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Edge detection has decreased data amount by a large margin, got rid of the irrelevant information, reserved the important structure attribute of image, and established a basis for future work.
图像的边缘检测大幅度地减少了数据量，并且剔除了不相关的信息，保留住了图像中重要的结构属性，为后续的图像处理工作奠定了基础。
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