Film grain
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Film grain or film granularity is the random optical texture of processed photographic film. Film grain develops due to the presence of small particles of metallic silver, or dye clouds, developed fro
Photomicrograph of grain of different photographic plates
Film grain used for artistic effect
Rallycross car pictured on Agfa 1000 RS slide
Detail of the same photo to show the grain better
Image noise
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Image noise is random variation of brightness or color information in images. It can originate in film grain and in the unavoidable shot noise of an ideal photon detector. In digital photography is us
Film grain
…the same purpose also exist for various image editors such as Photoshop (e.g. in Nik Collection's Analog Efex and Silver Efex). In digital photography, image noise sometimes appears as a "grain-like" effect. Film grain overlay, sometimes referred to as "FGO", is a process in which film emulsion characteristics are…
Noise visible in an image from a digital camera
An image injected with periodic noise
Application of frequency domain notch filters
Image on the left has exposure time of >10 seconds in low light. The image on the right has adequate lighting and 0.1 second exposure.