Portal de Periódicos da CAPES

Determining surface orientations of transparent objects based on polarization degrees in visible and infrared wavelengths

2002; Optica Publishing Group; Volume: 19; Issue: 4 Linguagem: Inglês

10.1364/josaa.19.000687

1520-8532

Daisuke Miyazaki, Megumi Saito, Yoichi Sato, Katsushi Ikeuchi,

Surface Roughness and Optical Measurements

Techniques for modeling an object through observation are very important in object recognition and virtual reality. A wide variety of techniques have been developed for modeling objects with opaque surfaces, whereas less attention has been paid to objects with transparent surfaces. A transparent surface has only surface reflection; it has little body reflection. We present a new method for obtaining surface orientations of transparent surfaces through analysis of the degree of polarization in surface reflection and emission in visible and far-infrared wavelengths, respectively. This parameter, the polarization degree of reflected light at the visible wavelengths, is used for determining the surface orientation at a surface point. The polarization degree at visible wavelengths provides two possible solutions, and the proposed method uses the polarization degree at far-infrared wavelengths to resolve this ambiguity.