Automated Key-frame Detection on MPEG Format Lecture Video
碩士 === 國立臺灣師範大學 === 資訊教育學系 === 94 === Key-frame extraction is an important pre-process step before video indexing and retrieval. For lecture videos, key-frames are defined to be those involving slide-changing frames. This thesis proposes an efficient algorithm for automatic slide-change detection...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2006
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/47854321726197994455 |
| Summary: | 碩士 === 國立臺灣師範大學 === 資訊教育學系 === 94 === Key-frame extraction is an important pre-process step before video indexing and retrieval. For lecture videos, key-frames are defined to be those involving slide-changing frames. This thesis proposes an efficient algorithm for automatic slide-change detection of MPEG format lectures videos. The proposed algorithm is based on analyzing the regional differences of the dc-values of the Y-channel of I-frames of the MPEG compressed video. Experimental results show that the proposed algorithm is fast and effective in detecting slide-changing frames while suppressing those involving intensity changes due to non-slide-changing activities.
|
|---|