Light and dark areas within an image provide contrast that can suggest volume.

一个图像的明暗区域形成对比，这种对比使图像具有体积感。

youdao

So pick an image with simpler patterns, and lots of contrasting light and dark areas.

所以你可以选择模式简单，但是有较多明暗对比区域的图片。

youdao

When you increase Amplitude, the light areas get lighter and the dark areas get darker.

当你增加振幅，发光体区域得到发光器并且暗区得到黑色。

youdao

Scientists measure solar activity by counting dark areas on the sun's surface.

VOA: special.2009.09.29

But if you look at 1860, the bottom map, if you can vaguely see those deep, dark, red areas, you can see where cotton moved, where slavery moved in the domestic slave trade, and then where Southern political power moved.

看看1860年,就在地图的最底部,如果你们能看到这些深红色的区域,你们就能明白棉花种植地的扩大,是如何导致奴隶需求量扩大的,同样变化的还有南方政权力量

耶鲁公开课 - 美国内战与重建课程节选

Until now, there have been limitations as to how far LEDs can be spaced apart at the edge of an LCD panel because of dark areas that appear between LEDs when they are too far apart.

ENGADGET: 3M Uniformity Tape improves lighting quality on LED edge-lit LCDs, lowers production costs

The LABB algorithm also operates on a frame-by-frame basis by identifying "dark areas" and "bright areas" within a frame, then adding a programmable amount of gain to the dark areas, resulting in a more realistic and viewable image.

ENGADGET: DLP's IntelliBright tech promises brighter pico projection at no extra power

With SSDR, the HD cameras and automatically increase the brightness of the dark areas of the image without affecting the rest of the image, while SSNR III drastically reduces image noise to provide impressive color in low-light conditions.

ENGADGET: Samsung Techwin announces two new HD CCTV systems for the security conscious resolution snob