Olympus IR-500 - Manual (Page 252)

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Glossary
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Glossary
Number of Pixels
Pixels are the smallest units which comprise a digital image. Images consisting of greater
numbers of pixels are more suitable for creating larger images.
Resolution (Image size)
This is the size of an image expressed by the number of points (pixels) comprising the image.
For example, when the computer monitor setting is set to 640 × 480, an image shot at a size of
640 × 480 will be displayed over the entire surface of the monitor. However, when the monitor
is set to 1024 × 768, the image will only fill a portion of the monitor area.
Digital ESP photometry
This is a method of photometry wherein CCD output is used to separately measure the light of
the surrounding and center areas in order to calculate the exposure. You can use this function
on this camera by selecting Auto in Photometry.
Exposure
Exposure refers to how the shutter opens to take in light, and the amount of light received by
the film or sensor so that a picture can be taken. The shutter speed adjusts how long the sensor
is kept exposed to light, and the aperture adjusts how wide the lens diaphragm is opened to
determine the amount of light allowed through the lens.
AE (Automatic Exposure)
This is a method which utilizes a built-in exposure meter to automatically determine the
exposure. Appropriate apertures and shutter speeds have been set for the 19 types of shooting
modes in this camera.
CCD (Charge Coupled Device)
This device employs a chip which with analog sensors to receive light entering through the
lens, which is then converted into electrical (digital) signals. The image is created when light
received by the CCD is converted into RGB signals.
00E Adam .book Page 252 Tuesday, November 9, 2004 3:24 PM