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A-61510 January 2005 3-7
Scanning bi-tonal images
The descriptions below are for scanning bi-tonal images only.
Binarization these settings effect the bi-tonal image. Available
settings are:
• iThresholding: selecting iThresholding allows the scanner to
dynamically evaluate each document to determine the optimal
threshold value to produce the highest quality image. This allows
scanning of mixed document sets with varying quality (i.e., faint text,
shaded backgrounds, color backgrounds) to be scanned using a
single setting thus reducing the need for document sorting.
• Adaptive Thresholding (ATP): the Adaptive Threshold Processor
separates the foreground information in an image (i.e., text,
graphics, lines, etc.) from the background information (i.e., white or
non-white paper background).
Adaptive Thresholding works on gray scale scanned images and
outputs a bi-tonal electronic image. Its strength lies in the ability to
separate the foreground information from the background
information even when the background color or shading varies, and
the foreground information varies in color quality and darkness.
Different types of documents may be scanned using the same
image processing parameters and results in excellent scanned
images. If mixing documents of different colors, paper qualities and
textures and print quality, the Adaptive Thresholding features
optimize each image automatically.