Appendixes 123GlossaryNoiseMisinterpreted pixels in a digital image that may appear asmisplaced or random, bright pixels. Noise usually occurs whenphotos are shot with a high sensitivity or when a sensitivity isautomatically set in a dark place.Optical zoomThis is a general zoom which can enlarge images with a lens anddoes not deteriorate quality of images.QualityAn expression of the rate of compression used in a digital image.Higher quality images have a lower rate of compression, whichusually results in a larger file size.ResolutionThe number of pixels present in a digital image. High resolutionimages contain more pixels and typically show more detail thanlow resolution images.JPEG (Joint Photographic Experts Group)A lossy method of compression for digital images. JPEG imagesare compressed to reduce their overall file size with minimaldeterioration of the image resolution.LCD (Liquid Crystal Display)A visual display commonly used in consumer electronics. Thisdisplay needs a separate backlight, such as CCFL or LED, toreproduce colors.MacroThis feature allows you to capture close-up photos of very smallobjects. When using the macro feature, the camera can maintaina sharp focus on small objects at a near life-size ratio (1:1).MeteringThe metering refers to the way in which the camera measures thequantity of light to set the exposure.MJPEG (Motion JPEG)A video format which is compressed as a JPEG image.
