A method is described for estimating the 3D reflection properties of painting materials such as oil paints and water paints. A gonio-spectral photometer is used for measuring light scattered from a variety of painting surfaces. The reflectance data are acquired at different incident and viewing geometries. The Torrance-Sparrow model is used for describing light reflection on the painting surfac...

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We derive the bidirectional reflectance distribution function for a class of opaque surfaces that are rough on a macroscale and smooth on a microscale. We model this type of surface as a distribution of spherical mirrors. Since our study concerns geometrical optics, it is only the aperture of the concavities that is relevant, not the dimension. The three-dimensional problem is effectively trans...

Thts paper proposes an approach to acquire 3D models of objects with specular reflectance for graphcs use. Highlight and rotation informations are employed in the model recovery. We control object rotation and extract motion of a hghlight stripe, from which the object shape can be qualitatively inferred and quantitatively reconstructed by solving a first-order linear differential equation. We h...

Cutaneous melanoma is the deadliest skin cancer showing an increasingly growing incidence in white populations of Europe and United States. Intensive research in recent years has begun to unlock its molecular pathogenesis. Screening the neoplasm at an early stage remains primordial. Hence, targeting populations at risk is likely efficient. In such an attempt, the regular clinical examination be...

Current object recognition methods fail on object sets that include both diffuse, reflective and transparent materials, although they are very common in domestic scenarios. We show that a combination of cues from multiple sensor modalities, including specular reflectance and unavailable depth information, allows us to capture a larger subset of household objects by extending a state of the art ...

In this paper, I address the problem of detecting incidental reflection from a sequence of images to improve the quality of background subtraction. This paper begins with a brief overview of previous work on separating specular-reflection from the reflective surface. The model I propose is based on a dichromatic illumination model, while not making any assumptions about the reflectance spectra ...

To improve the interpretation of surface cryospheric albedo from satellite sensor data, diurnal measurements of the spectral bi-directional reflectance of a commonly-found fresh-water ice type were made, from which hemispherical reflectance can be derived. The purpose of this study is to document its clear-sky, bi-directional reflectance characteristics in the visible (650--670 nm) and near-inf...

A number of methods have been proposed to separate a color signal into its components: illumination spectral power distribution and surface spectral reflectance. Most of these methods usually use a minimization technique from solely a single color signal, which works in theoretical framework but is not effective for real data. The reason is it lacks the constraints necessary to make the iterati...