The distance the wall could be seen depends on the angular resolution of the imaging system (the eye) and the contrast of the wall vs. background.

能看清长城的最远距离取决于成像系统(眼睛)的角度分辨率以及长城与它周围环境的对比度。

youdao

The images are often then polished up in Photoshop, or some digital imaging package, but only the background and shadows are manipulated, the actual fluid shape is left untouched.

这些照片通常要通过Photoshop或其他的数码图像处理工具加以改善，但是这种修饰仅限于背景和阴影，流动的形态是不做任何加工的。

youdao

Background: There is no consensus on the optimum imaging method to use to confirm the diagnosis of true scaphoid fractures among patients with suspected scaphoid fractures.

背景：在用以证实可疑舟状骨骨折患者准确诊断的最佳影像学方法上未达成一致意见。

youdao

With a background in digital imaging, Sareen set out to make an inexpensive body scanner that could utilize Tukatech's technology to better serve the clothes-buying public.

ENGADGET: Kinect Accelerator company profiles: Freak'n Genius, GestSure Technologies, Kimetric and Styku

Just as grain size in silver halide film ultimately limits the amount of detail you can see in a photograph, the background noise produced by the sensor does much the same in digital imaging.

ECONOMIST: A die-hard analog photographer goes digital