#video capture hardware
10-Feb-95 11:21:58
Sb: #2804-#video capture hardware
Fm: Douglas Fifield 73172,1707
To: Ben Ferguson 75600,3531
Ben,
We use still-video cameras to photograph manufacturing and assembly processes
and then grab them using either Targa+ 16/32 cards or a Canon capture card. We
use Sony Mavica 2000's and Canon RC570's as cameras.
The Targa+ 16/32 was priced around $2000 new, but it is older technology now
and you may find used ones on the market in your price range. The Targa and
the Canon both capture 2 fields per frame (assuming you are shooting in the
high resolution mode – 25 photo's per disk). Other capture cards we have
looked at grab only one field at a time, resulting in a lower quality image.
What you see when you view the image from the camera diskette may have
something to do with the discrepancy in image quality as well. If you view the
image from the diskette on a regular TV, you are seeing an analog signal sent
to the TV in NTSC mode. When you capture that image and digitize it with the
ComputerEyes/RT video digitizer, you see an image that may have lost data in
the process. It depends on how many fields are captured, how much color, what
format the digitized file is stored in, the resolution of your computer
monitor, what resolution and color depth you have set for your Windows
environment (if you are running Windoze). There are a lot of variables.
Drop me a line if you have further questions.
Douglas Fifield Tennant Company Minneapolis, MN with OzWin 1.10