HH1800 User Guide
157
U - Document Image Filter
Allows you to input parameters to sharpen the edges and smooth the area between the edges
of text in an image. This filter should be used with gamma correction (see
), with the
scanner in a stand, and the image captured using the command:
IMGSNP1P0L168W90%32D
This filter typically provides better JPEG compression than the standard E - Edge Sharpen
command (see
). This filter also works well when shipping pure black and white
images (1 bit per pixel). The optimal setting is 26U.
0U
26U
n
U
Document image filter off
(default)
Apply document image filter for typical document image
Apply document image filter using grayscale threshold n. Use lower numbers
when the image contrast is lower. 1U will have a similar effect to setting
(page 150) to 22e. Range: 0-255.
Example:
Document Image Filter set to 0U:
Document Image Filter set to 26U:
V - Blur Image
Smooths transitions by averaging the pixels next to the hard edges of defined lines and
shaded areas in an image.
0V
1V
Don’t blur
(default)
Blur
Example:
Blur Image Off (0V):
Blur Image On (1V):
