Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization...
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Transcript of Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization...
![Page 1: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/1.jpg)
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SIFT
Scale-Invariant-Feature-Transform
Stages• Scale-Space Extrema Detection• Keypoint Localization• Orientation Assignment• Keypoint Descriptor
![Page 2: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/2.jpg)
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Scale-Spaces & Extrema
[Lo04]
![Page 3: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/3.jpg)
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Scale-Spaces
[L2]
![Page 4: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/4.jpg)
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Keypoint Localization
[Lo04]
![Page 5: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/5.jpg)
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Orientation & Descriptor
[Lo04]
![Page 6: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/6.jpg)
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Orientation & Descriptor
[Lo04]
![Page 7: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/7.jpg)
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Orientation & Descriptor „Orientation Histograms“ Länge der Vektoren
entspricht…• …der Summe der
Gradientengrößen…• …in die jeweilige
Richtung…• …in der jeweiligen Region.
[Lo04]
![Page 8: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/8.jpg)
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Pipeline Überblick
[L1]
![Page 9: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/9.jpg)
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Was nun?
Nutzung eines der OpenCV *Matcher…• …solange Code die Kompatibilität zu OpenCV
Feature2D Standardinterfaces gewährleistet
„Nearest Neighbour“ mit minimaler euklidischer Distanz empfohlen
![Page 10: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/10.jpg)
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SIFT in Aktion
[Lo04]
![Page 11: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/11.jpg)
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SIFT in Aktion
[Lo04]
![Page 12: Scale-Invariant-Feature-Transform Stages Scale-Space Extrema Detection Keypoint Localization Orientation Assignment Keypoint Descriptor 1.](https://reader035.fdocument.pub/reader035/viewer/2022062623/55204d7549795902118c9f30/html5/thumbnails/12.jpg)
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Quellen [L1] aishack.com [L2]
wwwisg.cs.uni-magdeburg.de/bv/index.php?article_id=23&clang=0• Arbeitsgruppe
Bildverarbeitung, Bildverstehen
[Lo04] • David G. Lowe• Distinctive Image Features
from Scale-Invariant Keypoints (2004)