景象提取的目的是将数字图像中的景物从背景中分离出来。
The purpose of image drawing is to extract objects of interest from background in a digital image.
最后一种方法是交互分割法，它依赖人工输入来指定所要分割的感兴趣目标，将图像目标从背景中分离出来。
The last is an interactive method separating objects of interest from the background by the user's input specifying the object of interest manually.
图像分割就是根据目标和背景的先验知识对图像中的目标背景进行标记，然后将要识别的目标从背景中分离出来的一个过程。
Image segmentation is a process of separating the target contour after marking the objects of the background according to the prior knowledge.
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