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Line 16: === Noise reduction === [[Image noise\|Noise]] is a phenomenon found in any [[Electronic circuit\|electronic circuitry]]. In [[digital photography]] its effect is often visible as random spots of obviously wrong ~~colour~~color in an otherwise smoothly-coloured area. Noise increases with temperature and exposure times. When higher [[ISO 5800:1987#Digital camera ISO speed and exposure index\|ISO]] settings are chosen the electronic signal in the image sensor is amplified, which at the same time increases the noise level, leading to a lower [[signal-to-noise ratio]]. The image processor attempts to separate the noise from the image information and to remove it. This can be quite a challenge, as the image may contain areas with fine textures which, if treated as noise, may lose some of their definition. === Image sharpening ===

Image processor: Difference between revisions