一般情况下，可以由相机来测定整个画面的光线亮度，并确定最佳曝光量。
In general, the camera to determine the whole picture of the radial brightness, and the optimum exposure.
在景物中设置标准灰阶标板和彩色靶标，其目的是为了确定正确的曝光量和正片印制。
The use of standard gray scale and color targets in the scene is required for correct camera exposure and positive printing.
在景物中设置标准灰阶标板和彩色靶标，其目的是为了确定正确的曝光量和正片印制。
The use of standard gray scale and color targets in the scene is required for correct camera exposure and positive printing.
应用推荐