Study on Chromatic Aberration of Two Fisheye Lenses

Chromatic aberration is observable especially with wide angle lenses. This paper presents a study on chromatic aberration of two fisheye lenses. Both tested lenses produce images with obvious colour aberration. Four different mathematical models were tested to compensate the aberration of distinct colour channels; shift and scale, affine, projective and polynomial. The model parameters were obtained by registering the red and blue channels to the green one. The performed experiments revealed that shifting and scaling of the colour channels is adequate to compensate most of the chromatic aberration of tested fisheye lenses. It also turned out that same corrections can not be applied to different aperture and focus settings. Registering of the colour channels improved the image quality notably.