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.
不仅仅是清晰的问题，重要的是它使你可以从画面中得到足够的信息，从而产生对比；你可以将前景的重要物体从背景中分离出来。
To be not only sharp, but to reveal enough information there so that you can have contrast; to be able to distinguish backgrounds from foregrounds from objects was crucial.
下图是从背景恒星中分离出来的彗星图像。
To see the comet separate from the background stars, just slide your cursor over the image.
人脸检测是人脸识别过程中的必要前期工作，其主要作用是将人脸部分从背景图像中分离出来。
Face detection is the necessary earlier task in face recognition process, aiming at separating the face area from the background image.
大部分已知的脉冲星只能通过对它们的信号进行' ' '积分' ' '才能找到：对大量的脉冲进行叠加，使得真实的信号可以从背景噪声中分离出来。
Most known pulsars were only found by "integrating" their signal: superposing a large number of pulses in a coordinated way to make the actual "pulse" signal stand out from the "static".
大部分已知的脉冲星只能通过对它们的信号进行' ' '积分' ' '才能找到：对大量的脉冲进行叠加，使得真实的信号可以从背景噪声中分离出来。
Most known pulsars were only found by "integrating" their signal: superposing a large number of pulses in a coordinated way to make the actual "pulse" signal stand out from the "static".
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