COMPUTER VISION E DEEP LEARNING

Insegnamento
COMPUTER VISION E DEEP LEARNING
Insegnamento in inglese
COMPUTER VISION AND DEEP LEARNING
Settore disciplinare
ING-INF/03
Corso di studi di riferimento
INGEGNERIA INFORMATICA
Tipo corso di studio
Laurea Magistrale
Crediti
9.0
Ripartizione oraria
Ore Attività Frontale: 81.0
Anno accademico
2022/2023
Anno di erogazione
2023/2024
Anno di corso
2
Lingua
ITALIANO
Percorso
Intelligenza artificiale
Docente responsabile dell'erogazione
DISTANTE Cosimo
Sede
Lecce

Descrizione dell'insegnamento

No prior experience with computer vision is assumed, although previous knowledge of visual computing or signal processing will be helpful. The following skills are necessary for this class:

  • Math: Linear algebra, vector calculus, and probability. Linear algebra is the most important.
  • Data structures: Students will write code that represents images as feature and geometric constructions.
  • Programming: A good working knowledge. All lecture code and project starter code will be Python, and Pytorch for Deep Learning, but student familiar with other frameworks such as tensorflow is ok. 

Computer Vision today is everywhere in our society and images have become pervasive, with applications in several sectors; just to mention some in: apps, drones, healthcare and precision medicine, precision agricolture, searching, understanding, control in robotics and self-driving cars.

The course introduces the basics of image formation, reconstruction and inferring motion models, as well as camera calibration theory and practice.

Recent developments in neural networks (Deep Learning) have considerably boosted the performance of the visual recognition systems in tasks such as: classification, localisation, detection, segmentation etc. Students will learn the building blocks of a general convolutional neural network, the way how it is trained and optimized, how to prepare a dataset and how to measure the final performance.

Upon completion of this course, students will:

  1. Be familiar with both the theoretical and practical aspects of computing with images;
  2. Have described the foundation of image formation, measurement, and analysis;
  3. Have implemented common methods for robust image matching and alignment;
  4. Understand the geometric relationships between 2D images and the 3D world;
  5. Have gained exposure to object and scene recognition and categorization from images;
  6. Grasp the principles of state-of-the-art deep neural networks; and
  7. Developed the practical skills necessary to build computer vision applications.

Teaching is based on theoretical and practical lectures. The student will write in python algorithms taught in class

Oral session. The student will explain the developed project and shall answer two or more questions regarding theoretical aspects of the studied topics

The student must develop a project by choosing a practical simple application with some algorithms done during the course. The choice is at total disposal of the student, as well as the fact of developing it in group os solo. In group setting the students must proof their own activities developed in the common project application.

The final examination is based on oral assessment of the topics covered during lectures.

For the LAB practice, students may use for the deep learning development the Google Colab or Cloud Platform.

Introduction to Computer Vision

Camera models and colors

Image Filtering

Fourier - image pyramids and blending

Detecting Corners

2D and 3D geometric primitives - Projections

Operations with images

Image Alignment - warping, homography estimation direct linear transform robust motion estimation with Ransac - perspective n point problem. Registration examples: face recognition, medical imaging

Camera Calibration - distortion models and compensations - linear methods for camera parameters. Calibration with a checkerboard

LAB - SIFT and camera calibration

Multiview geometry - Epipolar geometry, position error estimation, stereo rig, Essential matrix estimation, rectification, Reconstruction, correspondense problem, weak calibration and ransac estimation of fundamental matrix

Image Classification - Key nearest neighbor, linear classifiers

LAB - Canny edge detection, Hough Transform

Image Classification - loss functions, optimization with stochastic gradient descent

neural networks

LAB - Introduction to Pytorch framework

backpropagation, computational graphs and gradient estimation

Image Classification - Convolutional Neural Network architecture

Normalization; Image Classification - CNN architectures (Alexnet, VGG, GoogleNet, ResNET, DenseNet, SENet, EfficientNet), Siamese Architectures (applications to face verification, people and vehicle re-identification)

LAB - CNN

Recurrent networks- RNN, LSTM, GRU
Language modeling
Sequence-to-sequence
Image captioning

Attention Multimodal attention
Self-Attention
Transformers

Object detection Transfer learning
Object detection task
R-CNN detector
Non-Max Suppression (NMS)
Mean Average Precision (mAP)
Single-stage vs two-stage detectors
YOLO
Region Proposal Networks (RPN), Anchor Boxes
Two-Stage Detectors: Fast R-CNN, Faster R-CNN
Feature Pyramid Networks

LAB - Object detection

Object segmentation - Single-Stage Detectors: RetinaNet, FCOS
Semantic segmentation
Instance segmentation
Keypoint estimation

LAB - Deep Learning application to segmentation

Generative Models
Supervised vs Unsupervised learning
Discriminative vs Generative models
Autoregressive models
Variational Autoencoders

Motion estimation, Optical flow

Diffusion models

3D Vision - 3D shape representations
Depth estimation
3D shape prediction
Voxels, Pointclouds, SDFs, Meshes
Implicit functions, NeRF

Videos
Video classification
Early / Late fusion
3D CNNs
Two-stream networks
Transformer-based models

Reinforcement learning

 

There is no requirement to buy a book. The goal of the course is to be self contained, but sections from the following textbooks will be suggested for more formalization and information.

The primary course text will be Rick Szeliski’s draft Computer Vision: Algorithms and Applications 2nd Edition 2022; we will use an online copy (fill the form) at this link

We will be using Piazza for all course notes, homework and final project. 

A copy and link will be provided in website.  

A textbook for Deep Learning with Pytorch script can be accessed at this link

Deep Learning, MIT Press book, Ian Goodfellow and Yoshua Bengio and Aaron Courville

 

 

 

Semestre
Secondo Semestre (dal 04/03/2024 al 14/06/2024)

Tipo esame
Obbligatorio - Affine/Integrativa

Valutazione
Orale - Voto Finale

Orario dell'insegnamento
https://easyroom.unisalento.it/Orario

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