Setting white and black point values manually
Auto Enhance eliminates the extreme “black” and “white” values and stretches the rest of the pixel information to achieve better images. By default, Auto Enhance works with hard-coded black and white point values. The Auto-enhance settings dialog box contains these hard-coded values. However, if you are not getting the desired results with default values, you can alter these values manually. Experiment in Image View (or in the separate ImageViewer) to achieve the best combination for the white and black point values. Manually set values can be reset to the default values.
There are two ways to use the manually set white and black point values.
Choose Apply WP/BP from the Page ribbon in Image View when you have achieved the best white-black combination, to apply these values to the current page.
You can add the manually set white and black point values into a scan profile. It is worth using auto-enhancement in a profile when you scan subsequent pages having the same colored or grayed background. Use the Pick the last used colors from ImageViewer button in the Auto-enhance settings dialog box for this purpose.
Only color and grayscale images can be modified with Auto Enhance.
To set new values for white and black points
Display an image in Image View, or in the separate ImageViewer and click the Page tab..
Click the arrow next to White Point and choose Set, or select White Point and Set from the shortcut menu, and pick up a color that should be the lightest point, i.e. the new white point value.
Click the arrow next to Black Point and choose Set, or select Black Point and Set from the shortcut menu, and pick up a color that should be the darkest point, i.e. the new black point value.
In this diagram, light blue levels indicate former default settings (30 for white point and 225 for black point), while light brown levels indicate new white and black point settings, respectively.
The Status bar in Image View informs you about the white and black point values. Hover the cursor above White point in the Status bar to see its values. Do the same for Black point.
The White Point and Black Point buttons are also useful for dropping out colors (typically forms use drop-out colors).
To use the modified white and black point values in a scan profile
In Desktop view, on the Scan pane, select a profile which should contain the modified black and white point values.
Click Settings, then the SET tab.
On the SET panel, turn on Auto-enhance.
Click Auto-enhance Settings.
Click the Pick the last used colors from ImageViewer button then click OK.
The scan profile will work with the modified white and black point values instead of the default ones.
Auto-enhancement will always use the modified black and white point values whenever you are scanning pages with this profile.
To reset the default, hard-coded black and white point values
In Image View, on the Page ribbon select
White Point and choose Reset
Black Point and choose Reset.
In the Auto-enhance settings dialog box, click the Reset default colors button, then click OK to reset the default white and black point values in a profile.