Scanned documents often come with "dust" (stray pixels) or skewed angles. Instead of struggling with a crooked background, you can use specialized cleanup tools:
The "Holy Grail" of raster AutoCAD is turning pixels into editable lines. The toolset provides several methods: raster autocad
(princ "\n3D raster surface generated.") (command "_.UNDO" "_END") (setvar "cmdecho" 1) (princ) ) Scanned documents often come with "dust" (stray pixels)
Use "Despeckle" and "Bias" tools to remove noise from old, grainy scans. raster autocad
Straightens images that were scanned at an angle so they align perfectly with your coordinate system.
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Before diving into the tools, it is essential to understand the difference: