"Modern cameras use CCD arrays, which produce a field of data by sampling the light incident on a grid of sensors (throughout a certain exposure time) simultaneously. Therefore all of the pixels of a field are coincident: each pixel is a sampling of the light from a particular part the scene during the same, finite period of time.
Older tube-based cameras (which were distinguished by crusty old names like vidicon and plumbicon) would sample a scene by scanning through that scene in much the same way a video monitor scans across its tube. Therefore, in the fields created by such a camera, none of the data is coincident! Instead of capturing the crispy images like this...
...a tube camera would capture an image more like this:
Tube cameras are dinosaurs and are being replaced by CCD-based cameras everywhere. But it is still quite possible that you'd run into one or possibly even be asked to write software to deal with video data from one."
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Taken from http://www.lurkertech.com/lg/fields/ It looks like the bulk of the material was written in 1999 and last updated in 2008.
Older tube-based cameras (which were distinguished by crusty old names like vidicon and plumbicon) would sample a scene by scanning through that scene in much the same way a video monitor scans across its tube. Therefore, in the fields created by such a camera, none of the data is coincident! Instead of capturing the crispy images like this...
...a tube camera would capture an image more like this:
Tube cameras are dinosaurs and are being replaced by CCD-based cameras everywhere. But it is still quite possible that you'd run into one or possibly even be asked to write software to deal with video data from one."
---
Taken from http://www.lurkertech.com/lg/fields/ It looks like the bulk of the material was written in 1999 and last updated in 2008.