additional, Kuo, Jin-Hau, additional, Weng, Chung-Yi, additional, and Wu, Ja-Ling, additional

Published
2006
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221. Tiling slideshow

Author

Chen, Jun-Cheng, primary, Chu, Wei-Ta, additional, Kuo, Jin-Hau, additional, Weng, Chung-Yi, additional, and Wu, Ja-Ling, additional

Published
2006
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238. Improvement of Commercial Boundary Detection Using Audiovisual Features.

Author

Ho, Yo-Sung, Kim, Hyoung Joong, Chen, Jun-Cheng, Yeh, Jen-Hao, Chu, Wei-Ta, Kuo, Jin-Hau, and Wu, Ja-Ling

Abstract

Detection of commercials in TV videos is difficult because the diversity of them puts up a high barrier to construct an appropriate model. In this work, we try to deal with this problem through a top-down approach. We take account of the domain knowledge of commercial production and extract features that describe the characteristics of commercials. According to the clues from speech-music discrimination, video scene detection, and caption detection, a multi-modal commercial detection scheme is proposed. Experimental results show good performance of the proposed scheme on detecting commercials in news and talk show programs. [ABSTRACT FROM AUTHOR]

Published
2005
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239. Low-Bitrate Video Quality Enhancement by Frame Rate Up-Conversion and Adaptive Frame Encoding.

Author

Ho, Yo-Sung, Kim, Hyoung Joong, Yang, Ya-Ting, Tung, Yi-Shin, Wu, Ja-Ling, and Weng, Chung-Yi

Abstract

Frame rate up-conversion (FRUC) is a useful technique for a lot of practical applications, such as display format conversion, low bitrate video coding and slow motion playback. Unlike traditional approaches, such as frame repetition or linear frame interpolation, motion-compensated frame interpolation (MCFI) technique which takes block motion into account is regarded as a more efficient scheme. By considering the deficiencies in previous works, new criteria and coding schemes for enhancing motion derivation and interpolation processes are suggested. We then integrate the proposed MCFI scheme into the decoding process of the latest coding standard, H.264/AVC. In addition, adaptive frame skip is fulfilled at the encoder side to maximize the power of MCFI in video coding applications. As a result, the encoder can adopt the MCFI dynamically and can decide whether the input frame should be coded or dropped then interpolated. Experimental results show that our proposal indeed enhances the overall quality, both subjectively and objectively, especially for the low bitrate video coding. Keywords: Frame Rate Up-Conversion, Motion Compensated Frame Interpolation, Adaptive Frame Skip. [ABSTRACT FROM AUTHOR]

Published
2005
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250. Flexible and Efficient Multi-Keyword Ranked Searchable Attribute-Based Encryption Schemes.

Author

Lin, Je-Kuan, Lin, Wun-Ting, and Wu, Ja-Ling

Subjects
*CLOUD computing, *DATA encryption, *SUPPLY chain management, *ARTIFICIAL intelligence, *CRYPTOGRAPHY
Abstract

Currently, cloud computing has become increasingly popular and thus, many people and institutions choose to put their data into the cloud instead of local environments. Given the massive amount of data and the fidelity of cloud servers, adequate security protection and efficient retrieval mechanisms for stored data have become critical problems. Attribute-based encryption brings the ability of fine-grained access control and can achieve a direct encrypted data search while being combined with searchable encryption algorithms. However, most existing schemes only support single-keyword or provide no ranking searching results, which could be inflexible and inefficient in satisfying the real world's actual needs. We propose a flexible multi-keyword ranked searchable attribute-based scheme using search trees to overcome the above-mentioned problems, allowing users to combine their fuzzy searching keywords with AND–OR logic gates. Moreover, our enhanced scheme not only improves its privacy protection but also goes a step further to apply a semantic search to boost the flexibility and the searching experience of users. With the proposed index-table method and the tree-based searching algorithm, we proved the efficiency and security of our schemes through a series of analyses and experiments. [ABSTRACT FROM AUTHOR]

Published
2023
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