Granularity
Objective term describing the amount that silver halide grains have clumped together within the emulsion.
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More Photographic Terms ...
GRANULARITY - Describes a negative or film that shows a granulated structure, usually used to describe the degree of granularity that is visible.
The GRAY CARD is a simple but effective aid in determining proper exposure.
granularity
non-uniformity of photosensitive film emulsion, causing light scatter.
granularity:
An image fill that gradually transitions from one color to another; commonly used in graphics editors.
grayscale: ...
(AKA granularity) is the unwanted random optical texture
Gradient tool
Fills a closed object with a range of colors that fade into each other.
At 16x20 modern LF lenses have a slight edge due to reduced granularity and high contrast, above that, modern 4x5 wins due to granularity. However, you will see a bigger difference with format for B&W prints than with color prints.
Both professional and amateur films have similar color quality, sharpness, and granularity characteristics. Also, they have emulsions made up of many different chemicals that tend to change slowly with time.
The techniques involved in compression may result in loss of actual data, which may result in irregular rasterization of an image or granularity.
Film speed is roughly related to granularity, the size of the grains of silver halide in the emulsion, since larger grains give film a greater sensitivity to light.
With low light levels indoors, photos taken with both types of cameras can be susceptible to granularity or artifacts, however most users don't notice the effects - and many software applications exist that can reduce the artifacts, ...
Film speed is also related to the granularity of the resulting photograph. Portrait photographers and those looking for more detailed pictures tend to use "slow film" (film with slower film speeds) that require more light and decreased shutter speeds.
The picture below illustrates an exaggerated granularity (created using computer editing software and not with the use of high ISO level in a camera)
How to determine the suitable ISO level for your camera ...
Video is smooth, and with the exception of of a very slight granularity in shadows, output is very clean. One of the benefits of the AVCHD Lite format over the more standard Motion JPEG is that more video can be stored per megabyte of memory.
Since a pixel is the smallest level of granularity, its color will be uniform, and its value will be some 24 (or 32) bit number that can be painted into as large an area as required with no loss of fidelity.
Graininess becomes more noticeable with fast films and increased size of enlargement.(Granularity: The amount of grain clumping that has occurred within an emulsion. Also referred to as graininess.)
(see Emulsion, Enlargement & Fast film,) ...
Artifacts: Unwanted effects in the image such as blotches (from over-compression), Christmas tree lights (multi-colored speckles from bright highlights), noise (granularity from underexposure) and other aberrations that sometimes afflict digicam ...
SilverFast DC VLT 6.4.4: Again an OK job but less effective than most of the other RAW converter's basic noise reduction tools. Removal of granularity is about average or slightly better ...
I do believe searchable keywords can be incredibly valuable, but I feel that keywords on any finer level of granularity (or subjectivity) probably belong in your working catalog or in XMP metadata, or both.
 See also: Image, Light, Photograph, Camera, Print
  
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