Panoramic view in cameras is a trick in stitching angle of images. To reveal the bending angle, you can take a panoramic shot with a known curvature in the foreground, as done in this case with the stairs of the cricket ground. Thereafter, you can compare the bending angles with a normal image of the same foreground. Folks from IISER Pune can easily guess that the panoramic angle in this image is around 180 degrees (actually slightly less than 180 degrees..)
Scatterings 