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Originally Posted by RGClark
Analog video cameras have separate pixels for R,G,B arranged in triplets so they are all exposed at the same time.
Are you sure digital video cameras take separate filter images and then combine them?
Bob Clark
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I guess I could try to answer this... It really depends, some cameras(digital and analog) uses three separate image sensors, each with its own filter. another approach is to use a single imager, but moving filters, this is similar to the system used on the rovers. The most common in digital cameras though, is to create the sensor with a RGBG filter(some use CMYG, but it is the same principle), that is, coating the surface of the sensor with filter pigments like this:
RGRGRGRG
GBGBGBGB
RGRGRGRG
GBGBGBGB
There are many different ways of doing something of course, you could make a camera that used one imager to create the brightness channel, and another to create a red-blue color map, and combine them to make RGB images. The RGB image tubes used in some cameras was likely to be something like a reversed CRT screen, with three different electron beams scanning the light sensitive surface through a shadow mask.
But no matter how you filter the light, you will have a few images that must be combined, encoded and stored on medium, though not necessarily in that order.