Other projections are possible
You can stitch on the plane and then warp the resulting panorama
What’s the limitation here?
Or, you can use these as stitching surfaces
But there is a catch…
What s your focal length, buddy?
Focal length is (highly!) camera dependant
Can get a rough estimate by measuring FOV:
Can use the EXIF data tag (might not give the right thing)
Can use several images together and try to find f that would make them match
Can use a known 3D object and its projection to solve for f
There are other camera parameters too:
Optical center, non-square pixels, lens distortion, etc.
Correct for “bending” in wide field of view lenses
Use this instead of normal projection
Focal length – the dirty secret…
f = 180 (pixels)
f = 280
f = 380
Radial distortion of the image
Caused by imperfect lenses
Deviations are most noticeable for rays that pass through the edge of the lens
Blending the mosaic
An example of image compositing: the art (and sometime science) of combining images together…