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Raster to Vector Conversion: Basic Commands Overview, A Lesson from GTX (Part 2)
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Raster to Vector Conversion: Basic Commands Overview, A Lesson from GTX (Part 2)

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Learn how to convert raster to vector elements and drawings using GTXRaster CAD Plus. Understand how to prepare images for raster to vector selection, select the vector conversion options, use vector …

Learn how to convert raster to vector elements and drawings using GTXRaster CAD Plus. Understand how to prepare images for raster to vector selection, select the vector conversion options, use vector clean up functions and save the image or drawing. See examples of raster conversion and learn more about GTXRaster CAD Plus, the premier raster editing software named "the Autocad for Raster".

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  • 1. Basic Raster to Vector Conversion Commands (The second in a series on GTXRaster CAD® functions)
  • 2. GTXRaster CAD PLUS® …“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 Plus provides many commands that will convert data between CAD and raster formats. These commands are found under the GTXConvert menu…
  • 4. 1. gCONVRT converts selected raster data to vector 8. gTRACE traces vector lines, arcs, and circles over selected raster geometry (raster remains) 2.gHYBRIDMODE enable vector overlay of drawn raster lines, arcs, circles, rectangles, and text 9. gVECTOR traces raster to vector lines, arcs and circles. 3. gRASTER converts selected vector entities to raster 10. gDRO_BK sets all image entities’ draw order behind other entities 4. gECONVRT creates a vector edge around selected raster 11. gREDUCE reduces a multi-color image to a more manageable number of colors 5. gEDGE Creates a raster edge around selected raster 12. gSEPARATE separates colors to discrete bitonal images 6. gHTEXT edit vector text and create a raster text underlay gHYBRIDMODE 13. gBITONAL automatically reduces a color image to a binary (1- bit) image 7. gBURN converts all vectors to raster, “burning” them into the current raster image 1 2 3 4 5 6 7 8 9 10 11 12 13
  • 5. Basic raster to vector commands are the focus of this presentation, the second in a series of tutorials. View Part 1:
  • 6. GTXRaster CAD Plus gives you the ability to convert your entire drawing into a DWG format in a matter of few mouse-clicks! Please note, text and geometry vectorization are two separate algorithms and have to be performed separately. In this lesson you will learn how to vectorize all geometrical entities in the drawing.
  • 7. Prepare Image for Raster to Vector Selection 1.
  • 8. • Zoom to extends to get a view of the entire drawing by typing “z” – Enter - “e” – Enter • Click on the Raster to Vector Icon • Use IOP All icon to select the entire drawing
  • 9. • Zoom to extends to get a view of the entire drawing by typing “z” – Enter - “e” – Enter • Click on the Raster to Vector Icon • Use IOP All icon to select the entire drawing IOP = Intelligent Object Picking – GTX’s advanced technology to make the selection of raster objects as easy as handling CAD entities.
  • 10. • Zoom to extends to get a view of the entire drawing by typing “z” – Enter - “e” – Enter • Click on the Raster to Vector (gCONVRT) Icon • Use IOP All icon to select the entire drawing Now the entire drawing is ready to convert to vector, but, remember geometry and text must be vectorized separately.
  • 11. Notice that all text entities have been excluded from the selection and are now marked in red. If certain parts of any objects such as the hatch and dashed lines have been deselected, add them back in. • Remove text from your selection using IOP Remove and IOP All Text icons • Click Enter once all geometrical entities are added to the active selection • Add hatch and dashed lines deselected in error back into the active selection using IOP Add • Select IOP Window and window around the hatch and dashed lines to include them in the selection
  • 12. Set Vector Conversion Options 2.
  • 13. Then… The following Vectorization menu will appear. For the purposes of this lesson we will select: • Conversion Type: CAD • Rectify: Ortho (locking vertical and horizontal lines if slightly skewed) • Advanced:  Check the box for Arrowheads to include them in the vector file  Check the Linear Alignment box. Linear Alignment is designed to join “broken” lines at a specified “Gap to jump”. In this case, select the gap of 20 pixels.  Save Raster: Uncheck. When checked, allows you to save the initially selected raster as a reference. Uncheck to allow you to see the vector entities separately. 20
  • 14. Now… Entities are converted and text still appears on the drawing as a raster image.
  • 15. Now… Entities are converted and text still appears on the drawing as a raster image. We’ll cover text conversion in the next presentation.
  • 16. A side note about CAD vs. Contour conversion CAD generates typical lines, arcs, circle geometry whereas contour is used for mapping applications where polyline generation is needed.
  • 17. 3. Vector Cleanup
  • 18. In addition to raster editing and clean up, GTXRaster CAD PLUS 2014 offers comprehensive vector clean up to aid in cleaning drawings after conversion from raster. 1. gVSKEW deskews vector data 2. gRELIMIT combines trim and extend for lines 3. gJOIN joins lines 4. gCONCEN moves circles and arcs to be concentric about a location or about the centerpoint of a specified circle or arc 5. gCALIKE changes circles and arcs to have the same radius as a selected circle or arc 6. gCELEV assigns incremental elevations to multiple polylines 7. gRAHEAD erases “arrowheads” (solids with three points) 1 2 3 4 5 6 7
  • 19. • In this drawing area, focus on the area to the left of the cam. • Bring up GTX VClean toolbar from the toolbar’s panel • Click on the Join Lines (gJOIN ) icon • Select two lines that you wish to join, by clicking on them. • Press ENTER to execute the command. In this section, learn how to join “broken” vector lines.
  • 20. Before and After
  • 21. 4. Save Changes
  • 22. Click on the Save Raster (gSAVE) 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.)
  • 23. For more GTXRaster CAD lessons: Coming Soon: Part 3: Intermediate Raster Clean-up and Editing
  • 24. Contact us to find out more about: • 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 • Scanning Drawings Find out more about GTXRaster CAD …the AutoCAD for raster. (and other raster editing, hybrid editing and conversion to vector products) Windham Document Systems