Visualization refers to the theory, method and technology of using computer graphics and image processing technology to transform data into graphics or images and display them on the screen, and carry out interactive processing. According to statistics, 70% - 80% of information is obtained by vision, 20% by hearing and 10% by touch. The advantages of using image instead of text to help people retrieve are: the expression of image is more vivid, the ending image, the standard, the efficiency is higher, with the characteristics of interactivity, multi-dimensional, visualization, etc., which can greatly speed up the retrieval speed and make the massive data generated at all times be effectively used.<br>
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