fisheye lens image to rectilinear conversion
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:confused:i am a newbie in this field.. does anyone know how to convert a fisheye lens image to rectilinear image using openCV or in visual c++.... any algorithms u know or any other information can be of immense help to me thanks... sanjay
do you know the transformation used to produce the original "fisheye" image ? Image Toolkits | Image Processing | Cleek
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:confused:i am a newbie in this field.. does anyone know how to convert a fisheye lens image to rectilinear image using openCV or in visual c++.... any algorithms u know or any other information can be of immense help to me thanks... sanjay
If it's a true fisheye with 180 degree FOV, conversion to rectilinear would result in an infinite image. If you want to convert a segment cropped from the fisheye image, first you need to know the projection used by the lens. Equisolid angle and equidistant projections are the most common. You can get the projection equations from http://www.root.or.jp/fit/pages/gyogan_eng.htm[^] or http://www.lce.hut.fi/~jkannala/Kannala_Brandt_ICPR2004.pdf[^]. Then reverse the fisheye projection and apply the normal perspective projection instead.