Application of U-Net with Global Convolution Network Module in Computer-Aided Tongue Diagnosis

Figure 4

Six cases of fissured tongue images and data preprocessing results: (a) the cracks in the picture are evenly distributed and obvious; (b) the cracks in the picture are scattered and obvious; (c, d) the crack distribution in the picture is scattered and not obvious; (e) the cracks in the picture are widely distributed and obvious, which is difficult to segment; (f) the crack distribution in the picture is single and easy to segment.

(a)

(b)

(c)

(d)

(e)

(f)