Hole punch removal

When you scan a page that contains punch holes, their traces might be visible on the resulting image. This filter removes hole marks of a particular size set in the dialog from 1-bit documents.

To remove hole traces, select appropriate Measure unit (one thousandth of an inch or pixels) and indicate Hole Location (left, right, top, bottom or default, which is set to left).

You can set Hole Dimensions (width and height ranges) or rely on default dimensions. The default dimensions are calculated from the image width and height (if the selected measure unit is Pixels) or from the image DPI (if the selected measure unit is Inches).

In the Hole Count section you can set the minimum and maximum amount of holes to be removed with use of two respective sliders. The minimum possible number of holes is 2. If you select the Use Default Count check box, the default values for hole count will be used: 2 for minimum hole count, and 4 for maximum hole count.

Changes that will be applied to the image are reflected in the preview at the top of the window. Select the appropriate image scale (1:1 or Fit to Window).

You can preview the results in the viewport at the top of the dialog box using different colors for indication of white and black regions at the output. To display changes in the preview image, select the Show Changes as Color Selection box and pick the colors in the Color Picker dialog that opens by clicking on the Black Area and White Area buttons at the bottom of the dialog.