目的在图像工程中，图像增强方法有多种，如增强对比度和动态范围压缩等等。

Objective There are many image enhance methods in image engineering, for example contrast enhancement and dynamic range compression and so on.

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此方法既扩大了图象灰度的动态范围，又使得图象中的局部对比度得到了增强。

A new contrast enhancement technique is presented, which can not only extend the dynamic scope of the image gray scale, but also increase the local image contrast.

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