SilverFast Ai and HDR have the unique capability to scan / save images fully optimised, color-corrected, sharpened and ICC-matched or profile-embedded into 48 bit format.

Why is it important to optimise images in 48 bit color space?

Tonal range has always been a major concern in color reproduction. To scan into 24 bit and to do the required corrections on the 24 bit image in Photoshop has been the standard procedure for quite some time. This approach always deteriorates the image quality because it reduces the tonal range significantly. The tonal range (number of shades) is important to retain as much details in the image as possible. Click to enlarge Histogram 1 is showing a smooth tonal range without any gaps. That indicates all shades are well distributed over the whole tonal range. After applying corrctions to a 24 bit image the histogram will look similar to Histogram 2: Gaps indicate that shades have been lost from the tonal range and the image quality has been compromised.


Histogram 1 is showing a smooth tonal range without any gaps. That indicates all shades are well distributed over the whole tonal range. After applying corrctions to a 24 bit image the histogram will look similar to Histogram 2: Gaps indicate that shades have been lost from the tonal range and the image quality has been compromised.

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SilverFast assures uncompromised tonal range with 48 bit correction

SilverFast Ai for scanners and SilverFast HDR for raw data processing now offer to do all corrections in 48 bit color space. In this extremely large color space no siginificant shade is lost during image corrections. When all corrections are done the image can be saved into 48 bit again and further corrections can be done later without significant loss of quality.

SilverFast Scan Type (Image Type in HDR) has 2 additions now: 48 bit Color and 16 bit Grayscale. While 48 bit HDR Color scans into an uncorrected 48 bit raw data file (only gamma correction and ICC-matching can be applied), 48 bit Color or 16 bit Grayscale allow to save all corrections into the raw date file (48 or 16 bit Tiff file). It is also possible to scan directly into Photoshop using the image corrected high bit mode.



The corrected image of the car exhibits excellant image quality. The tonal range of the image is uncompromised (Histogram 4) and can be used for further corrections without any loss in image quality. This exemplifies the extraodinary quality and unique productive power of SilverFast Ai / HDR.


Try the SilverFast Ai or HDR demo and see for yourself!