Wednesday, 25 July 2012

Understanding Digital Camera Sensors

If you wish to learn about your digital camera's sensor, this article from Cambridge in Colour is extremely informative:

A digital camera uses a sensor array of millions of tiny pixels in order to produce the final image. When you press your camera's shutter button and the exposure begins, each of these pixels has a "photosite" which is uncovered to collect and store photons in a cavity. Once the exposure finishes, the camera closes each of these photosites, and then tries to assess how many photons fell into each. The relative quantity of photons in each cavity are then sorted into various intensity levels, whose precision is determined by bit depth (0 - 255 for an 8-bit image).

To read the full article, follow the link:

Understanding Digital Camera Sensors

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