Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"Photometric Stereo"”.
-
Photometric stereo for micro-scale shape reconstruction
… for 3D micro-scale shape reconstruction using photometric stereo (PS) with surface normal integration (SNI). Based on the proposed approach, a portable cost-effective stationary system is developed to capture 3D shapes in the order of micrometer scale. The PS with SNI technique is adopted to …
-
Detailed and Practical 3D Reconstruction with Advanced Photometric Stereo Modelling
… materials are particularly hard to reconstruct. Photometric Stereo (PS), which operates by capturing multiple images under changing illumination has traditionally been one of the most successful techniques at recovering a large amount of surface details, by exploiting the relationship between …
-
Image-based 3D metrology of non-collaborative surfaces
… of non-collaborative objects using the proposed photometric stereo image acquisition system. The first proposed method employs geometric construction to integrate photogrammetry and photometric stereo in order to overcome each technique's limitations and to leverage each technique's strengths in …
-
Face Shape and Reflectance Acquisition using a Multispectral Light Stage
… the analysis of the original spherical gradient photometric stereo method to study the effects of deformed diffuse lobes on the quality of recovered surface normals. Based on our modified radiance equations, we develop a minimal image set method to recover high quality photometric normals using …
-
Design and Manufacturing Methods for a Curved All-Around Camera-Based Tactile Sensor
… we build off previous GelSight sensors’ photometric stereo lighting methods to develop an orthogonal, cross-shaped illumination structure that has the potential to be transferred to different curved sensor geometries (with some changes to the lighting and camera parameters required). By …
-
Viewpoint invariant surface reconstruction from gradient data
… Experiments are performed with real data from photometric stereo in the context of building 3D object models by fitting together surfaces reconstructed from multiple views. Viewpoint invariance is important in order for the different surfaces to fit together. Multiple views of a simple …
-
Orientation-based representations of shape and attitude determination
… on real objects using surface data derived from photometric stereo. Experimental results verify the theoretical solutions. Novel contributions of the thesis include: the representation of smooth convex objects by the support function and curvature functions; the definition of a new …
-
Applications of low-rank matrix recovery methods in computer vision
… and see how PCP can be used effectively in the photometric stereo problem. We then extend the existing PCP framework in a non-trivial fashion to effectively handle domain transformations in images. The proposed ideas are used to align multiple images simultaneously with one another, as well as …
-
Circumferential Three-Dimensional Profiling with Specular Micro-Texture Photometry for Dark Objects
… appearance under different illumination. This photometric property can be used to reconstruct the target surface with pixel-level resolution. However, due to the nature of some material, the surface of whom has stronger specular components than diffuse components, making the usage of general …