Recover an object’s albedo and per-pixel surface normals from three grayscale photos taken under different point lights. Lighting is calibrated automatically from a reference sphere.
- Sphere Geometry – find the reference sphere’s center and radius from one evenly lit image.
- Light calibration – from three sphere images (one per light), estimate each light direction.
- Photometric stereo – with the three calibrated lights and three images of the object, compute an albedo map and a normal-orientation overlay.
Build using g++ on UNIX
make
make clean
Geometry (sphere center & radius) Usage
./Geometry <input_sphere_image> <threshold> <output_params_txt>
Calibration (light directions) Usage
./Calibration <input_params_txt> <sphere_L1> <sphere_L2> <sphere_L3> <output_directions_txt>
Stereo (albedo & normals on the object) Usage
./Stereo <directions_txt> <object_L1> <object_L2> <object_L3> <step> <threshold> <out_normals_img> <out_albedo_img>
