Goal of image enhancement
The goal of image enhancement is to eliminate lines, shading, misalignment, and other artifacts that can interfere with the recognition process.
The Datacap Image
Processing tool provides a set of image enhancement capabilities that
you can configure to handle various problem types. However, finding
the best combination of image enhancement settings can take time,
especially if your application must handle multiple page types. Image
enhancement is typically done before the page type is known, in other
words, before page identification. You must set up the image-processing
properties in a way that works well for all page types.
Important: Some special cases are exceptions to this statement.
Rules, or ImageFix Actions, can do multiple passes of image enhancement,
which is also known as image processing, before or after page identification.
The rules can use different settings for different page types or based
on other criteria. The most common use case is a single pass before
page identification. Any image enhancement that is completed before
fingerprint matching must be identical to the image enhancement that
was done on the fingerprint template image when the template was created.
The default image-processing properties are designed to work well with typical printed pages that use plain black text on a white background. Establishing settings that work well for the pages your application must handle requires experimentation. For more information, see Determining appropriate image-processing settings.
The settings that you establish are stored in the file imagefix.ini in the application's dco_<application_name> folder.