LED

1. LED Camera Scene Q Q P P Wood Chair Camera Camera Camera Ordering from three different planes Bunny Bunny Buddha Buddha Dragon Dragon 0.05 0.05 Vertical Vertical Horizontal Horizontal 0.015 0.015 0 0 1 1 Novel Depth Cues from Uncalibrated Near-field Lighting Sanjeev J. Koppal and Srinivasa G. Narasimhan 1. Plane-Scene Intersections Light source moves in a line Detect intensity maxima Results appear similar to light-striping Intensity Maxima in Lambertian Scenes The intensity, E, at any time t for a lambertian scene is given by: Scene Input Images Metal Office Desk Plane-Scene Intersections P The location of the maxima is found by setting the derivative to zero: Plane Perpendicular to source path. Plane-Scene Intersections The maxima location occurs at P if the light source is close to scene and D is small. Painted House Vertical and Horizontal Intersections 2. Depth Ordering for Homogeneous Scenes Light source moves in a plane Integrate pixel intensities Ordering as a pseudo depth Overlapping Incident Angles Scene Input Images Polyresin Statue Depth Ordering Rendering The integral of intensities at any scene point P, consists of angles that either overlap with those at scene point Q or are different: Right Plane Left Plane Depth Ordering Image Plane Evaluation using Renderings 3. Symmetry Pairs for Homogeneous Scenes Light source moves in Match identical intensities Method works for isotropic BRDFs bisecting plane Lambertian + Torrance-Sparrow Scores Oren-Nayar Scores Depth Ordering Correctly Ordered Fraction Correctly Ordered Fraction 0.80 0.95 Scene Input Images 0.75 0.65 0 1 Roughness Roughness 0 1 Lambertian + Torrance-Sparrow Scores Oren-Nayar Scores Plane-Scene Intersections Plane Fit Error Plane Fit Error Metal Office Desk Symmetry Pairs Symmetry Pairs Roughness Roughness