Spectrum Color Background Saturation and Dropout
Reduce file size and clean up noisy documents
With this feature, you can save up to 40% in file space when scanning documents with color backgrounds. Spectrum does this by saturating or “smoothing” document image backgrounds into one uniform background. “Smoothing” refers to the automated process of modifying pixels to create a fixed, uniform background. This process removes both scanning and paper non-uniformity and will allow the image to be compressed more effectively.
Like with Auto Color Detect, users can modify a threshold setting to determine how “aggressive” the algorithm is in determining if a pixel is a background pixel. In general, with higher aggressiveness, more pixels will be considered background pixels and vice versa with a less aggressive setting. Either way, this feature will create more uniform document output for those documents with color backgrounds, which reduces file size by 20% to 40% on average, sometimes higher.
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Snap to White
In addition, with Color Background Saturation enabled, there is additional “snap-to-white” functionality. If the scanner detects that the page background is near white following background saturation (generally a very light gray), the system will modify the background to force it to a clean white background – also called “saturated white.” This functionality is similar to setting Brightness to 60 to 65 or higher on the Clarity tab in the VRS interface – but that only works to saturate documents already having white backgrounds based on one manual setting.
Background Color Dropout
Users can also drop out unnecessary color backgrounds altogether while capturing all color information in the foreground of the electronic image. This functionality presents a unique way to stretch storage capacity, preserve only “mission critical” information and tightly control storage costs. To utilize Color Background Dropout, users just need to select “White” as their color background through the VRS interface rather than saturated or “Smooth.” Similarly, a document’s color background can be replaced with black if so desired.
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