Congratulations to Gary Tam and co-authors for their Best Paper Award at VAST 2016: An Analysis of Machine- and Human-Analytics in Classification, Gary K. L. Tam, Vivek Kothari, Min Chen, http://dx.doi.org/10.1109/TVCG.2016.2598829.
In this work, we present a study that traces the technical and cognitive processes in two visual analytics applications to a common theoretic model of soft knowledge that may be added into a visual analytics process for constructing a decision-tree model. Both case studies involved the development of classification models based on the “bag of features” approach. Both compared a visual analytics approach using parallel coordinates with a machine-learning approach using information theory. Both found that the visual analytics approach had some advantages over the machine learning approach, especially when sparse datasets were used as the ground truth. We examine various possible factors that may have contributed to such advantages, and collect empirical evidence for supporting the observation and reasoning of these factors. We propose an information-theoretic model as a common theoretic basis to explain the phenomena exhibited in these two case studies. Together we provide interconnected empirical and theoretical evidence to support the usefulness of visual analytics.
We were pleased to have Natalia and Gennady Andrienko to visit us for our Research Away Day 23/2/2016. Click for the schedule for the full day.
This project will apply advanced visualization and analysis research to the massive quantities of data produced by water internet connected sensors. Managing precious water reserves is a key challenge facing the world. The company we will work with is a world leading developer of sensors for the water industry producing products that measure water flow, pinpoint leaks, monitor flood risk from rivers, etc. All of these devices are connected to the internet allowing real-time monitoring of the environment and water distribution to a customer level. They are currently in a major infrastructure project to install leak, pressure and flow sensors throughout water distribution network.
Application deadline: Friday 25th November 2015. Start date: January 1st 2016. Further details and application.
Computer Science at Swansea has funding for 5 research posts. Get in touch with me if you would like to work in the area of Visual Computing. The deadline for application is likely to be December 4th 2015, and interested people should contact me well before that date since we need to write a competitive case. The criteria for selection are:
- Achieved PhD before March 2013.
- Outside UK, or not been resident in the UK for more than 12 months in last three years.
Congratulations to Jonathan Jones who successfully defended his PhD today. His thesis is entitled 2D and 3D Segmentation of Medical Images.
The external examiner was Carlos Reyes (City University), internal Chefeng Li and Ben Mora chaired the viva.
Rectangle packing algorithm for tree and graph visualization
Robert Recorde, Monday July 27th at 3pm
Abstract This talk introduces the speaker’s techniques on space-filling tree and network visualization. The former part of the talk introduces a tree visualization technique which represents hierarchy of the tree structure as nested rectangular regions. The latter part of the talk introduces a network visualization technique which clusters nodes according to their categories and connectivity, and then displays the clusters as rectangular regions. Both techniques are based on a rectangle packing algorithm which efficiently places the rectangular regions onto a display space. This talk also introduces several applications of the tree and network visualization techniques.
Biography Professor Takayuki Itoh is a full professor of the department of information sciences in Ochanomizu University, Japan since 2011. His research interest includes visualization, computer graphics, and multimedia. He is a vice director of the society for art and science in Japan, and a track chair of ACM Symposium on Applied Computing, Multimedia and Visualization track.
Takayuki Itoh has received his B.S., M.S., and Ph.D. degrees from Waseda University in 1990, 1992, and 1997, respectively. He has been a researcher at Tokyo Research Laboratory of IBM Japan during 1992 to 2005. He was also a visiting researcher at Carnegie Mellon University in 2000, and Kyoto University during 2003 to 2005. He has been an associate professor in Ochanomizu University since 2005, and a full professor since 2011.
Today, Andy Ryan passed his PhD viva on Volume and Image Reconstruction: Variations and Acceleration of Expectation Maximization and Filtered Back Projection. Ben Mora was the supervisor, Mark Jones the internal examiner and Charalampos Tsoumpos the external examiner. Congratulations Andy!
BMVA Computer Vision Summer School 2014 was successfully hosted at Swansea from 30 June to 4 July 2014. A total of 67 delegates from 14 different countries ( 21 from outside UK) were attending the 19th edition of this summer school. 17 speakers from both academia and industry delivered 19 lectures and 2 lab sessions.
Click here to visit the summer school website.
Tim Weyrich talk at RIVIC graduate school 2014, Swansea
The fifth annual RIVIC Graduate School was held 16th-17th June 2014 in Swansea, setting a new record of 37 talks by students and researchers, with 3 keynote talks from Majid Mirmehdi (Bristol), Tim Weyrich (UCL) and Kurt Debattista (Warwick). The event was arranged over two days in sunny Swansea with a wide range of talks in the topics of Vision, Graphics and Visualisation (Visual Computing). Our conference dinner was held in the Grape and Olive, the 27th floor of the Meridian tower offering superb views over Swansea bay, the city and local countryside.
The RIVIC Graduate School is an excellent opportunity for researchers across the RIVIC sites (Swansea, Aberystwyth, Bangor and Cardiff) to meet up, discuss research projects, seek ideas and solutions, collaborate and generally see the active and varied Visual Computing research ongoing across Wales. We also have keynote talks from excellent researchers, including this year from Majid Mirmehdi (Bristol), Tim Weyrich (UCL) and Kurt Debattista (Warwick).
Majid Mirmehdi (Bristol) spoke about the SPHERE project. In particular he gave a case study of using low cost consumer devices such as Kinect to measure progression of rehabilitation. The ultimate aim is to instrument houses with several sensors and video systems to monitor the health of occupants. He also gave some real-time automotive applications such as road sign detection and in car human/car interaction detection.
Tim Weyrich’s (UCL) talk “Bespoke Computer Graphics Systems for Cultural Heritage Applications” demonstrated how off-the-shelf devices can be re-engineered and integrated with novel software and algorithms to provide robust solutions to real-world heritage problems such as matching up smashed mosaic tiles to aid reconstruction and restoration work.
Kurt Debattista’s (Warwick) talk “High-Fidelity Graphics” covered the past, current and future challenges for high quality global illumination rendering in terms of usability, computational load and adoption. Kurt contextualised his work with industrial experience in application areas of car model rendering (with Land Rover) and architectural applications (with Arup).