The Recognition of Three-Dimensional Translational Motion of an Object by a Fixed Monocular Camera

Viet HUYNH QUANG HUY  Michio MIWA  Hidenori MARUTA  Makoto SATO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E87-A   No.9   pp.2448-2458
Publication Date: 2004/09/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: Vision
in-focus frame,  multi-focus image sequence,  multi-focus background image sequence,  multi-focus subject image sequence,  in-focus frame tracking operator,  field of motion vision,  non-uniform sampling,  

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In this paper, we propose a fixed monocular camera, which changes the focus cyclically to recognize completely the three-dimensional translational motion of a rigid object. The images captured in a half cycle of the focus change form a multi-focus image sequence. The motion in depth or the focus change of the camera causes defocused blur. We develop an in-focus frame tracking operator in order to automatically detect the in-focus frame in a multi-focus image sequence of a moving object. The in-focus frame gives a 3D position in the motion of the object at the time that the frame was captured. The reconstruction of the motion of an object is performed by utilizing non-uniform sampling theory for the 3D position samples, of which information were inferred from the in-focus frames in the multi-focus image sequences.