Game Development Reference
In-Depth Information
Fig. 10.5 a
The conceptual schema of the standard syntax in IEEE 1857 surveillance groups spe-
cially designed for video analysis and recognition tasks;
b
An example of the syntax for describing
ROIs in the code stream;
c
A pipeline to demonstrate how to utilize ROIs extracted from the code
stream in various video analysis tasks
surveillance groups can effectively avoid the dilemma between high video com-
pression ratios and high recognition accuracy both required for surveillance video
systems. Given G-pictures in the coded stream, we can utilize an adaptive threshold
to divide the MBs in the current frame into foreground units (FUs), foreground-
background-hybrid units (HUs) and background units (BUs), where different kinds
of units often correspond to different proportions of foreground. This MB classifica-
tion can be used to improve the performance of object detection in both processing
speed and accuracy.
By exploiting model-based coding to remove the scenic redundancy, IEEE 1857
surveillance groups can achieve remarkably twice coding efficiency on surveillance
videos over AVC/H.264 HP. More importantly, they should be the most recognition-
friendly video coding standard till now, by enhancing standard syntax for describing
ROI regions and camera parameters and offering some powerful techniques to support
video analysis and recognition. It is an efficient intelligent video coding system.
