Photometric stereo for strong specular highlights
نویسندگان
چکیده
منابع مشابه
Specular Stereo
A glossy highlight, viewed stereoscopically, can provide information about surface shape. For example, highlights appear to lie behind convex surfaces but in front of concave ones. A highlight is a distorted, reflected image of a light source. A ray equation is developed to predict the stereo disparities generated when a point source of light is reflected in a smooth, curved surface. This equat...
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In Photometric stereo, the existence of specularities hampers to recover the normal map. To deal with this common reflective phenomenon, we introduce a novel representation for specular reflection with a set of specular basis functions with different roughness values. This representation is suitable for any intensively or weakly specular object, and is introduced into the photometric stereo alg...
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The problem of accurate depth estimation using stereo in the presence of specular reeection is addressed. Specular reeection, a fundamental and ubiquitous reeection mechanism, is viewpoint dependent and can cause large intensity diierences at corresponding points, resulting in signiicant depth errors. We analyze the physics of specular reeection and the geometry of stereopsis which lead to a re...
متن کاملEliminating Aliasing of Specular Highlights
The result of averaging or interpolating unit normals is less than unit length unless all normals within the footprint happen to be identical. Most algorithms simply renormalize, but this paper explores how the shortening can be used as a measure of normal variation to eliminate the common problem of strobing/sparkling noise due to aliasing of specular highlights. Figure 1. With aliasing (left)...
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An integral part of computer graphics, machine vision and human vision understanding is modeling how a surface reflects light. There is a substantial body of work on models describing surface reflectance ranging from purely matte to purely specular. One of the advantages of diffuse reflectance is that the color and the intensity of the reflected light are separable for most materials. Color is ...
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ژورنال
عنوان ژورنال: Computational Visual Media
سال: 2018
ISSN: 2096-0433,2096-0662
DOI: 10.1007/s41095-017-0101-9