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Minimum Area: (1 - 1000) Sets the number of surrounding pixels to consider when assigning a color to a pixel. 1 results in the most detail and 1000 the least. The examples below have different 'Minimum Area' values and default settings for the rest.

Minimum Area: 1	Minimum Area: 100

Curve Fit: This sets how smoothly outlines are drawn. Your choices are: Pixels, Very Tight, Normal, Smooth, Very Smooth. Pixels result in a more scattered outline. Very Smooth results in a a more uniform outline. The examples below have different 'Curve Fit' values and default settings for the rest.

Curve Fit: Pixels	Curve Fit: Normal	Curve Fit: Very Smooth

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