Author/Editor		Gardel, Alfredo; Lazaro, Jose Luis; Lavest, Jean Marc
Title		Influence of mechanical errors in a zoom camera
Type		članek
Source		Image Anal Stereol
Vol. and No.		Letnik 20, št. Suppl 1
Publication year		2001
Volume		str. 533-7
Language		eng
Abstract		As it is known, varying the focus and zoom of a camera lens system changes the alignment of the lens components what causes the image centre and field of view to shift. Thus, know how the image centre shifts could be important for some aspects of camera calibration. As it is shown in other papers, the pin-hole model using thin lenses is not adequate for zoom lenses. To ensure a model calibration as the lens parameters are varied, the z coordinates of the model must be adjusted to compensate for shifts in the camera's field of view. Taking this into account we have realized the geometrical modelling of a zoom lens, having its lens specifications. Below, some figures describes the errors obtained in the principal point coordinates and also in its standard deviation, for both directions: vertical and horizontal, and the direct application to the calibration process.
Descriptors		PATTERN RECOGNITION CALIBRATION IMAGE PROCESSING, COMPUTER-ASSISTED