该方法将指纹图像的背景分为两层：外层黑色背景区域和内层浅色背景区域。

The method divides the background of fingerprint image into two layers: outboard black area and inboard tint area.

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此外，“好”的照片看上去非常相似，参数可能设置得有点狭隘了(当然一些好的画具有浅色背景)。

Additionally, the "good" photos all look quite similar, the parameters perhaps being set a bit narrowly (surely some good portraits have light backgrounds?).

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在光线明亮的房间里，深色背景和浅色文本搭配的屏幕图像容易泛光，但是浅色背景搭配深色文本的视觉效果就好得多。

In rooms with a good deal of ambient light, a screen image with a dark background and light text tends to washout, but dark text on a light background will maintain its visual intensity a bit better.

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