Image updating problem L4.2

i try to make user can edit there uploaded image but i want to edit image which belongs to only his/her. In my case user able to edit other image my controller is http://laravel.io/bin/QNkyD my route is http://laravel.io/bin/6L8X4 my view http://laravel.io/bin/zjXld and my models are http://laravel.io/bin/BLBzN

help me!! thanks!