Paper Info
Title
Improving 3D surface reconstruction from endoscopic video via fusion and refined reflectance modeling.
Abstract
Shape from shading (SFS) has been studied for decades; nevertheless, its overly simple assumptions and its ill-conditioning have resulted in infrequent use in real applications. Price et al. recently developed an iterative scheme named shape from motion and shading (SFMS) that models both shape and reflectance of an unknown surface simultaneously. SFMS produces a fairly accurate, dense 3D reconstruction from each frame of a pharyngeal endoscopic video, albeit with inconsistency between the 3D reconstructions of different frames. We present a comprehensive study of the SFMS scheme and several improvements to it: (1) We integrate a deformable registration method into the iterative scheme and use the fusion of multiple surfaces as a reference surface to guide the next iteration's reconstruction. This can be interpreted as incorporating regularity of a frame's reconstruction with that of temporally nearby frames. (2) We show that the reflectance model estimation is crucial and very sensitive to noise in the data. Moreover, even when the surface reflection is not assumed to be Lambertian, the reflectance model estimation function in SFMS is still overly simple for endoscopy of human tissue. By removing outlier pixels, by preventing unrealistic BRDF estimation, and by reducing the falloff speed of illumination in SFS to account for the effect of multiple bouncing of the light, we improve the reconstruction accuracy.
Year
DOI
Venue
2017
10.1117/12.2254587
Proceedings of SPIE
Field
DocType
Volume
Bidirectional reflectance distribution function,Computer vision,Surface reconstruction,Reference surface,Optics,Outlier,Artificial intelligence,Pixel,3D modeling,Photometric stereo,Physics,3D reconstruction
Conference
10133
ISSN
Citations 
PageRank 
0277-786X
1
0.35
References 
Authors
7
6
Name
Order
Citations
PageRank
Rui Wang1855.98
True Price2555.07
Qingyu Zhao3102.31
Jan-Michael Frahm42847141.20
Julian G. Rosenman551.48
Stephen M. Pizer62000262.21