Boris FX Boris Calligraphy Vresion 2.0 Uživatelská příručka Strana 557

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Converting Still Image Files into Vectors
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5. Choose Window > Show Vector Trace Palette. The options in this palette affect the
spline creation. Adjust the parameters if you are unable to create the spline that you
want. Since this is a floating window, you can leave it open while you work.
•The Trace Channel menu sets which channel the bitmap trace uses. Choose
Luminance, Alpha, Red, Green, or Blue.
Trace Tolerance determines how closely the generated spline matches the actual
contour of the bitmap graphic. A smaller tolerance creates a spline with more points.
You may want to use a smaller tolerance if your graphic has complicated edges.
Alternatively, use a larger tolerance if your graphics edges are uneven. In this case a
larger tolerance can be used to give your graphic smoother edges.
Trace Threshold sets the range of values that are used to create a particular spline
point.
•When the Invert checkbox is selected, the spline is created from the inverse of the
selection.
•When the Use Pre-Blur checkbox is selected, a blur is applied when finding the
spline edges.
Pre-Blur Amount increases the amount of blur applied when creating the spline.
6. Use one of the following methods to create a spline of your imported still image.
t Trace the outline of the graphic with the
Pencil tool
.
Spline track
Imported media
Shape track
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