07-12-2017, 05:15 PM
In your sample image you have a pure white background. This isn't always the case, there are sometimes jpg artifacts etc. The general method is:
1. Get rid of most of the background. Use the Fuzzy Select tool to select the white background. Delete the background. Deleting will get rid of the off white jpg artifacts etc
2. Step 1 will leave a light (almost white) halo around the image. Use (Select > Grow) with a suitable value (often 1 to 3 pixels) to include the white halo in the selection
3. Use Colour > Colour to Alpha with the default white to get ride of the white halo
4. Select > None
1. Get rid of most of the background. Use the Fuzzy Select tool to select the white background. Delete the background. Deleting will get rid of the off white jpg artifacts etc
2. Step 1 will leave a light (almost white) halo around the image. Use (Select > Grow) with a suitable value (often 1 to 3 pixels) to include the white halo in the selection
3. Use Colour > Colour to Alpha with the default white to get ride of the white halo
4. Select > None