In this paper, techniques for image text analysis are divided into three main blocks: image text extraction, image text preprocessing and image text recognition.
我们将图像文本分析技术划分为三大组成部分：图像文本定位、图像文本的预处理和图像文本的识别进行讨论。
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。
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