Name
Abstract | ||
|---|---|---|
We present a new shape from shading algorithm, extending to the single-input case, a recently introduced approach to the photometric motion process. As proposed by Pentland, photometric motion is based on the intensity variation, due to the motion, at a given point on a rotating surface. Recently, an alternative formulation has also appeared, based on the intensity change at a fixed image location. Expressing this as a function of reflectance-map and motion-field parameters, a constraint on the shape of the imaged surface can be obtained. Coupled with an affine matching constraint, this has been shown to yield a closed-form expression for the surface function. Here, we extend such formulation to the single-input case, by using the Green's function of an affine matching equation to generate an artificial pair to the input image, corresponding to an approximate rendition of the imaged surface under a rotated view. Using this, we are able to obtain high quality shape-from-shading estimates, even under conditions of unknown reflectance map and light source direction, as demonstrated here by an extensive experimental study. |
Year | DOI | Venue |
|---|---|---|
2010 | 10.1007/s10044-009-0156-z | Pattern Anal. Appl. |
Keywords | Field | DocType |
single-input case,photometric motion,affine matching constraint,surface function,imaged surface,computer visiongreen's functions � matching equationsphotometric motion � shape estimationshape from shading,alternative formulation,photometric motion process,input image,affine matching equation,fixed image location,computer vision,shape from shading | Affine transformation,Green's function,Silhouette,Mathematical analysis,Photometry (optics),Artificial intelligence,Geometry,Exact solutions in general relativity,Shadow,Pattern recognition,Reflectivity,Photometric stereo,Mathematics | Journal |
Volume | Issue | ISSN |
13 | 1 | 1433-755X |
Citations | PageRank | References |
1 | 0.36 | 33 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| João L. Fernandes | 1 | 16 | 3.80 |
| José R. A. Torreão | 2 | 59 | 10.18 |