Figure 4
The road extraction results on the second test image. The road extraction results on the second test image. (a) The input image contains roads of different widths. (b) The road candidates extracted using MLFD with complexity-penalized coefficient λ and response threshold are 0.9 and 0.5, respectively. (c) the detection results of fusion operator[7]. (d) Another results by fusion operator with a larger template size. (e) the result by unbiased detector[22]. (f) The road network reconstructed after MRF optimization. (g) the ground truth.