Davies: Computer Vision, 5th edition: Solutions to selected problems 37
17.1
The complete table of pose ambiguities that arise for weak perspective projection, for
various numbers of object points identified in the image, is:
arrangement of
the points
N no. of ambiguities
with WPP
3 2
17.2
Full perspective projection is the normal case of perspective projection, and weak
perspective projection is the special case when a particular object is viewed and the depth
of the object Z is much less than its depth Z in the scene. In this situation, the image can
be thought of as being the result of orthographic projection in which the depth
