There are three methods of capturing an image; the sensor, the hardware configuration, and the color filters are the bases for each of them. Each is used for a different type of photography.
* The Single-Shot Method: This refers to the number of times the sensor is exposed to light passing through the lens. These use either one CCD with a Bayer filter mosaic, or three separate image sensors, one each for red, green, and blue; each are exposed, via a beam splitter, to the image. This is the preferred method for taking action photos.
* Scanning: This moves the sensor across the focal plane like a desktop scanner. One of the preferred methods for commercial photography because it allows use of larger files and the resolution is better.
* Multishot: Here the sensor is exposed to the image with three or more openings of the lens aperture. This is another of the methods preferred by professionals for shooting still photos and for using large-format images.
o Using a single image sensor with three filters
o A single CCD with a Bayer filter which moves the location of the sensor
o A combination of the two with no Bayer filter
The subject matter will have a lot to do with the method used to take the picture; normally a moving subject should only be captured by a single-shot system.
Commercial photographers shooting stationary subjects and using large-format photographs prefer the higher fidelity, large file sizes, and resolution available with multi-shot and scanning backs.
Single-shot cameras have improved so much in recent years and, with RAW image file processing, have made CCD-based cameras prominent in commercial photography. In addition, these improvements have also affected the whole of digital photography. Another more common camera is the single-shot CMOS-based camera.
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