Lecture 12 - Stanford Vision Lab

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What we will learn today• Local descriptors– SIFT– An assortment of other descriptors• Recognition and matching with local features(Problem Set 3 (Q3))– Matching objects with local features: David Lowe– Panorama stitching: Brown & Lowe– ApplicationsFei-Fei LiLecture 12 -385‐Nov‐11
Introduction• Are you getting the whole picture?– Compact Camera FOV = 50 x 35°Slide credit: Matthew BrownFei-Fei LiLecture 12 -395‐Nov‐11
Page 1 and 2: Lecture 12:Local Descriptors, SIFT&
Page 3: Local Descriptors• We know how to
Page 6 and 7: The Need for Invariance• Up to no
Page 8 and 9: Iterative Affine Adaptation1. Detec
Page 10 and 11: Affine Adaptation ExampleScale‐in
Page 12: Summary: Affine‐Inv. Feature Extr
Page 17 and 18: Feature Descriptors: SIFT• Scale
Page 19: Working with SIFT Descriptors• On
Page 22 and 23: Other local descriptors:Steerable f
Page 24 and 25: Other local descriptors:GLOHFei-Fei
Page 26 and 27: Other local descriptors:Geometric B
Page 28 and 29: http://www.robots.ox.ac.uk/~vgg/res
Page 30 and 31: What we will learn today• Local d
Page 32 and 33: Finding Consistent Configurations
Page 34 and 35: 3D Object Recognition• Gen. Hough
Page 36 and 37: Recognition Using View Interpolatio
Page 40 and 41: Introduction• Are you getting the
Page 42 and 43: Why “Recognising Panoramas”?•
Page 48 and 49: Why “Recognising Panoramas”?Sli
Page 50 and 51: Nearest Neighbor Matching of SIFT F
Page 52 and 53: Slide credit: Matthew BrownFei-Fei
Page 56 and 57: Probabilistic model for verificatio
Page 62 and 63: Error function• Sum of squared pr
Page 64 and 65: Bundle Adjustment• New images ini
Page 66 and 67: Multi‐band Blending• Burt & Ade
Page 68 and 69: Linear BlendingFei-Fei LiLecture 12
Page 72 and 73: Applications of Local Invariant Fea
Page 74 and 75: Recognition of Specific Objects, Sc
Page 76 and 77: References and Further Reading• M
Page 78 and 79: Supplementary materials• Matching
Page 80 and 81: Alignment Problem• We have previo
Page 82 and 83: What Can be Represented by a 22 Mat
Page 84 and 85: 2D Linear Transformsx ' a bxy' c
Page 86 and 87: 2D Affine Transformationx' ay' d
Page 88 and 89:
Fitting an Affine Transformation•
Page 90 and 91:
Fitting a Projective Transformation
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Uses: Analyzing Patterns and Shapes
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Lecture 12 - Stanford Vision Lab

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