Adding GIF image to JPG image with transparent area.

1. Install ImageMagick:
sudo apt-get install imagemagick

2. Using convert command from ImageMagick make white part of Arrow.gif transparent and save in file arrow_transparent.gif :
sudo convert Arrow.gif -fuzz 10% -transparent white arrow_transparent.gif 

3. Merge arrow transparent into IMG.JPG at affset 300,300 and save file in RESULT.JPG file:
sudo convert IMG.JPG -page +300+300 arrow_transparent.gif -flatten RESULT.JPG