Autodesk 05726-091452-9060 User Guide - Page 131

WiseImage - User's Guide description of Max Width and Max Break see "Tuning Selection " on page 142. If selecting by picking when object recognition is on, then the program selects the entire raster line as shown with outlines on the left figure. Note that, when selecting, intersections of the selected line with other raster objects are not removed. To select a raster entity 1. Click the button on the Raster Select toolbar. 2. Click on a point on the raster image. Selection by Window and Polygon One of the ways to select raster objects is to enclose them in a selection window or selection polygon. A selection window is defined by picking two opposite points, and a selection polygon is defined by sequential picking of its vertices. These methods are divided into two groups. The first group includes methods that select raster data inside a specified area excluding raster objects crossing the area boundary - Within Window and Within Polygon methods. The second group selects raster data inside a specified area including raster objects crossing the area boundary. These methods are called Crossing Window and Crossing Polygon. These methods are object modifications of the standard Window and Polygon selection methods that select all raster data inside a specified area up to its boundary. The operation of Within Window and Within Polygon methods can be represented as a combination of two other selection methods. At first, with the appropriate standard method (Window or Polygon) all raster data inside the area is selected. Then all raster objects crossed by the area boundary are selected by the Object method and subtracted from the data obtained from the first stage. Picking points are the intersection points of the area boundary with raster objects. With Crossing Window and Crossing Polygon, the data selected at the second stage (objects crossing the boundary) is added to the raster data selected on the first stage. The current raster selection type determines the type of raster objects selected by the Object method, and thus affects the type of subtracted or added raster data. 134