Blured Frame

1 ) open image
2 ) menu "Select" -> "All"
3 ) menu "Select" -> "Border", set size 30
4 ) set foreground color to white
5 ) select fill color tool , set opacity 50%, click left mouse button on image, the border of image will be filled white color
6 ) menu "Select" -> "None" to clear selection
7 ) select draw line tool , set width 1, rectangle shape, draw line along the white edge ( it's better to zoom in image before draw line )

Example :