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I was wondering are there methods for correcting the whole viewing sphere of a raw fisheye image?

If I understood correctly. The common strategy for removing barrel distortion from fisheye images is first to crop the spherical fisheye image to the rectangular shape and then correct the radial distortion, but then we lose some information from the top and bottom of the original image.

Found this but it makes the fisheye image look blurry and zooming: http://www.tannerhelland.com/4743/simple-algorithm-correcting-lens-distortion/

Ram Koti
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R1pe
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    There is no need to crop and an image gets unavoidably blurry where you magnify it. –  Apr 18 '18 at 08:07

1 Answers1

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Fisheye Calibration: Try to follow the procedure given in this site. It is a checkerboard calibration method.

nsidn98
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  • I in fact have tried this but, because of the strong barrel distortion the undistorted image looked like someone had squished from the each side of the image, while the corners had stayed on place. An visual example of what I mean can be found [here](https://se.mathworks.com/help/examples/vision/win64/CorrectAFisheyeImageForLensDistortionExample_02.png) and still you need to crop this to a rectangle shape and lose some info from the edges. – R1pe Jun 05 '18 at 06:56