Investigation on the Correction Algorithm of Lamina Based on Bilinear Mapping

This paper proposes the correction algorithm of lamina based on bilinear mapping aimed at the problems of image incline and geometric distortion when collecting field lamina images using digital camera. The validity of measurement has not been influenced by size, figure differential and white background of laminae. The experiment shows that the accuracy can reach to 99% when using this method to correct the lamina image, which is the basement of extracting the lamina features.