Overview
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With the Path > Trace Bitmap command, Inkscape attempts to convert a bitmap image into a vector graphic one. Inkscape incorporates the Potrace program (http://potrace.sourceforge.net) to provide this functionality, and in-depth documentation about the function of this feature can be found at the web site for Potrace.
In order to achieve a vector graphic image the program attempts to detect edges within the image and guess the shape of the paths. The different methods (algorithms) for detecting the edges within the bitmap image account for the various options available in the Trace Bitmap window. In each case experimentation will be required to determine the optimal settings. The resolution of the image will also have an impact on the accuracy of the trace, and images with a higher resolution do not necessarily yield better results. Lower resolution images will result in smoother paths with fewer nodes.
Brightness
Use this method for images that have high contrast, such as black on white, with sharp edges. Adjust the threshold setting to the lowest setting to provide a continuous shape without holes in the fill areas of the image.
Edge Detection
Quantization / Reduction
Multiple Scanning
Usage
Options & Preferences
Additional Information
After using the Trace Bitmap command, try using the Path > Simplify command to reduce the number of nodes in the object and to increase smoothing.
Related Topics