کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
735361 893604 2007 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Axial stereo-photogrammetry for 360° measurement on tubular samples
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Axial stereo-photogrammetry for 360° measurement on tubular samples
چکیده انگلیسی

This work presents a stereo-photogrammetry (SP) based procedure to perform whole-body measurements on tubular samples. Such a system is designed for future applications to the study of vascular wall mechanics. The use of a concave conical mirror surrounding the specimen makes it possible to capture the reflected 360° surface with a single snapshot moving neither cameras nor object. Then, according to 3-D computer vision principles, a stereo camera system retrieves control points depth information from image-pairs of the investigated surface. An axial-SP arrangement is selected since is more suitable for this specific application than the more popular lateral-stereo model.In this paper, particular emphasis is given to a formulation taking into account even small camera misalignments. A calibration process based on optimization concepts is used together with a feature-based matching algorithm to efficiently find correspondence between highly distorted images reflected by the conical mirror.Both theoretical and experimental analyses on calibrated samples demonstrated feasibility and accuracy of the proposed procedure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 45, Issue 5, May 2007, Pages 637–650
نویسندگان
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