When we want to find out the useful information
from the huge volume of video data, we can greatly
save the time spending in video retrieval, because we directly use the I frame as the key frame to retrieve.
What is more, it is because we use the key frame which
includes the most abundant information as the I frame
when we compress the video data that we can get the
clearest decompression image when we decompress
the video data. In addition, we can separately adjust the
compression ratio of the I, P and B frame, where the I
frame includes key information of the shot segment,
the B and the P frame include the redundant
information or moving information, then it’s easy to
obtain a good balance between high quality of image
and better compression ratio in lane surveillance
system.