Enhancement Tools
Enhancement tools provide the ability to enlarge and modify single images selected from the database.
Enhancement tools aren’t perfect. You can’t create information. You can only enlarge and modify the
existing information. JPEG is great for compressing images, allowing more video to fit in a smaller space.
Because of the compression methods used, there is a limit to the amount of enhancement that can be done.
Yet you can convince yourself of the usefulness and effectiveness of the Intellex enhancement tools by
performing the following exercise:
Connect a camera to the Intellex. Take two one hundred dollar bills out of your wallet (singles will
do, too). Hold one up close to the camera. Hold the other further away. Play back the video clip
and select an appropriate image to enhance. You should be looking at one bill filling about 25% of
the image and the other covering five percent or so. Put the cursor over the larger of Ben’s (or
George’s) noses and select Zoom In. Do this a couple of times and bask in the results. Return to
full size and select the smaller nose. Repeat the Zoom In exercise. What did you learn? The big
nose was better! Not because it is bigger but because it has more pixels to work with and you
don’t have to enhance it as much as you do with the smaller image to see what you need to see.
Q. What is the best way to enhance a video image?
A. This is an instance where the basics are more important than the electronics. Select the right camera
position and lens to capture what you are looking for. Keep the main focus of the picture in the 25% center
portion of the image. Don’t depend on the enhancement tools to compensate for a single camera with a
wide-angle lens that is covering a shopping center parking lot. If you can barely identify the make of an
automobile in a full size shot, you won’t be able to enlarge the license plate enough to read it.
That being said, Intellex enhancement tools are as good or better than any used in general security
applications. With a slight enlargement, adjustment of brightness and contrast, and other minor
adjustments, you can get a clearer view of the image.
Q. Why can I get a more effective enhancement of a photograph using an inexpensive scanner and software
on my PC than I can get with Intellex?
A. The quality of the enhanced image is primarily dependent on the quality of the original image. That
scanned photograph is saved as a bit map file. Most bit-mapped images are in the 900K+ size range. The
largest key frame on Intellex is 64K, with most in the 12-24K range. Delta images (see JPEG) are in the 2-
8K range. The enlarged bit map still has considerable detail. The JPEG image has less detail.
Q. So, why not use all bit map images on Intellex?
A. At about one MG per image, that’s 1,000 images per GB. At a record rate of 120 images per second,
that’s about 8 seconds of recording per GB. Our method is closer to an hour per GB. If we were to use all
bit map images, our 120 GB system would be about a 15-minute recorder.
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