  This paper propose a interactive 3D modeling method and corresponding system
based on single or multiple uncalibrated images. The main feature of this
method is that, according to the modeling habits of ordinary people, the 3D
model of the target is reconstructed from coarse to fine images. On the basis
of determining the approximate shape, the user adds or modify projection
constraints and spatial constraints, and apply topology modification, gradually
realize camera calibration, refine rough model, and finally complete the
reconstruction of objects with arbitrary geometry and topology. During the
interactive process, the geometric parameters and camera projection matrix are
solved in real time, and the reconstruction results are displayed in a 3D
window.
