scholarly journals The assumed light direction for perceiving shape from shading

2008 ◽  
Author(s):  
James P. O'Shea ◽  
Martin S. Banks ◽  
Maneesh Agrawala
Keyword(s):  
Shape From Shading

A neurological dissociation between shape from shading and shape from edges

1996 ◽  
Vol 76 (1-2) ◽  
pp. 117-125 ◽  
Author(s):  
G. Keith Humphrey ◽  
Lawrence A. SymonS ◽  
Andrew M. Herbert ◽  
Melvyn A. Goodale
Keyword(s):  
Shape From Shading

scholarly journals Photometric stereo-based high-speed inline battery electrode inspection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Christian Kapeller ◽  
Ernst Bodenstorfer
Keyword(s):  
Quality Control ◽  
System Architecture ◽  
High Speed ◽  
Shape From Shading ◽  
Production Quality ◽  
Photometric Stereo ◽  
Inspection System ◽  
Coating Materials ◽  
Production Quality Control ◽  
Reconstruction Performance

Abstract Battery technology is a key component in current electric vehicle applications and an important building block for upcoming smart grid technologies. The performance of batteries depends largely on quality control during their production process. Defects introduced in the production of electrodes can lead to degraded performance and, more importantly, to short circuits in final cells, which is highly safety-critical. In this paper, we propose an inspection system architecture that can detect defects, such as missing coating, agglomerates, and pinholes on coated electrodes. Our system is able to acquire valuable production quality control metrics, like surface roughness. By employing photometric stereo techniques, a shape from shading algorithm, our system surmounts difficulties that arise while optically inspecting the black to dark gray battery coating materials. We present in detail the acquisition concept of the proposed system architecture, and analyze its acquisition-, as well as, its surface reconstruction performance in experiments. We carry these out utilizing two different implementations that can operate at a production speed of up to 2000 mm/s at a resolution of 50 µm per pixel. In this work we aim to provide a system architecture that can provide a reliable contribution to ensuring optimal performance of produced battery cells.

Top-down effect on pupillary response: Evidence from shape from shading

Cognition ◽  
2021 ◽  
Vol 212 ◽  
pp. 104664
Author(s):  
Ayelet Sapir ◽  
Ronen Hershman ◽  
Avishai Henik
Keyword(s):  
Shape From Shading ◽  
Pupillary Response ◽  
Top Down

scholarly journals Ultra-High-Resolution 1 m/pixel CaSSIS DTM Using Super-Resolution Restoration and Shape-from-Shading: Demonstration over Oxia Planum on Mars

2021 ◽  
Vol 13 (11) ◽  
pp. 2185
Author(s):  
Yu Tao ◽  
Sylvain Douté ◽  
Jan-Peter Muller ◽  
Susan J. Conway ◽  
Nicolas Thomas ◽  
...  
Keyword(s):  
High Resolution ◽  
3D Reconstruction ◽  
Imaging System ◽  
Processing System ◽  
Digital Terrain Model ◽  
Super Resolution ◽  
Landing Site ◽  
Shape From Shading ◽  
Stereo Pair ◽  
Terrain Model

We introduce a novel ultra-high-resolution Digital Terrain Model (DTM) processing system using a combination of photogrammetric 3D reconstruction, image co-registration, image super-resolution restoration, shape-from-shading DTM refinement, and 3D co-alignment methods. Technical details of the method are described, and results are demonstrated using a 4 m/pixel Trace Gas Orbiter Colour and Stereo Surface Imaging System (CaSSIS) panchromatic image and an overlapping 6 m/pixel Mars Reconnaissance Orbiter Context Camera (CTX) stereo pair to produce a 1 m/pixel CaSSIS Super-Resolution Restoration (SRR) DTM for different areas over Oxia Planum on Mars—the future ESA ExoMars 2022 Rosalind Franklin rover’s landing site. Quantitative assessments are made using profile measurements and the counting of resolvable craters, in comparison with the publicly available 1 m/pixel High-Resolution Imaging Experiment (HiRISE) DTM. These assessments demonstrate that the final resultant 1 m/pixel CaSSIS DTM from the proposed processing system has achieved comparable and sometimes more detailed 3D reconstruction compared to the overlapping HiRISE DTM.

Use of shape-from-shading to estimate three-dimensional architecture in the small intestinal lumen of celiac and control patients

2013 ◽  
Vol 111 (3) ◽  
pp. 676-684 ◽  
Author(s):  
Edward J. Ciaccio ◽  
Christina A. Tennyson ◽  
Govind Bhagat ◽  
Suzanne K. Lewis ◽  
Peter H.R. Green
Keyword(s):  
Three Dimensional ◽  
Shape From Shading ◽  
Intestinal Lumen ◽  
Small Intestinal ◽  
And Control
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