… In this section, we investigate the role of the generalized bas-relief ambiguity on surface
reconstruction using photometric stereo. Let us assume that a Lambertian surface is illuminated …

… ambiguity is a simple one : distance is not an invariant for the … Though the bas-relief ambiguity
is resolved for general 3D … that a non-linear ambiguity remains in the case of surfaces with …

… This paper presents an algorithm to resolve the Generalized Bas-Relief ambiguity based on
a novel prior on the observed albedos. In addition to providing an intuitive reasoning in favor …

… The solution biases towards at surfaces. We also explore the coupling between the ambiguities
arising from shading/shadows and from the observer's egomotion (ie the object and the …

… Generalized Bas-Relief (GBR) ambiguity. In this paper, we examine this ambiguity in the
context of … component, and we show that the GBR ambiguity is resolved by any nonLambertian …

… Unfortunately, the SFM analysis of a pair of … an ambiguity in interpretation, the bas-relief
ambiguity [6], which both distorts the structure and re-orientates the axis of rotation (unlike the …

… describes an important special case of the problem of ambiguity. The GBR ambiguity shows
how we can make drastic changes in the shape, reflectance, and illumination conditions of …

… Using only the information from the shadowgrams, any attempt to extract light positions is …
Bas-Relief ambiguity as shown in [9]. In the next section, we will show that considering the …

… be modeled [1] 蠶] the previous linear methods cannot cope well with … the shape i cost
function under the bas-relief ambiguity can bell narrow diagonal valley [7], we cannot improve the …