User blog:RoIento/Remove background and borders from photos?

I've recently uploaded three photos to this Wiki, the three coloured stars (red, green and gold) you receive when completing a level. I would like to use these on my profile but a much smaller size so I can include it in my stats tables, and also to add the full size to the Stars article. However, If I include the photos from the 'Photo' section under the 'Add features and media' when in edit mode, it will create borders around the edges and will have a background colour, even though the image itself is transparent, and so should not have any borders or background colour behind it. Is there a way to remove the borders and background so only the image is there, as it also increases the size of the whole image having a border. I will include an example below.



There should be no borders or background colour to the above image. Of course anyone can use these images as well if they wanted to :)