I am using IM convert tool to remove the background from my image.
I tried following
convert cropped.png -bordercolor black -fuzz 20% -trim SAMPLE_trim.png
convert sample_white2.gif -unsharp 0*1 sample_white3.gif
convert SAMPLE.gif -transparent black trans_black.gif
But no success

Sample image is at following location.
https://drive.google.com/file/d/0BwQfEu ... xrY2M/view