Australian Centre for Visual Technologies Blog


ISMAR Paper Prize
October 21, 2010, 9:40 am
Filed under: publications, research

The paper Real-time Modelling for AR Applications won second prize in the best paper awards at the International Symposium on Mixed and Augmented Reality 2010 in Seoul, Korea.

The paper describes a method for generating 3D models of objects which requires minimal user interaction.  The motivation was the desire to allow users to create special effects to video as it is captures.  The interface is thus suitable for implementation on a video camera or phone.

The video shows the technique being used to copy and paste real objects in live video.  The user can thus indicate the object they are interested in, and then indicate where they’d like it to appear.  The system models the object and renders it where it needs to be, all as the video is being captured.

The slides for the ISMAR talk are available here.



CVPR Best Paper Award
June 17, 2010, 11:13 am
Filed under: news, publications, research

Our paper

Efficient Computation of Robust Low-Rank Matrix Approximations in the Presence of Missing Data using the L1 Norm, Anders Eriksson and Anton van den Hengel, 2010 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR 2010), June 2010, San Francisco, USA, IEEE 2009

won the CVPR’10 best paper award. There were almost 1750 submissions to the conference, of which 78, including ours were given oral presentations.

The paper presents a method for calculating a low rank factorisation of a matrix with missing elements on the basis of the L1 norm. Our approach is a generalisation of the Wiberg algorithm for achieving the same result using the L2 norm, which has recently been shown to be highly effective. A key step in the generalisation to the L1 case is to calculate the derivative of the solution to a linear programming problem, which allows the Jacobian of the over-arching minimisation problem to be calculated directly. Results for the new method show a significant performance advantage over competing approaches.

The pdf is available here.

The bibtex is

@inproceedings{Eriksson_CVPR10_Robust,
author = “Anders Eriksson and Anton van den Hengel”,
title = “Efficient Computation of Robust Low-Rank Matrix Approximations in the Presence of Missing Data using the L1 Norm”,
booktitle = “The Twenty-Third IEEE Conference on Computer Vision and Pattern Recognition (CVPR’10)”,
year = “2010”,
month = “June”,
address = “San Francisco, CA”,
}



Three ACVT papers at CVPR’10
June 17, 2010, 11:12 am
Filed under: news, publications, research

The ACVT had 3 papers accepted to CVPR this year.

They are



Two ACVT papers accepted to ECCV
June 17, 2010, 11:07 am
Filed under: news, publications, research

Tat-Jun Chin and Jin Yu had their papers accepted to ECCV 2010.

Details and pdfs soon.



Factorisation at CVPR
June 7, 2010, 5:50 pm
Filed under: news, publications, research

Our paper Efficient Computation of Robust Low-Rank Matrix Approximations in the Presence of Missing Data using the L1 Norm was accepted to CVPR’10 as an oral presentation.  The paper presents a method for calculating a low rank factorisation of a matrix with missing elements on the basis of the L1 norm. Our approach is a generalisation of the Wiberg algorithm for achieving the same result using the L2 norm, which has recently been shown to be highly effective. A key step in the generalisation to the L1 case is to calculate the derivative of the solution to a linear programming problem, which allows the Jacobian of the over-arching minimisation problem to be calculated directly. Results for the new method show a significant performance advantage over competing approaches.

The pdf is available here.



ACVT at WACV 2009
February 3, 2010, 6:25 am
Filed under: publications

Following DICTA, Rhys Hill attended WACV 2009 in Snowbird, Utah, presenting ‘Automatic Camera Placement for Large Scale Surveillance Networks’ by Anton van den Hengel, Rhys Hill, Ben Ward, Alex Cichowski, Henry Detmold, Chris Madden, Anthony Dick and John Bastian



ACVT at DICTA 2009
February 3, 2010, 6:19 am
Filed under: publications

ACVT members Rhys Hill and Wojciech Chojnacki recently attended DICTA 2009 in Melbourne, presenting the papers:

‘Measuring Latency for Video Surveillance Systems’ by Rhys, Christopher Madden, Anton van den Hengel, Henry Detmold, and Anthony Dick

and

‘Multi-projective Parameter Estimation for Sets of Homogeneous Matrices’ by Wojciech, Rhys, Anton van den Hengel, and Michael J. Brooks