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Scene planes and homographies
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Homographies given the plane and vice versa
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Proof of result 12.1
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Example 12.2 A calibrated stereo rig
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A calibrated stereo rig 2
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A calibrated stereo rig 3
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The homography induced by a plane Fig.12.1
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Fig 12.1 Legend
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Homographies compatible with epipolar Geometry
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Two sets of 4 arbitrary points from 2 images
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Epipolar geometry define conditions on homographies
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Counting degrees of freedom
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Compatibility constraints Fig.12.2 a e’ = H e
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Compatibility constraints 2 Fig. 12.2 b H T l e ’ = l e
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Compatibility constraints 3 Fig. 12.2 c
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Fig 12.2 Compatibility constraints
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Result 12.3
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Homographies are compatible with fundamental matrix
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Corollary 12.4
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Result 12.5
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13.6 Plane induced homographies given F and image correspondences: (a) 3 points, (b) a line and a point
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12.2.1 Three points
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Three points
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The first (explicit) method is preferred
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Degenerate geometry for an implicit computation of the homography Fig. 12.3
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Fig. 12.3 Legend
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Determining the points X i is not necessary in first method All that is important
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Result 12.6
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Proof
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Proof 2
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Consistency conditions
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Consistency conditions 2
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Algorithms 12.1 The optimal estimate of homography induced by a plane defined by 3 points
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12.2.2 A point and line
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A one parameter family of homographies Fig 12.4 (a), (b)
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Fig 12.4 Legend
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Result 12.7
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Proof of result 12.7
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Proof of result 12.7 (2)
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Proof of result 12.7 (3)
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Result 12.8
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Result 12.8 2
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Geometric interpretation of the point map H( Explore the
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A homography between corresponding line images Fig. 12.5
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Fig. 12.5 Legend
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Degenerate homographies
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Degenerate homographies 2
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A degenerate homography Fig. 12.6
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Fig. 12.6 Legend
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12.3 Computing F given the homography induced by a plane
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Plane induced parallax
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Plane induced parallax Fig. 12.7
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Fig. 12.7 Legend
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Plane induced parallax 2 Fig. 12.8
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Fig. 12.8 Legend
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Plane induced parallax 2
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Algorithm 12.2 Computing F given the correspondence of 6 points, 4 of which are coplanar
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Fundamental matrix from 6 points of which 4 are coplanar Fig. 12.9
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Fig. 12.9 Legend
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Projective Depth
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Example 12.9
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Binary space partition: left and right images Fig. 12.10 a,b
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(c ) Points with known correspondence (d) A triplet of points selected from ( c ) and this triplet defines a plane Fig. 12.10 c,d
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(e) Points on one side of the plane (f) Points on the other side Fig. 12.10 e, f
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Fig 12.10 Legend
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Two planes
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Two planes 2
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The action of the map H = H 2 -1 H 1 on x Fig. 12.11
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Fig. 12.11 Legend
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Two planes 3 Up to this points, the results of this chapter have been entirely projective
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12.4 The infinite homography H inf
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The infinite homography H inf 2
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The infinite homography H inf 3
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Vanishing points and lines
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The infinite homography H inf maps vanishing points between images Fig. 12.12
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Affine and metric reconstruction
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Affine and metric reconstruction 2
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Affine and metric reconstruction 3
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Stereo Correspondence
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Reducing the search region using H inf Fig 12.13
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Fig. 12.13 Legend
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