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Author Waldon, Stephen ♦ Dyer, Charles R.
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Qualitative Shape Recovery Problem ♦ Parabolic Curve ♦ Specular Surface ♦ Reflection Flow Field ♦ Reflection Point ♦ Qualitative Shape Recovery ♦ Kinematic Analysis ♦ Dynamic Shading ♦ Flow Measurement Technique ♦ Specular Interreflection ♦ Qualitative Shape ♦ Motion Parallax ♦ Reliable Qualitative Shape Information ♦ Reflection Flow ♦ Image Flow Field ♦ Reflected Image
Description We address the problem of qualitative shape recovery from moving surfaces. Our analysis is unique in that we consider specular interreflections and explore the effects of both motion parallax and changes in shading. To study this situation we define an image flow field called the reflection flow field, which describes the motion of reflection points and the motion of the surface. From a kinematic analysis, we show that the reflection flow is qualitatively different from the motion parallax because it is discontinuous at or near parabolic curves. We also show that when the gradient of the reflected image is strong, gradientbased flow measurement techniques approximate the reflection flow field and not the motion parallax. We conclude from these analyses that reliable qualitative shape information is generally available only at discontinuities in the image flow field. 1 Introduction We consider the qualitative shape recovery problem for a moving specular surface surrounded by multiple o...
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 1993-01-01
Publisher Institution Proceedings of the IEEE Workshop on Qualitative Vision