Does Inverse Lighting Work Well under Unknown Response Function?

Shuya Ohta, Takahiro Okabe
2015 Proceedings of the 10th International Conference on Computer Vision Theory and Applications  
Inverse lighting is a technique for recovering the lighting environment of a scene from a single image of an object. Conventionally, inverse lighting assumes that a pixel value is proportional to radiance value, i.e. the response function of a camera is linear. Unfortunately, however, consumer cameras usually have unknown and nonlinear response functions, and therefore conventional inverse lighting does not work well for images taken by those cameras. In this study, we propose a method for
more » ... taneously recovering the lighting environment of a scene and the response function of a camera from a single image. Through a number of experiments using synthetic images, we demonstrate that the performance of our proposed method depends on the lighting distribution, response function, and surface albedo, and address under what conditions the simultaneous recovery of the lighting environment and response function works well.
doi:10.5220/0005344406520657 dblp:conf/visapp/OhtaO15 fatcat:q6hh56uph5gijkqwiu3ywo3oaa