Graphics Programs Reference
In-Depth Information
produce a phenomenally large number of shapes and
processing can go slowly, but the resulting trace is often
mistaken for a photograph in richness and detail.
If you accidentally get caught up in an overly complex trace, press ESC to stop the process.
Remove Noise
This slider commands the Bitmap
Tracer to ignore very small random pixels you probably
don't want to trace anyway. Use this slider when auto-
tracing heavily dithered GIFs a client or friend might
have sent you from a web page, asking “Can you do
something with this?” And you don't have the heart to
ask them for a lighter.
Minimum Area
Use this slider in combination with
the Remove Noise slider. Minimum Area determines
which fine details might be ignored in the trace, such
as large noisy areas, grains of sand in a photo of the
beach, fringing caused by chromatic aberration with
inexpensive digital cameras, and so on.
Color Tolerance
When you define more than one
pass, you have the option to choose both an initial and a
final color tolerance for the utility to evaluate similarity
of colors in the bitmap, thus reducing or increasing the
number of vector objects created based on the bitmap's
colors. Always set the initial tolerance higher than the
final color tolerance to force the tracing utility to make a
coarse pass and then a finer one, so it is you who decides
to create objects you might never use or need.
This slider controls the fitting of the vector
outline to the edge of contrasting colors in the original
bitmap image. A tighter fit requires a little more system
memory and the result shapes will have more control
handles. Use Accuracy in combination with Smoothing—If
you have a low-resolution bitmap and want high accuracy,
consider increasing Smoothing to avoid auto-tracing the
rectangular pixels themselves in the image. Accuracy has
no impact on how tightly a corner is rendered—if you need
sharp corners on a photo of furniture, for example, you set
the Smoothing slider to a low value.
This slider has an effect on accuracy,
particularly sharp corners in the original bitmap.
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