Calibrating zooming cameras from multiple images without feature extraction

W. Brent Seales; David W. Eggert

doi:10.1117/12.189062

6 October 1994 Calibrating zooming cameras from multiple images without feature extraction

W. Brent Seales, David W. Eggert

Proceedings Volume 2355, Sensor Fusion VII; (1994) https://doi.org/10.1117/12.189062
Event: Photonics for Industrial Applications, 1994, Boston, MA, United States

Abstract

This work presents a new approach to the problem of calibrating a zoomable camera. The calibration of zooming cameras is central for tasks which employ zoom to improve feature detection and correspondence, such as 3D stereo reconstruction. Our method solves for the parameters of a camera model using a global optimization technique on a sequence of images of a known calibration target obtained for different mechanical zoom settings. This approach addresses two primary weaknesses in classical camera calibrations. First, the process avoids the difficulties of explicit feature detection. Feature localization is instead included as part of the error measure used in the optimization. Second, images are not calibrated independently, as in previous efforts. Rather, the optimization process considers all images simultaneously, representing the final calibrated camera as a function of zoom. We compute a starting point for the optimization using the measured mechanical zoom settings for the images, and certain features identified by either a high-level process or a human operator. This paper describes the details of our approach, showing initial experimental results on real data.

Citation Download Citation

W. Brent Seales and David W. Eggert "Calibrating zooming cameras from multiple images without feature extraction", Proc. SPIE 2355, Sensor Fusion VII, (6 October 1994); https://doi.org/10.1117/12.189062

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available