The detect ability of space object visible camera is related to the target signals collection capabilities, camera background noise and focal plane array assembly noise.

空间目标可见光相机的探测能力主要与相机自身收集目标信号的能力、相机本身的背景噪声以及探测器组件的噪声水平有关。

youdao

Point the camera at a white background, and observe this phenomenon with a magnifying glass.

将相机对准白色背景，然后用放大镜观察这种现象。

youdao

The opacity can depend on the distance to the camera, meaning that the images in the background can be a little transparent to give the feeling of depth.

不透明度可以根据离摄像机的远近来确定，也就说，背景中的图形要更加不透明一些，给人以纵深感。

youdao

Plenty of measures can tell you something about the user's state of mind: keystrokes, how many windows are open and their content, whether the user is scrolling, the time of day, the contents of a desktop calendar even background noises from a microphone and visual information from a camera.

ECONOMIST: Computing

In her white-washed office set against a pulsating Times Square background, Wintour sat sipping a lipstick-stained Starbucks and sneaking emails before the camera was on.

FORBES: Vogue's Anna Wintour: Intimidating, No. Powerful, Yes.

The lens' wide F2 maximum, 9-bladed circular aperture enable beautiful background defocus ('bokeh') effects to rival or exceed professional-class DSLR camera lenses.

ENGADGET: Sony's Cyber-shot RX1 compact camera packs a full-frame sensor, 'fits in your palm' (hands-on)