Computer Vision Student Seminars
The Computer Vision Student Seminars at the University of Maryland College Park are a student-run series of talks given by current graduate students for current graduate students.
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Description
The purpose of these talks is to:
- Encourage interaction between computer vision students;
- Provide an opportunity for computer vision students to be aware of and possibly get involved in the research their peers are conducting;
- Provide an opportunity for computer vision students to receive feedback on their current research;
- Provide speaking opportunities for computer vision students.
The guidelines for the format are:
- An hour-long weekly meeting, consisting of one 20-40 minute talk followed by discussion and food.
- The talks are meant to be casual and discussion is encouraged.
- Topics may include current research, past research, general topic presentations, paper summaries and critiques, or anything else beneficial to the computer vision graduate student community.
Schedule Spring 2013
All talks take place Thursdays at 4:30pm in AVW 3450.
| Date | Speaker | Title |
|---|---|---|
| January 24 | (no meeting) | |
| January 31 | Mohammad Rastegari | Scalable object-class retrieval with approximate and top-k ranking |
| February 7 | ||
| February 14 | Stephen Xi Chen | Piecing Together the Segmentation Jigsaw using Context |
| February 21 | ||
| February 28 | Kota Hara | |
| March 7 | Arijit Biswas | |
| March 14 | ||
| March 21 | (Spring Break, no meeting) | |
| March 28 | (Midterms, no meeting) | |
| April 4 | ||
| April 11 | (ICCV deadline, no meeting) | |
| April 18 | Raviteja Vemulapalli | |
| April 25 | ||
| May 2 | Xavier Gibert Serra |
Talk Abstracts Spring 2013
Scalable object-class retrieval with approximate and top-k ranking
Speaker: Mohammad Rastegari -- Date: January 31, 2013
In this paper we address the problem of object-class retrieval in large image data sets: given a small set of training examples defining a visual category, the objective is to efficiently retrieve images of the same class from a large database. We propose two contrasting retrieval schemes achieving good accuracy and high efficiency. The first exploits sparse classification models expressed as linear combinations of a small number of features. These sparse models can be efficiently evaluated using inverted file indexing. Furthermore, we introduce a novel ranking procedure that provides a significant speedup over inverted file indexing when the goal is restricted to finding the top-k (i.e., the k highest ranked) images in the data set. We contrast these sparse retrieval models with a second scheme based on approximate ranking using vector quantization. Experimental results show that our algorithms for object-class retrieval can search a 10 million database in just a couple of seconds and produce categorization accuracy comparable to the best known class-recognition systems.
Past Semesters
Funded By
- Computer Vision Faculty
- Northrop Grumman
Current Seminar Series Coordinators
Emails are at umiacs.umd.edu.
| Ejaz Ahmed, ejaz@ | (student of Professor Larry Davis) |
| Angjoo Kanazawa, kanazawa@ | (student of Professor David Jacobs) |
| Jie Ni, jni@ | (student of Professor Rama Chellappa) |
| Ching Lik Teo, cteo@ | (student of Professor Yiannis Aloimonos) |
Gone but not forgotten.
| Anne Jorstad | now PostDoc at EPFL |
| Sameh Khamis | off this semester |
| Sima Taheri |