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Cashen Diverse Solutions - Glossary [J]

Jackets

These are cellophane holders of size nominally 148 mm x 104 mm into which strips of black and white film negatives are inserted. It appears similar to a fiche.

JPEG

Joint Photographic Experts Group.
The group that defines the file structure that uses the extension jpg e.g."myfile.jpg". It is used for greyscale and colour files and is based on a measure of 'lossy' compression. i.e. some data that can not be resolved by the human eye is lost during compression.
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