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US Patent on Multi-Exposure Technology

May 21st, 2014 · No Comments · News, Photography Business, SilverFast

Multi-Exposure is a technique for increasing a scanner’s Dynamic Range developed by LaserSoft Imaging. Now, the patent on this technology has also been granted in the Unites States. SilverFast Multi-Exposure® only with LaserSoft Imaging.
 
What is the Dynamic Range?
The Dynamic Range of a scanner, also referred to as density range or contrast range, is a measurement for a scanner’s capability to recognize contrast levels. Contrary to reflective originals like photo transparent originals (black & white film), color negatives and slides consist of multiple film layers, which respond to light differently. Therefore, transparent originals achieve a high Dynamic Range when captured, which usually exceeds a scanner’s capabilities. As a consequence, especially in the very light and shadow image areas, image details get lost when scanning.

How does Multi-Exposure increase the Dynamic Range?
SilverFast Multi-Exposure records an original’s maximum Dynamic Range by performing a double scan with an increased exposure time of the second scan. This procedure captures the light image area’s details in the first pass and the the shadow details in the second. Afterwards an algorithm calculates the final scan, which now contains any detail, from each single scan.

Learn more
about SilverFast Multi-Exposure
.

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