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fisheye image to equirectangular

Hello

for stitching images i want transform a fisheye image to a equirectangular image like nona (hugin) in hugin i can do this

my fisheye has 80 degree HFov

pto_gen --fov=80 -p 2 test22_r.jpeg

http://lpaste.net/147153 hugin pro file

nona -o test22_r_equirectangular.jpg test22_r.pto

is this possible with opencv ? i look at detail::SphericalWarper but no idea how i can set the destination matrix for equirectangular

here is the input and output http://snag.gy/bmE15.jpg http://snag.gy/RLaSI.jpg