in face recognition camera Picture resolution video signal loss  image resolution image data format

The measurement of the clarity of the detail identification of a television image by the human eye is numerically equal to the number of television lines in the horizontal scanning direction of the display plane that can distinguish the most target image.


2.0.18 video data format


It refers to the representation method of digital video image, which is represented by pixel lattice sequence.


2.0.19 digital image compression for video


Taking advantage of the spatial, temporal and transform domain distribution characteristics of images, special algorithms are used to reduce the processing process of redundant data representing image information.


2.0.20 synchronization of video and audio


The motion information displayed by video is consistent with that of audio.


2.0.21 video check to alarm


When the alarm event occurs, the video monitoring system calls the function of the image related to the alarm area.


2.0.22 alarm linkage action with alarm


When an alarm event occurs, the relevant equipment other than the alarm device will act (such as alarm image review, lighting control, etc.).


2.0.23 video moving detection


Using video technology to detect the change of scene image, once it reaches the set threshold, it will send out alarm information


Alarm means.


2.0.24 video loss alarm

Code for engineering design of video security monitoring system (GB 50395-2007), when the peak value of the received video signal is less than the set threshold value (video signal loss), it can give alarm information.