Overview

Point Matching is the process of identifying corresponding points in a pair of images (2D projections) of a three-dimensional object.

In Softface 3D, the three-dimensional object is a human face, and the projections are the two different photographs of that face.

As you can see in the right figure, a three-dimensional vertex can be computed with the 2D coordinates of his two projections. Of course another important information is needed: the position and orientation from which both photographs were taken.

Softface 3D can compute the position and orientation of the cameras if you provide 10 or more point matches. This process is called Rendering and produces a first version of the 3D model.

After the Rendering process you can provide more point matches to improve the resemblance of the 3D model.

Note that adding point matches after the Rendering process is easier because Softface 3D will tell you in which line of the image should be positioned the corresponding point (see the figure below).

There are two ways for adding point matches to a project, you can provide matches manually (by clicking corresponding points) or let Softface 3D to find point matches for you (Automatic Matching). The automatic process does not guarantee a 100% success.

Automatic Matching is not available in Softface 3D Lite.

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