Suppose we use a single conventional camera as the only sensing
element and a single mirror as the only reflecting surface. If the
camera is an ideal perspective camera and we ignore defocus blur, it
can be modeled by the point through which the perspective projection is
performed; i.e. the *effective pinhole*. Then, the fixed
viewpoint constraint requires that each ray of light passing through
the effective pinhole of the camera (which was reflected by the mirror)
would have passed through the effective viewpoint if it had not been
reflected by the mirror.

- Derivation of the Fixed Viewpoint Constraint Equation
- General Solution of the Constraint Equation
- Specific Solutions of the Constraint Equation