Hi, how can i define subject contrast and film contrast.And what is Film gradient?
Object contrast (Subject Contrast):The relative difference of radiation transmitted between two regions of an irradiated object.
Visual contrast (Film Contrast):A density difference perceived visually between two adjacent areas when viewing a radiograph.
These definitions were found in the A-Z Section of this site http://www.ndt.net/ndtaz/ndtaz.php
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