A Binarization Algorithm Based on Shade-Planes for Road Marking Recognition
説明
A binarization algorithm tolerant to both gradual change of intensity caused by shade and the discontinuous changes caused by shadows is described in this paper. This algorithm is based on "shade-planes", in which intensity changes gradually and no edges are included. These shade-planes are produced by selecting a "principal-intensity" in each small block by a quasi-optimization algorithm. One shade-plane is then selected as the background to eliminate the gradual change in the input image. Consequently, the image, with its gradual change removed, is binarized by a conventional global thresholding algorithm. The binarized image is provided to a road marking recognition system, for which influence of shade and shadows is inevitable in the sunlight.
