However, traditional Search Engine adopts full-text retrieval technique based on keyword match, and it results in having no all-sided retrieval result and more outlying information.
然而由于传统的搜索引擎基本上都是采用基于关键词匹配的全文检索技术，导致检索结果不全、无关信息过多。
Text extraction is a key technique in content-based video retrieval as textual information plays an important role in describing the content of image.
文字信息在描述图象内容时起着重要的作用，因此文字提取及识别是基于内容视频检索的关键技术。
The text information retrieval visualization based on knowledge models is the visualized retrieval with metadata information of information resources.
基于知识模型的文本信息检索可视化，是利用信息资源的元数据信息来进行可视化检索。
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