Pixel Mapping
The more pixels your camera’s imaging sensor (CCD) is made of, the more
likely some of them may fail. Think of the lights on a Christmas tree.
When the string is smaller, the lights usually fire without incident.
But the longer the set of lights, the higher the probability one or
more individual lights will need repair. These “stuck,” “dead,” or
“hot” pixels, as they are often called, can cause the quality of your
images to be compromised. Nearly every digital camera, regardless of
the manufacturer, includes a sensor that experiences this to some
degree. The issue may not be severe enough to be noticed, but if you do
notice this phenomenon to occur, look into Pixel Mapping.
Some digital cameras come with an Automatic Pixel Mapping
function right inside the camera that helps prevent faulty pixels from
affecting image quality. The feature can be manually selected from the
camera’s menu and takes approx. 10-30 seconds to complete, depending on
the camera model. By doing so, the location of the faulty pixels will
be determined and stored to memory so the camera will automatically
compensate for the missing information or incorrect data in subsequent
exposures. It is recommended that this function be used at least once a
year and if so, your camera should enjoy a much longer period of
high-performance.
Check your digital camera's instruction manual to see if the Pixel
Mapping feature is included. If not, you may be able to send it in to
an authorized Olympus factory service center to have it done. Either
way, your camera and the pictures you take using it will be better for
it in both the short and the long run.