Selecting focus Windows is one of the key problems in realizing autofocus in digital cameras.

对焦窗口的选择是数码相机进行自动对焦的关键问题之一。

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Such as how to select focus functions and focus Windows, how to perform feedback control, and how to improve the auto-focusing velocity etc., are far from completely solved.

在如何选择对焦评价函数和对焦区域、如何进行反馈控制和如何提高对焦速度等方面，还有诸多问题有待解决。

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Such as how to select focus functions and focus Windows, how to perform feedback control, and how to improve the auto-focusing velocity etc., are far from completely solved.

在如何选择对焦评价函数和对焦区域、如何进行反馈控制和如何提高对焦速度等方面，还有诸多问题有待解决。

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