Live Trace in Adobe Illustrator is a automated and a quick way to easily convert any bitmap or raster image into vector graphic. A lot of raster images or logos have a white background and most of the time when you live trace, you only need the image with transparent background. So in this tip, I will quickly show how you can easily do away with white background using "Ignore White" command.
Just to show you a example, lets use this Shopping bag image from sxc.hu. Open a new document and place the image, File > Place in Illustrator.
Next press on the Live Trace button on the option bar and click on Tracing option dialog as shown in the image below.
In the dialog box choose the settings that you prefer,(I just choosed Photo High Fidelity for Preset and all other settings to default) now, click the checkbox ON for Ignore White as shown in the image below. Remember to check the Preview button to see the changes.
If checked, the Ignore White checkbox allows users to decide whether Illustrator shall leave/omit the areas that include white transparent and if unchecked they shall be filled in with white.
Click on the Trace button when you're done. And here is your image without the white background. Below I have added a blue gradient n the background, just to show you that now you have your vector shopping bag without the white background.
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