Convert bitmaps to vector graphics

The Trace Bitmap command converts a bitmap into a vector graphic with editable, discrete areas of color. You manipulate the image as a vector graphic, and you can reduce file size.

When you convert a bitmap to a vector graphic, the vector graphic is no longer linked to the bitmap symbol in the Library panel.

Note: If the imported bitmap contains complex shapes and many colors, the converted vector graphic might have a larger file size than the original bitmap. To find a balance between file size and image quality, try a variety of settings in the Trace Bitmap dialog box.

You can also break apart a bitmap to modify the image with Flash drawing and painting tools.

  1. Select a bitmap in the current scene.
  2. Select Modify > Bitmap > Trace Bitmap.
  3. Enter a Color Threshold value.

    When two pixels are compared, if the difference in the RGB color values is less than the color threshold, the two pixels are considered the same color. As you increase the threshold value, you decrease the number of colors.

  4. For Minimum Area, enter a value to set the number of surrounding pixels to consider when assigning a color to a pixel.
  5. For Curve Fit, select an option to determine how smoothly outlines are drawn.
  6. For Corner Threshold, select an option to determine whether sharp edges are retained or smoothed out.

    To create a vector graphic that looks most like the original bitmap, enter the following values:

    • Color Threshold: 10

    • Minimum Area: 1 pixel

    • Curve Fit: Pixels

    • Corner Threshold: Many Corners

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