Is there any difference between the dust and scratch correction procedure ICE and iSRD?
On our website about different Correction Procedures, the automatic dust and scratches remover ICE is described in detail. It is about a very reliable method that was already developed in the beginning of the millenium and that has been implemented into many scanners. In some scanners, there is no ICE but iSRD in the SilverFast-software, although the scanners are actually delivered with ICE. Where is the difference? Both procedures are based on the hardware; they use the infrared ray of the scanner in order to detect the mountains and valleys on a slide or a negative. Thereby, the mountains correspond to dust grains and valleys to scratches. Once the dust grains and scratches are detected, the intelligent algorithms can correct those spots on the image based on the image information around them. This is why it is called automatic dust and scratches removal. Both proceedings only work if the scanner has, beside the CCD sensor, additionally an infrared sensor that scans the image surface
