Environmental illumination


The physical quantity reflecting the light and shade of the target environment (within the visible spectrum range), which is equal to the luminous flux passing through the unit area vertically.


2.0.14 picture quality


It refers to the integrity of image information, including the integrity of original information recording and the integrity of continuous Association of image frames. It is usually described according to the following indicators: pixel composition, resolution, signal-to-noise ratio, and the original integrity of code for engineering design of video security monitoring system (GB 50395-2007).


2.0.15 original integrity

In this specification, it refers to the feature that image information and sound information keep the original scene characteristics, that is, no matter how the intermediate process is handled, the image and sound displayed / recorded / played back are consistent with the original scene, that is, color restoration, gray level reduction, scene target image contour reduction (gray level), event sequence, sound characteristics, etc The degree to which the scene maintains the maximum similarity (subjective evaluation).