This tutorial shows you how to use AutoCAD Raster Design toolset to clean up images of scanned paper drawings.
Several problems are frequently associated with images scanned from paper drawings:
- Images scanned from negatives or blueprints have dark backgrounds and light line work that is difficult to read.
- Images may be reversed so that the text and the line work are upside down or backwards.
- Images may show speckles from dirty or faded original drawings.
- Documents may have been skewed or tilted as they were fed through the scanner.
- Images may be distorted, reflecting distortion in the scanned document itself, perhaps introduced through prior reproductive processes (for example, a copy of a copy).
- Images may contain rough line work that is difficult to read.
- Images may contain artifacts from creases, stains, and tears on the original drawing.
AutoCAD Raster Design toolset cleanup utilities, image processing filters, and editing tools are intended to address these problems. The exercises in this tutorial show you how to use these tools to improve the quality of the raster images created from your scanned drawings.
Later tutorials show you how to update raster images by editing or removing raster entities and by adding new raster or vector geometry.