Page 5 - 3DF Zephyr

3Dflow pushed a lot of effort to make Zephyr's interface as more user friendly as possible. However, if you want to get the best results, please spend a few minutes reading the hints and tips you will find in this documentation. This guide is intended for all the different versions of 3DF Zephyr unless stated otherwise. In the next section, we will quickly review the reconstruction process. It is not mandatory to fully understand the "magic" behind zephyr, but a quick review of the main concepts can be useful. A Quick Overview Here in 3Dflow we are, first of all, Computer Vision researchers. Computer Vision is, generally speaking, the science that studies how to extract (any kind of useful) information starting from images. This is a very rough definition and many subproblem can be delineated and many different meanings for the concept of "information" can be given. Extracting three-dimensional models from a number of images (extracting 3D information from a 2D input) is a well studied problem in Computer Vision. 3DF Zephyr represents an highly refined and well engineered solution for this problem. There are four main phases in Zephyr:  Starting a new project and defining the camera pose - this is also referred as 'Structure from Motion'  Extracting a Dense Point Cloud - this is also referred as 'Multi-View Stereo'  Extracting a Surface  Extracting a Textured Mesh When starting a new project the software will extract the camera positions and orientations and their internal parameters (i.e. the focal lenght and other camera properties). The first are referred as external parameters, while the latter are called internal parameters. All the magic of this phase is done by Samantha, our leading Structure from Motion Technology. If you want to input the internal camera parameters