Autodesk 00126-050008-1620A - Autocad 2006 Essentials User Manual page 216

WiseImage – User's Guide
Smoothing
Export Raster
to Layer
Step2
Set the Recognition parameters: Max Width, Min Length and Accuracy.
These parameters are equal to those for monochrome images in the raster to vector
Conversion Options dialog and the Raster Properties toolbar.
related buttons and controls:
Min Length
Max Width
Accuracy slider
Step3
Switch off the Separate by color checkbox and define a preview area so that all the
objects of all the colors present in the raster image can be seen.
222
Select this checkbox to smooth the image. The Smoothing
slider controls the smooth level. Moving this slider right
makes the smooth level higher while moving left makes it
lower.
Switch on this checkbox to obtain a monochrome raster
image or to preview the binarization results. Specify the
color and layer for the monochrome raster image.
Sets the minimum length of a raster fragment which
should be recognized as a polyline in the vectorization
process.
- Specify the length of the shortest raster line.
- In order to measure directly from the image, click the
button and draw a line along the smallest raster line.
Sets the maximum width of a raster linear object which
should be recognized as a polyline.
- Specify the value of this parameter slightly greater than
the maximum width of the raster line to vectorize.
- If the program does not vectorize raster segments, then
increase the value of this parameter. If the program does
not approximate flooded raster areas by boundary
objects, then reduce the value of this parameter.
- In order to measure directly from the image click the
button and draw a perpendicular line to the widest raster
line you want to recognize.
Sets the accuracy of raster lines approximated by vector
objects. If the quality of the raster image is poor, then
reduce the parameter value so that the function will be
able to recognize raster objects with significant form
distortions.