3,4,N view geometry
• Trifocal tensor (3 view geometry)
[Hartley ’97][Torr & Zisserman ’97][ Faugeras ’97]
• Quadrifocal tensor (4 view geometry) [Triggs ’95]
• Multiview tensors [Hartley’95][ Hayden ‘98]
 There is no additional constraint between more than 4 images. All the constraints
can be expressed using F,triliear tensor or quadrifocal tensor.