Bài giảng Nhập môn thị giác máy tính - Chapter 3: Camera calibration - Lê Thanh Hải

Chapter 3 – Camera Calibration  
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Chapter 3  
Camera Calibration  
Prof. Fei-Fei Li, Stanford Univers ity  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Contents  
• Review camera parameters  
• Affine camera model  
• Camera calibration  
• Vanishing points and lines  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Projective camera  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Projective camera  
K has 5 degrees of freedom  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Projective camera  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Projective camera  
D
Chapter 3 – Camera Calibration  
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Projective camera  
Chapter 3 – Camera Calibration  
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Projective camera  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Projective camera  
fk 0 u  
0   
u
K 0 fkv v0  
Department of Mechatronics   
0 0 0  
Chapter 3 – Camera Calibration  
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Goal of calibration  
Department of Mechatronics  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Hierarchy of cameras  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Examples of camera projections  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Affine cameras  
De
Chapter 3 – Camera Calibration  
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Homogenous coordinate  
• Our usual coordinate system is called a Euclidean  
or affine coordinate system.  
• Rotation, translation and projection in homogenous  
coordinate can be expressed linearly as matric  
multiplies.  
Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Chapter 3 – Camera Calibration  
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Department of Mechatronics  
Chapter 3 – Camera Calibration  
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Department of Mechatronics  
Chapter 3 – Camera Calibration  
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• Projective geometry provides an elegant means for  
handling these different situations in a unified way and  
homogenous coordinates are a way to represent entities  
(points and lines) in projective spaces.  
Department of Mechatronics  
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