Creation of a foreground image with The gimp.

用Gimp创建前景图像。

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Choose a foreground image size that is a larger multiple of your movie image tile size.

选择一个比您的影片图像贴片大几倍的前景图像。

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Remember, any white pixels you put in your foreground image will provide a mask over the background frames.

记住，在您的前景图像中所使用的任何白色像素将提供背景帧的蒙版。

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With the flash on, the camera automatically merges an image of the subject illuminated with the flash in the foreground with a separate image of the background nightscape, to produce a single, clear night photo.

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