Autodesk 00126-050008-1640A User Guide - Page 110

WiseImage - User's Guide 2. Specify the maximum size of holes to be removed in the current units (left box) or in points (right box). - or Set the Auto Estimating option so that the filter automatically estimates hole size before filtration. To measure raster hole size on the screen, click on pixel inside the object. - or Click the button and pick two pixels on the screen. The program will estimate hole size equal to the distance between these pixels. 3. Choose Apply. Smoothing This filter smoothes raster object outlines, fills edge and inner background droplets, and partially removes raster speckles. Original image fragment After smoothing This filter processes images in two steps. During the first step a median operation on a grayscale image (see description on page 86) is performed. This algorithm analyses the area of a specified radius of each pixel and moderates the extremes of brightness. As a result, the outline seems blurred and the raster object edges are converted to stripes of different brightness value. As Medianing value increases, gray stripes widen. First step - edge blur 112 Second step - binarization