The Scanning Process
These are the processing steps that occur in scanning film in a CCD film scanner such as the Nikon LS-2000. The scanner operator can affect results by specifying the LED brightness, the bits/channel, and the tone curve.
|LED Brightness||More light images more shadow detail. Continuous value space||Globally affects tonal values. Can aggravate CCD flare. Preview image may have to be regenerated for each new setting|
|Bits/channel||Enables greater precision through smaller intervals. 12 bits enables 16x precision||Increase from 8 bits doubles file size. Image application (e.g. Photoshop) functionality may be restricted|
|Tone curve||Greatest flexibility. Can globally or locally shape tonal curves.||Works in more restricted digital domain. Note however that with NikonScan 3 curves are applied prior to downsampling, enabling the user to obtain an 8-bit file with a full range of intensities|
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