Why Video Analysis?
Many industries use video on a daily basis: security, law enforcement, military,
surveillance, and even retail sales. The average person is captured on video
eight times a day. However, to derive full benefit from this video information,
organizations often need to employ video analysis systems that can augment unclear,
distorted, or otherwise illegible video information and help track subjects
in hours of footage.
Video analysis can stabilize jittery video. It stabilizes video from unsteady
cameras, like those dash-mounted in police cars or surveillance cameras affected
by strong wind. Once shakey video is stabilized, you can more effectively add
additional enhancement tools for greater image clarity. As an example Video
Analysis was used by the FBI during 1996 Summer Olympic Games to enhance a crime
scene video recorded in near total darkness.
Jittery video image taken of a moving vehicle from a moving vehicle
Stabilized video image
Most video data is interlaced, first displaying half of the image (the odd
field) top to bottom, and then displaying the other half (the even field), overlaying
but offsetting the image faster than the eye can see. Many times, these two
scans of the image can make it appear blurry. These fields can be converted
to frames by using a deinterlace tool. Once converted to frames, other Video
Analyst tools can be used to further enhance the image.
Deinterlacing allows the user to separate those fields into individual frames
that are much clearer and easier to enhance.
Interlaced image appears blurry
Deinterlaced image with one of the fields removed and the other converted
to a viewable frame