CS231n: Convolutional Neural Networks for Visual Recognition
Stanford - Spring 2021
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This iteration of the class has ended!
Computer Vision has become ubiquitous in our society, with applications in search, image understanding, apps, mapping, medicine, drones, and self-driving cars. Core to many of these applications are visual recognition tasks such as image classification, localization and detection. Recent developments in neural network (aka “deep learning”) approaches have greatly advanced the performance of these state-of-the-art visual recognition systems. This course is a deep dive into the details of deep learning architectures with a focus on learning end-to-end models for these tasks, particularly image classification. During the 10-week course, students will learn to implement and train their own neural networks and gain a detailed understanding of cutting-edge research in computer vision. Additionally, the final assignment will give them the opportunity to train and apply multi-million parameter networks on real-world vision problems of their choice. Through multiple hands-on assignments and the final course project, students will acquire the toolset for setting up deep learning tasks and practical engineering tricks for training and fine-tuning deep neural networks.
Live Remote Lectures: Tuesday/Thursday 1:00-2:20PM Pacific Time. Zoom link is posted on Canvas.
Lecture Videos: Will be posted on Canvas shortly after each lecture. These are unfortunately only accessible to enrolled Stanford students.
Office Hours: We've switched to using Nooks for office hours. You can find a full list of times and locations on the calendar.
Contact: Announcements and all course-related questions will happen on the Piazza forum. For external enquiries, emergencies, or personal matters that you don't wish to put in a private post, you can email us at firstname.lastname@example.org
College Calculus, Linear Algebra (e.g. MATH 19 or 41, MATH 51) You should be comfortable taking derivatives and understanding matrix vector operations and notation.
Basic Probability and Statistics (e.g. CS 109 or other stats course) You should know basics of probabilities, gaussian distributions, mean, standard deviation, etc.
See the Assignment page for details regarding assignments, late days and collaboration policies.
Detailed information regarding the midterm will be made available as an announcement on Piazza in the coming weeks.
Final Project (35%)
See the Project page for more details regarding the final course project.
We appreciate student participation in the class! We'll be awarding up to 3% in extra credit to the top ~20 Piazza contributors.
If you feel you deserved a better grade on an assignment, you may submit a regrade request on Gradescope within 3 days of the grade release. Your request should briefly summarize why you feel the original grade was unfair. Your TA will re-evaluate your assignment as soon as possible, and then issue a decision.
All students have 4 free late days for the quarter.
You may use up to 2 late days per assignment with no penalty.
You may use late days for the assignments, project proposal, and project milestone.
You may not use late days for the final project report.
Once you have exhausted your free late days, we will deduct a late penalty of 25% per additional late day.
For example: you submit A1 one day late, submit A2 three days late, and submit A3 two days late.
You receive no penalty for A1, and exhaust one of your free late days.
For A2 the first two late days exhaust two of your free late days; the third day late incurs a 25% penalty.
For A2 the first late day exhausts your final free late day; the second late day incurs a 25% penalty.
For the project proposal and milestone, we will deduct late days from each group member independently.
If you need an academic accommodation based on a disability, you should initiate the request with the Office of Accessible Education (OAE). The OAE will evaluate the request, recommend accommodations, and prepare a letter for faculty. Students should contact the OAE as soon as possible and at any rate in advance of assignment deadlines, since timely notice is needed to coordinate accommodations. It is the student’s responsibility to reach out to the teaching staff regarding the OAE letter. Please send your letters to email@example.com
Can I take this course on credit/no cred basis?
Yes. Credit will be given to those who would have otherwise earned a C- or above.
Can I audit or sit in?
In general we are very open to auditing if you are a member of the Stanford community (registered student, staff, and/or faculty). Out of courtesy, we would appreciate that you first email us or talk to the instructor after the first class you attend.
Can I work in groups for the Final Project?
Yes, in groups of up to three people.
I have a question about the class. What is the best way to reach the course staff?
Almost all questions should be asked on Piazza. If you have a sensitive issue you can email the instructors directly.
Can I combine the Final Project with another course?
Yes, you may; however before doing so you must receive permission from the instructors of both courses.