Reconstruction of volumetric reflectance using spatio-sequential frequency correlation imaging

Tsuyoshi Takatani, Takahito Aoto, Kenichiro Tanaka, Takuya Funatomi, Yasuhiro Mukaigawa

Abstract: In this paper, we propose a novel pro-cam technique for reconstruction of the volumetric reflectance inside an object. The key concept is use of spatio-sequentially modulated illumination to extract only the required signal at a 3D point. We discovered an effect where a projector and camera pair with different focal lengths naturally produced a spatial frequency modulation. By combining this effect with a direct conversion technique to demodulate the signals, the resulting spatio-sequential frequency correlation enables reconstruction of the reflectance at a 3D point within the object. Experimental results based on both synthetic and real data show that the proposed method can reconstruct volumetric reflectance discretely.