This way the exposure can always be decreased afterwards — while still maintaining minimal image noise because more light was collected at the digital sensor.
这样的话，可以通过后期处理减弱曝光度，同时因为相机感光较多，可以把噪点限制到最少。
2
The image was recorded with a digitalstill camera. (NASA)
图片由数码照相机拍摄。
3
By stillimage compression coding technique, the color digital watermark is encoded into a series of binary ID Numbers for watermarking.