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3.5.2 Dither
The Dither mode is primarily used for black and white photographs. It accelerates scanning speed by
choosing one of the five preset dither patterns described in
“3.1.3 Dither” on page 28
.
3.5.3 Brightness
For information on the Brightness property, refer to
“3.1.4 Brightness” on page 29
.
3.5.4 Area
For information on the Area properties, refer to your application’s user manual.
3.6 Image Filters
The following image filters are provided with the ISIS driver. For information about filters not described in
this manual, refer to your application’s user manual.
Filter
Description
Barcode Detection
Recognized barcodes
Border Removal
Removes the black areas around the images
Crop
Removes the white areas around the images
Deskew
Corrects the skew
Dilation
Makes the characters thicker, etc.
Erosion
Makes the characters finer, etc.
Halftone Removal
Removes the halftones
Hole Removal
Removes the images of punched holes
Image Scaling
Enlarges or reduces the image size
Invert Image
Converts white into black and vice versa
Line Removal
Removes the lines
Noise Removal
Reduces the noise
Patchcode Detection
Recognizes patchcodes
Rotation
Rotates the images in 90-degree increments
Skeleton
Turns images into fine lines
Smooth
Removes protrusions and indentations from text as well as lines
Table 8: Image Filters and Descriptions