Estimate the tilt of a light source.
estimate_tilt_zc estimates the tilt of a light source, i.e., the angle between the light source and the x-axis after projection into the xy-plane, from the image Image using the algorithm of Zheng and Chellappa.
Image (input_object) |
image(-array) -> object |
Image for which the tilt is to be estimated. |
Tilt (output_control) |
angle.deg(-array) -> real |
Angle between the light source and the x-axis after projection into the xy-plane (in degrees). |
estimate_tilt_zc always returns the value TRUE.
sfs_mod_lr, sfs_orig_lr, sfs_pentland, phot_stereo, shade_height_field