Transcription of CS231A Course Notes 3: Epipolar Geometry
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CS231A Course Notes 3: Epipolar Geometry
CS231A Course Notes 3: Epipolar GeometryKenji Hata and Silvio Savarese1 IntroductionPreviously, we have seen how to compute the intrinsic and extrinsic param-eters of a camera using one or more views using a typical camera calibrationprocedure or single view metrology. This process culminated in derivingproperties about the 3D world from one image . However, in general, it is notpossible to recover the entire structure of the 3D world from just one is due to the intrinsic ambiguity of the 3D to the 2D mapping: someinformation is simply 1: A single picture such as this picture of a man holding up theLeaning Tower of Pisa can result in ambiguous scenarios. Multiple views ofthe same scene help us resolve these potential example, in Figure 1, we may be initially fooled to believe that theman is holding up the Leaning Tower of Pisa.
2 and the image point p, we can de ne the epipolar plane. With this epipolar plane, we can then determine the epipolar lines1. By de nition, P’s projection into the second image p0must be located on the epipolar line of the second image. Thus, a basic understanding of epipolar geometry allows us to create a strong constraint between image ...
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