Annotation BRUTE Forum Schedule Students: CZ EN | MS Teams

Geometry of Computer Vision and Graphics 2021

A reconstruction

He who loves practice without theory is like the sailor who boards a ship without a rudder and compass and never knows where he may cast. — Leonardo Da Vinci (1452-1519)

And since geometry is the right foundation of all painting, I have decided to teach its rudiments and principles to all youngsters eager for art. — Albrecht Durer (1471-1528)

As for everything else, so for a mathematical theory: beauty can be perceived but not explained. — Arthur Cayley (1821–1895)

We will explain Euclidean, Affine, and Projective geometry basics, introduce a model of the perspective camera, and explain how images change when moving a camera. We will show how to compute camera poses and the 3D scene geometry from images. We will demonstrate the theory in practical panorama construction tasks, finding the camera pose, adding a virtual object to a real scene, and reconstructing a 3D model of a scene from its images. We will build on our previous knowledge of linear algebra and provide fundamentals of geometry for computer vision, computer graphics, augmented reality, image processing, and object recognition.

Lectures [Monday 12:45-14:15 Online]

Tomas Pajdla, Torsten Sattler: Online Lectures via MS Teams

WeekDateLecture T Pajdla. Elements of Geometry for Computer Vision and Computer Grahics
01 15.2. TP: Geometry of CV & CG S V, LA [Sec. 2.1] S V, Image coordinate system [Sec. 5] V
02 22.2. TP: Mathematical model of the perspective camera [Sec. 6], Kronecker product [Sec. 2.5] S V1 V2 V3
03 01.3. TP: Camera calibration and pose [Sec. 7.1] S V1 V2
04 08.3. TP: Vector product [Sec. 2.2, 2.3], Calibrated camera pose computation [Sec. 7.2, 7.3] S V
05 15.3. TP: Homography [Sec. 8.1-8.5] S V1 V2
06 22.3. TS: Image based camera localization S V1 V2 V3
07 29.3. TS: Projective plane [Sec. 9.1-9.2] S V
05.4. Easter Monday
08 12.4. TP: Vanishing points & line [Sec. 9.4, 9.5] projective space [Sec. 10] camera autocalibration [Sec. 11] S V
09 19.4. TP: Dual space [Sec. 2.4] lines under homography [Sec. 9.3] S0 S1 V
10 26.4. TS: Epipolar geometry [Sec. 12.1-12.2] S0 S1 V
11 03.5. TP: 3D reconstruction with a calibrated camera [Sec. 12.3, 12.4] S0, S1, V
12 10.5. TP: Calibrated camera motion computation [Sec. 12.5] S0, S1, V
13 17.5. TS: 3D Reconstruction pipelines

Labs [Monday 14:30-16:00, 16:15-17:45 Online]

Assessment

  1. All homework must be submitted via BRUTE and accepted.
  2. At least 50% of points in total for the homework.
  3. At least 50% of points in total from the tests.
  4. Regular submission of homework ends on May 24, 2021. Later submissions are possible only by an agreement with the assistants.
  5. All the above conditions have to be fulfilled, and the results have to be recorded in the Submission system before the exam.

Exam

The exam consists of a written and an oral part. It is required to achieve at least 50% of points from the written exam to be admitted to the oral exam. The grade depends on the exam (40%), tests (30%), and homework (30%).

Exam content:

  1. Linear algebra [4,5,6,7]: linear space, basis, coordinates, linear dependence/independence, matrices, rank, determinant, eigenvalues and eigenvectors, solving systems of linear equations, Frobenius theorem and linear independence, linear function, affine function, linear mapping and its matrix, computing roots of a polynomial via eigenvalues of its companion matrix, dual space, dual basis, change of the dual basis corresponding to a change of a basis, vector product and derived linear mappings, SVD, dual space, and dual basis.

Rules

  1. Lecture: It is very difficult to pass the course without attending online lectures.
  2. Labs: It is impossible to pass the course without attending online labs.
  3. Homework: Homework is assigned at a lab where it can be discussed with teaching assistants. Students work out homework individually (rulesin Czech). The deadline for submitting homework via BRUTE is on Monday at 6:00 in the morning two weeks after the assignment. Late submissions are penalized (10% for each commenced day of delay but not more than 50% of points).
  4. Assessment: see above.
  5. Tests: Students take tests individually.

Literature

  1. R Hartley, A Zisserman Multiple View Geometry in Computer Vision Cambridge University Press, 2003
  2. G Sanderson Essence of Linear Algebra from 3Blue1Brown
  3. J Strom, K Astrom, T Akenine-Moller Interactive Linear Algebra Course
  4. P Pták Introduction to Linear Algebra ČVUT 2007

Contacts

courses/gvg/start.txt · Last modified: 2021/05/10 12:36 by pajdla