Article Abstracts | June 2007
The complete article appears in the June 2007 issue of Photonics Spectra. If you do not have a copy of this issue,
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Interlaced Goes Digital
Interlaced sensors in FireWire cameras aid applications such as ophthalmology.
by Michael Cyros, Allied Vision Technologies Inc.
Although industrial digital cameras for the machine vision market were introduced nearly 20 years ago, about 65 percent of all camera units sold in North America are still analog, according to the Automated Imaging Association. The main reason is that, whereas most new system designs are based on digital cameras, updating legacy systems based on analog technology has proved difficult for many industrial users.
The problem is that the majority of analog cameras operating in older machine vision systems use standard interlaced video formats, while most digital camera manufacturers use newer progressive-scan sensors for their product offerings. This makes it difficult to migrate for two reasons: Progressive-scan cameras are hardly compatible with interlaced-based systems, and some users do not want a progressive-scan sensor at all...
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