DocumentCode :
2387058
Title :
Registration, calibration and blending in creating high quality panoramas
Author :
Xiong, Yalin ; Turkowski, Ken
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
fYear :
1998
fDate :
19-21 Oct 1998
Firstpage :
69
Lastpage :
74
Abstract :
This paper presents a system for creating a full 360-degree panorama from rectilinear images captured from a single nodal position. The solution to the problem is divided into three steps. The first step registers all overlapping images projectively. A combination of a gradient-based optimization method and a correlation-based linear search is found to be robust even in cases of drastic exposure differences and small amount of parallax. The second step takes the projective matrices and their associated hessian matrices as inputs, and calibrates the internal and external parameters of every image through a global optimization. The objective is to minimize the overall image discrepancies in all overlap regions while converting projective matrices into camera parameters such as focal length, aspect ratio, image center, 3D orientation, etc. The third step re-projects all images onto a panorama by a Laplacian-pyramid-based blending. The purpose of blending is to provide a smooth transition between images and eliminate small residues of misalignments resulting from parallax or imperfect pairwise registrations. The blending masks are generated automatically through the grassfire transform. At the end, we briefly explain the necessary human interface for initialization, feedback and manual options
Keywords :
Hessian matrices; calibration; optimisation; stereo image processing; 3D orientation; Laplacian-pyramid-based blending; aspect ratio; blending; blending masks; calibration; camera parameters; correlation-based linear search; feedback; focal length; global optimization; gradient-based optimization; grassfire transform; hessian matrices; high quality panoramas; human interface; image center; image registration; initialization; manual options; overlapping images; projective matrices; rectilinear images; Calibration; Cameras; Feedback; Humans; Image converters; Laboratories; Matrix converters; Optimization methods; Propulsion; Robustness;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applications of Computer Vision, 1998. WACV '98. Proceedings., Fourth IEEE Workshop on
Conference_Location :
Princeton, NJ
Print_ISBN :
0-8186-8606-5
Type :
conf
DOI :
10.1109/ACV.1998.732860
Filename :
732860
Link To Document :
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