In a reference counting system, each object referenced maintains a count of how many objects are referencing it.

在引用计数系统，每个所引用的对象都会保留一个计数，以获悉有多少对象正在引用它。

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Reference counting involves keeping a count of how many references to a given object are extant, then deleting the object automatically after the last one is released.

引用计数(reference counting)是对一个给定的对象当前有多少指向它的引用保留有一个计数，然后当最后一个引用被释放时自动删除该对象。

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Object recognition and counting according to image is a research direction in the field of image processing and recognition.

根据图像对已知物体的识别和计数是图像处理和识别领域的一个研究方向。

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