One of the images I was emailed this week to do a sample raster to vector conversion on with Scan2CAD was the outline of a spindle, some parts of which were very broken up.
If you tried to do a raster to vector conversion on this broken outline, the vectors would not continue smoothly over the breaks.
While it is possible to vectorize over small breaks, it is not possible to do so over large breaks where the original shape is represented by a few remnants.
One way to resolve the issue would have been to ask the sender to try rescanning the original drawing using a lower threshold. However, because the vast majority of the outline comprised good, solid, unbroken lines, I decided to fix it by tracing over the broken parts.
This is very easy to do using Scan2CAD’s raster Bezier Curve Draw Tool, as follows:
- Select the Raster Edit, Draw and Bezier Curve Icons.
- Select a pen size by going to Raster Edit Menu > Pen Size.
- Make a series of left mouse button clicks along the broken line.
- Click with your right mouse button to end. A raster bezier curve is drawn over the broken part of the image, mending it.
(Note that you can use the Bezier Curve Draw Tool for tracing over broken lines and arcs as well as for tracing over broken curves.)
Once the breaks are mended you will be able to achieve a smooth, unbroken raster to vector conversion.
