A Flexible Architecture for Fisheye Correction in Automotive Rear-View Cameras
Fisheye cameras are finding an increasing number of applications in automobile rear-view imaging systems due to their ultra-wide-angle properties and cost-effectiveness. However, while fisheye lenses provide very large wide-angle views (theoretically the entire frontal hemispheric view of 180°) the images produced suffer from severe distortion as a result of the hemispherical scene being projected onto a flat surface. For a viewer of fisheye images, such distortion can be both unusual and confusing. Therefore, it is desirable that the images captured by fisheye cameras be corrected to approximately rectilinear versions before being presented to viewers in applications such as automobile rear-view cameras.