Noise

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Noise is a problem in digital camera sensors and in most parts of analogue (electronic) cameras. Noise most commonly appears as either random coloured dots sprinkled around the image, or uneven colouration of what should be smoothly-coloured areas.

Noise reduction software is often employed by digital cameras to reduce the appearance of noise in an image. As CPUs have become faster, more sophisticated noise reduction is able to be viably employed, allowing camera firmwares' software to correct for the technical deficiencies of increasingly noisy photographic sensors.