A hardware feature?
In the past, multi-sampling was possible only with scanners that had this capability in their hardware. Many scanners never included this capability, so users were left in the dust when it came to scanning a high-noise image.

The ArtixScan 4000t is included on the list of scanners that do not have multiple-sampling hardware. SilverFast has now circumvented the lack thereof by including the feature in the software for this scanner.

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 image is averaged together.

Scan noise comes in random patterns. 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 change each time, SilverFast can differentiate the noise cancel it out if inconsistencies are present.

Clean Image

Noisy Image

Clean Image

Noisy Image