Learn how to enhance raster drawings with semi-automatic cleanup using GTXRaster CAD. Understand how to deskew and despeckle scanned drawings, remove solid entities, erase and change raster, and save your changes. See examples of raster editing and learn more about GTXRaster CAD, the premier raster editing software named "the Autocad for Raster".

1. Enhancing a Raster
Image with Semiautomatic Clean Up
(The first of a three part series on GTXRaster CAD functions)
®

2. GTXRaster CAD …“AutoCAD for Raster”
®
…the most valuable raster clean up and
editing software available for AutoCAD
users.
Modify and enhance your legacy paper
drawings in your AutoCAD environment
for use in your current design process.

3. GTXRaster CAD allows you to perform a
semi-automatic clean up of the raster
drawing.
This is the focus of this presentation, the first
in a series of three presentations on
GTXRaster CAD functions.

4. GTXRaster CAD allows you to perform a
semi-automatic clean up of the raster
drawing.
This is the focus of this presentation, the first
in a series of three presentations on
GTXRaster CAD functions.
(Don’t worry, with GTXRaster CAD you can fine tune
clean up with manual manipulation…but that’s
covered in another lesson.)

5. 1.
Straighten and
Despeckle

6. This drawing is slightly rotated (skewed) and
has small stains (speckles) along the perimeter.
Run the gClean IOP
command that
automatically straightens
the drawing and selects
everything it considers as
noise or unnecessary
content.

7. Then…
• Everything considered
noise or speckles is
selected in green.
• Examine the drawing carefully
to make sure that important
data hasn’t been selected.
• Remove anything
selected as speckles
using the IOP Remove icon then
selecting the IOP Window
around the raster.
• Press ENTER to execute the
command.

8. 2.
Remove Solid
Entities

9. Solid entities consume a lot of memory and
are generally hard to vectorize, especially if
they have holes in them or are not 100% filled.
GTXRaster CAD Series allow you to Edge the
solid raster entities.

10. • Click the Edge Icon to run
the command.
• Zoom around the GTX solid logo
in the lower-right corner of the
drawing.
• Select the GTX logo using
IOP Object icon.
• Press ENTER.

11. And…

12. 3.
Erase Raster

13. GTXRaster CAD allows you to erase raster
entities interactively using GTX Raster Picking
tools. For this lesson we’ll erase the table
around the text in the upper right corner of the
drawing.

14. • Zoom closely into the table.
• Click on the Erase
Raster Icon.
• Select the table
using the IOP
Fence icon by dragging a
line across the table and
avoiding text. The raster is
selected.
• Press ENTER to execute the
command.

15. 4.
Change Raster

16. GTX Software gives you the ability to
“change” raster lines, circles and arcs using
original image pixels, thus eliminating the
lengthy erase-redraw process.

17. • Zoom into the upper-left area.
• Select Change Raster Circle
command to change the radius
of the circle.
• Click on a point and drag the rubber-band to
indicate the circle.
• Enter a new radius, 0.5 for example, on the
command line.
• Use Change Raster command for lines and
arcs as well:
Lines: change the length and the
angle of the line, where your first
selection point will become the point
of displacement
Arcs: change the circumference
and the radius of the arc, where
your first point becomes the point of
displacement

18. 5.
Save Changes

19. Click on the Save Raster icon to save
the raster image. Use the AutoCAD
save command to save the vector entities.
(The raster file is saved as a reference image linked to the
AutoCAD DWG file by a directory path. Therefore, if you
move or rename the original raster file, AutoCAD will no
longer be able to locate and attach it to your DWG.)

20. Stay tuned for more
GTXRaster CAD lessons:
Part 2: Basic Raster to Vector Conversion
Commands
Part 3: Intermediate Raster Clean-up and
Editing

21. Contact us to find out more
about:
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•
•
•
•
•
•
•
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Raster Editing
Raster to Vector Conversion
How to edit raster drawings
Modifying drawings
Converting raster to vector
Working with paper drawings
Modifying raster files
Raster drawing tools
R2V
Should I convert my raster
drawing?
• How to convert my raster
drawing
• Modifying scanned drawings
(and other raster editing, hybrid editing and conversion to vector products)
• Scanning Drawings
Find out more about GTXRaster CAD
…the AutoCAD for raster.
Windham Document Systems