随着现代社会的发展，信息的形式和数量正在迅猛增长。其中很大一部分是图像，图像可以把事物生动地呈现在我们面前，让我们更直观地接受信息。同时，计算机已经作为一种人们普遍使用的工具为人们的生产生活服务。从图像中提取文字属于信息智能化处理的前沿课题，是当前人工智能与模式识别领域中的研究热点。由于文字具有高级语义特征，对图片内容的理解、索引、检索具有重要作用，因此，研究图片文字提取具有重要的实际意义。又由于静态图像文字提取是动态图像文字提取的基础，故着重介绍了静态图像文字提取技术。(With the development of modern society, the form and quantity of information are growing rapidly. Which is a large part of the image, the image can be vividly presented in front of us, let us more intuitive to accept the information. At the same time, the computer has served as a popular tool for people's production and life services. Extracting the text from the image belongs to the forefront of information intelligent processing, which is the research hotspot in the field of artificial intelligence and pattern recognition. Because the text has high semantic features, it has important effect on the understanding, index and retrieval of picture content. Therefore, it is of great practical significance to study the extraction of picture text. And because the static image text extraction is the basis of dynamic image extraction, it emphasizes the static image text extraction technology.)