In this exercise you learn to use touchup tools to correct imperfections in scanned bitonal drawings.
Related Exercise
Before doing this exercise, ensure that AutoCAD Raster Design toolset options are set as described in the exercise Exercise A1: Setting AutoCAD Raster Design Toolset Options.
Exercise
- In the Tutorial2 folder, open the drawing file Scanned_07.dwg.
-
You see diagonal lines of varying thickness that need repair. To work more accurately, you should zoom in close.
Repair Diagonal Lines
- Click
Raster menu
CleanupTouchup.
- On the
Touchup toolbar, click
to select a diagonal brush, then click
to resize the brush.
- Click on the edge of a line that you want to repair, click another point along the same edge, then click a third point to specify a brush width that is approximately equal to the width of the line.
- On the
Touchup toolbar, ensure that the drawing color icon
shows the white square in front, indicating that the brush will create white pixels, rather than erasing them.
- Use the brush to repair some gaps in the line. Note that this brush, depending on its length, may be suitable for editing lines in only one direction. To work on lines in another direction, you must resize the brush.
- Optionally, to draw a straight line with the brush, click to start the line, then hold down the
Shift key and click an endpoint for the line.
Use Round Brush
- On the
Touchup toolbar, click
to select a round brush.
- Click
to resize the brush, so its diameter matches the width of a line.
- Use this brush to repair some gaps in a line. Note that this brush is useful for drawing in different directions and around curves.
- Click the drawing color icon
to draw in the background color (black). Use the brush to erase unwanted pixels along some of the lines.
- Further exploration: Use the square brush in the same way as the round brush to draw and erase. This brush shape is better suited to working with vertical and horizontal lines. See the right side of the drawing for lines of this type.
- Close the drawing without saving changes.