Security Systems
There are advantages to both of the different CCD scanning modes: progressive and interlaced. From a video security point of view, the advantages of progressive scan CCDs are that a higher vertical resolution can be attained and less image blur occurs when capturing moving objects. However, interlaced scan CCDs inherently provide higher sensitivity.
As you may already know, when using an interlaced scan CCD for network video monitoring, a technique called I/P (Interlace/Progressive) conversion is required to produce a single frame of video. Basically, with this technique, image data is buffered in memory until a single frame of data is ready to be output.
When performing IP conversion, Sony incorporates a technology called Dynamic Frame Integration (DFI) in some of its interlaced scan CCD network cameras so that both moving objects and still objects are clearly reproduced while taking advantage of the relatively high sensitivity inherent in interlaced scanning CCDs.
Benefit of Dynamic Frame Integration
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