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.

youdao

为了使景深获得较好的效果，我将特写镜头(镜头1 - 3)图片分离开来置于前景和背景图片中。

So I split the images of the close-ups (cameras 1-3) into foreground and background images to get better results when computing the depth of field.

youdao

为了使景深获得较好的效果，我将特写镜头(镜头1 - 3)图片分离开来置于前景和背景图片中。

So I split the images of the close-ups (cameras 1-3) into foreground and background images to get better results when computing the depth of field.

youdao