The picture is slanted to the right.
1) Load image to Photoshop
2) Go to IMAGE->ROTATE CANVAS->ARBITRARY
3) Input in 1 in Angle and select CCW (Counter Clock-wise)
4) Crop of those white edge using crop tool conform to 3:2 ratio(whatever rati you want)
5) Use curve to up ur midtones a little bit..
This will straighten and brighten your pix ...
Hope this help