Performance Evaluation of Digital Zoom Setting in Close Range Photogrammetry and Its Application

Abstract

With the spread of the digital cameras with integrated the zoom lens, in particular long range such as ×30, digital close range photogrammetry using the cameras is enormously expected in various application fields. In these circumstances, the authors have been concentrating on developing a calibration model for the zoom lens, and the model shown the capability to perform camera calibration with stable for all zoom setting. However, there is still problem for effective digital photogrammetry using the cameras, in particular close range photogrammetry using digital zoom setting. The main problem is instability of calibration procedure in digital zoom setting.
In order to resolve instability of digital zoom setting, and practical use of digital close range photogrammetry by digital zoom setting, performance evaluation of digital zoom setting was conducted using 3 kinds of digital camera with integrated the zoom lens (×3.6～30) with digital zoom setting (×4～6.25) in this paper.