Table 1 The classification of the methods on depth map generation

Depth from motion

Use relative velocity to judge depth information

[7,8,9, 32]

Depth from perspective geometry

Vanishing line detection

[10,11,12,13]

Depth from model

Color theory

[14, 15, 23, 34]

Depth from defocus

Use blur information to get depth value

[16,17,18,19]

Depth from visual saliency

Estimation in region of interest

[20,21,22]