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Pixel mapping. Can you discuss what that is and when it might be necessary.

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CUSA Comment: "Pixel Mapping" is a diagnostic software program used by the Canon Factory Service Center to identify dead pixels in an imager and essentially replace their data with good information from adjacent "live" pixels. There's nothing new or unusual or exclusive to Canon about this procedure. Virtually all imagers used in digital cameras today have some degree of dead pixels present when they are manufactured. Mapping out the dead pixels is something that occurs initially at the factory when the camera is assembled as a part of the quality checking procedure. However, even though all dead pixels present at the time of camera assembly are mapped out at the factory, more can appear at a later date for a variety of reasons. When this happens, the Service Dept. can step in and remedy the problem. This service is typically offered at no charge while the camera is in warranty.

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