Scratches and dirt
If film was frequently used, not treaded with best care or run on not well maintained equipment, it might be scratched and dusty from abrasions. The optional IR camera allows Scanity to ‘see‘ the scratches and dirt and generate a dirt matte. This dirt image can be put in the DPX file within the alpha channel in addition to the RGB channels. Furthermore the internal processing can correct for small scratches and dirt during scanning, on the fly, without slowing down the scanning speed.