Extend the Dynamic Range of your Scanner

Get rid of Noise! SilverFast Multi-Sampling with Auto-Alignment is here!
Ships with SilverFast SE Plus and SilverFast Ai Studio

The annoying noise?
Scanner noise comes in random patterns and is mostly visible in the very dark areas of the scan. This is where the CCD is getting very little light to work with, so the difference between the signal from image details and the background noise from the CCD and other analog components is too small, resulting in image noise. If the image is scanned only once (normal scanning), the noise will be imprinted on the scan. When scanning with multiple sampling, the same image is rescanned repetitively. Since the noise patterns randomly change each time, SilverFast can differentiate the noise, cancelling it out if inconsistencies are present.

Scanner noise is clearly visible	Scanner noise is eliminated

How does it work?

With multiple sampling turned on, SilverFast will perform either 4, 8, or even 16 scans during scan time. You can specify the count, usually the more the better. After performing the scans, the single images are averaged together into one image. Since noise is random, a special averaging procedure will cancel only the noise but leave the image details untouched. There is a problem associated with this process: Every scan might not exactly be in the same position with reference to each other, so normal averaging would blur the resultant Multisampling scan. That is why LaserSoft Imaging had to develop an intelligent auto-alignment, so no blurring effect can occur.