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iSRD® - Infrared Dust and Scratch Removal
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Slides and negatives always have small dust particles and tiny scratches on them, even when handled very carefully. Removing them one-by-one takes a tremendous amount of time, since often hundreds or thousands of small defects (dust grains or lint) are found on the original image, which only become visible after digitization. LaserSoft Imaging has developed a reliable solution to this problem.
Contrary to conventional techniques SilverFast‘s dust and scratch removal functionality iSRD® is based on the hardware.* It is using the scanner‘s infrared channel for defect detection. Infrared light has a very wide wave-length, which allows it to pass through film emulsion of negatives and slides without resistance, as opposed to scratches and dust particles that reflect it. iSRD utilizes this behavior as follows. The image is scanned two times - the first is the regular RGB scan and the second is the additional infrared scan that captures defects like dust and scratches only. Then the calculative dust and scratch removal takes effect, only where the infrared channel has detected any defects without losing any important details. SilverFast iSRD in SilverFast SE 8 & SE Plus 8 In SilverFast SE 8 and SE Plus 8, iSRD is especially easy to use and reliable. You may entirely trust in the automatic mode or manually regulate the sensitivity of defect detection using a slider control. In 1:1 preview mode, the results can be pre-evaluated in detail.
SilverFast iSRD in SilverFast Ai Studio 8 The expert mode (only in Ai Studio, HDR Studio and the Archive Suite) offers additional functionality, which helps to mark the defects to be corrected. The Eraser Tool is used to specify image areas, where no correction should be applied at all.
SilverFast iSRD and SilverFast SRDx ![]() ![]() SilverFast iSRD & Kodachrome ![]() … until LaserSoft Imaging had developed a set of Kodachrome features allowing a great variety of scanners to handle Kodachromes. ICC profiles, a special Kodachrome target for IT8 color calibration and, of course, iSRD in combination with SRDx enable SilverFast to scan Kodachromes reliably without color casts and free of dust and scratches. * Note: The iSRD feature needs information from the infrared channel of the scanner, so please make sure your scanner supports iSRD. |
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See how effectively SilverFast iSRD® and HDRi work:
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Desktop Dialog 10/11 2011
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LandSpeed Louise
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