Video OCR: Indexing digital news libraries by recognition of superimposed captions

Toshio Sato, Takeo Kanade, Ellen K. Hughes, Michael A. Smith, Shin'ichi Satoh

研究成果: Article査読

129 被引用数 (Scopus)

抄録

The automatic extraction and recognition of news captions and annotations can be of great help locating topics of interest in digital news video libraries. To achieve this goal, we present a technique, called Video OCR (Optical Character Reader), which detects, extracts, and reads text areas in digital video data. In this paper, we address problems, describe the method by which Video OCR operates, and suggest applications for its use in digital news archives. To solve two problems of character recognition for videos, low-resolution characters and extremely complex backgrounds, we apply an interpolation filter, multi-frame integration and character extraction filters. Character segmentation is performed by a recognition-based segmentation method, and intermediate character recognition results are used to improve the segmentation. We also include a method for locating text areas using text-like properties and the use of a language-based postprocessing technique to increase word recognition rates. The overall recognition results are satisfactory for use in news indexing. Performing Video OCR on news video and combining its results with other video understanding techniques will improve the overall understanding of the news video content.

本文言語English
ページ(範囲)385-395
ページ数11
ジャーナルMultimedia Systems
7
5
DOI
出版ステータスPublished - 1999 9
外部発表はい

ASJC Scopus subject areas

  • ソフトウェア
  • 情報システム
  • メディア記述
  • ハードウェアとアーキテクチャ
  • コンピュータ ネットワークおよび通信

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