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Tracing bitmaps in CorelDRAW

Tracing bitmaps in CorelDRAW

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Tracing bitmaps

You can trace a bitmap quickly, in one step. You can also trace a bitmap in PowerTRACE, which lets you preview and adjust the traced results. The following topics describe the adjustments you can make in PowerTRACE. For information about previewing traced results, see "Previewing traced results."

Choosing a preset style

A preset style is a collection of settings that are appropriate for the specific type of bitmap you want to trace (for example, line art or a high-quality photo image). Whether you want to trace a scanned sketch, photo, or a detailed illustration, you can choose from several preset styles to achieve optimum trace results.

                         

  Line art                                        Logo
 

                   


  Detailed logo                                Clipart
 

         

  Low-quality image                       High-quality image

Preset styles are available for each of these image types.

Smoothing and adjusting detail

You can smooth curved lines and adjust the amount of detail in the traced result. Smoothing affects the number of nodes in the traced result; detail affects the number of objects and colors.

PowerTRACE provides information about the number of nodes, objects, and colors in a traced result. This information is updated with each adjustment of the settings. For information about changing colors in the traced result, see "Controlling the colors of traced results.

         

Tracing with a low detail value (left); tracing with a high detail value (right).

Removing and preserving the background

With most preset styles, the background of the bitmap is automatically detected and removed. However, you can choose to preserve the background in the traced result. You can also specify the background color to be removed. If the background color around the edges is removed but some background color is still showing through inside areas of the image, you can have the background color removed from the entire image.

Completing a trace

By default, the source bitmap is preserved after a trace, and objects in the traced result are automatically grouped. You can also have the source bitmap automatically deleted once the trace is complete.

Undoing and redoing actions

You can adjust the settings in PowerTRACE and retrace a bitmap as many times as necessary until you are satisfied with the result. If you make a mistake, you can undo or redo an action, or revert to the first traced result.

 

Process to trace a bitmap in one step

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To trace a bitmap in one step

1. Select a bitmap.

2. Click Bitmaps Trace bitmap Quick Trace.

• You can also trace a bitmap in one step by clicking the Trace bitmap flyout button on the property bar, and clicking Quick Trace.

 

Process to trace a bitmap in PowerTRACE

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To trace a bitmap in PowerTRACE

1. Select a bitmap.

2. Click Bitmaps Trace bitmap, and click one of the following:

    • Line art — to trace black-and-white sketches and illustrations

    • Logo — to trace simple logos with little detail and few colors

    • Detailed logo — to trace logos containing fine detail and many colors

    • Clipart — to trace ready-to-use graphics containing a varying amount of detail and number of colors

    • Low quality image — to trace photos that lack fine detail or in which the fine detail is not important

    • High quality image — to trace high-quality detailed photos in which detail is important

3. Move either of the following sliders:

    • Smoothing — lets you smooth curved lines and control the number of nodes in the traced result. Higher values result in fewer nodes and produce curves that follow 
                         lines in the source bitmap less closely. Lower values result in more nodes and produce more accurate trace results.

    • Detail — lets you control how much of the original detail is preserved in the traced result. Higher values maintain more detail and result in a greater number of
                     objects and colors; lower values discard some detail and result in fewer objects.

You can also
 
Change the preset style
Choose a preset style from the Type of image list box.
Keep the source bitmap after a trace
In the Options area, disable the Delete original image check box.
Discard or preserve the background in the traced result
Enable or disable the Remove background check box.
Specify the background color you want to remove
Enable the Specify color option, click the Eyedropper tool , and click a color in the preview window. To specify an additional background color to remove, hold down Shift, and click a color in the preview window.
The last specified color is displayed beside the Eyedropper tool.
Remove a background color from the entire image
Enable the Remove color from entire image check box.
Undo or redo an action
Click the Undo or Redo button.
Revert to the first traced result
Click Reset.

 

   • You can also access PowerTRACE from the Trace bitmap flyout button on the property bar.

 

Copyright 2000-2005 Corel Corporation. All rights reserved.

 

 

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