@techreport{oai:ipsj.ixsq.nii.ac.jp:00052248,
 author = {牧, 淳人 and Atsuto, Maki},
 issue = {25(2006-CVIM-153)},
 month = {Mar},
 note = {The geotensity constraint governs the relationship between four or more images of a moving object in spite of the illumination variance due to object motion. It applies to 3D surface reconstruction as well as to generate illumination image basis for Lambertian surface under a distant point light source. This paper presents a simple method for extending the availability of the constraint to the case that specularities are also present. The key idea is to utilise the fact that highlights shift on the surface due to object motion. That is  we employ five or more images as inputs  and interchangeably utilise a certain intensity subset consisting of four projected intensities which is the least influenced by the specular component. Further  we show an algorithm to directly linearise the image basis by factoring out the specular components as residuals with respect to a linear combination of the intensity subset., The geotensity constraint governs the relationship between four or more images of a moving object in spite of the illumination variance due to object motion. It applies to 3D surface reconstruction as well as to generate illumination image basis for Lambertian surface under a distant point light source. This paper presents a simple method for extending the availability of the constraint to the case that specularities are also present. The key idea is to utilise the fact that highlights shift on the surface due to object motion. That is, we employ five or more images as inputs, and interchangeably utilise a certain intensity subset consisting of four projected intensities which is the least influenced by the specular component. Further, we show an algorithm to directly linearise the image basis by factoring out the specular components as residuals with respect to a linear combination of the intensity subset.},
 title = {Revisiting Geotensity in the Presence of Specular Reflection},
 year = {2006}
}