Thomas S Methven

PhD, MEng (with Distinction), BSc

Texture Lab,
School of Mathematical and Computer Science,
Heriot-Watt University, Edinburgh, EH14 4AS
t dot methven at hw dot ac dot uk
+44 (0)131 451 4166

Conferences and Publications

Research Interests

Well Sorted

In his famous novel, Animal Farm, Orwell coined the phrase ‘All animals are equal, but some animals are more equal than others’. This satirical observation aptly describes the most common problem which emerges in the group dynamics present in academic community and funding meetings.

To help address this problem, I am currently working to develop Well Sorted, a democratic, online card sorting tool designed to allow meeting participants to remotely collaborate before attending a group meeting. This is being designed to avoid the Animal Farm problem which leads many attendees to become disengaged during meetings.

Well Sorted allows you to create studies, manage participants, and view results all in your web browser, making it easy to run a card sorting study. Additionally, it supports every stage of the meeting process by allowing participants to submit items into the study through a custom web form, providing an integrated Adobe Flash sorting interface for participants to use, and automatically creating grouping visualisations to explore the results.

Binocular Vision and Gloss

The focus of my PhD research wason binocular perception of gloss with rough surfaces. I worked on created realistic, accurately lit, binocular image pairs which will allow me to examine the interplay of Lambertian reflectance and specular highlights on surface shape, depth and realism perception.

Lambertian and Specular Highlights Image

An example of a surface’s Lambertian shading and specular highlights

For example, the image below is a correct stereo pair (i.e. all the disparity information is correct):

Correct Stereo Pair

Correct Stereo Pair (Suitable for cross-eyed fusion, Click for full-size)

The image below, however, is incorrect. While the gloss has correct disparity, the surfaces itself appears flat:

Incorrect Stereo Pair

Incorrect Stereo Pair (Suitable for cross-eyed fusion, Click for full-size)

Wiimote Tracking

Before joining the Texture Lab, I completed an award-winning MEng Project using the Wiimote to track a user’s fingers.

Finger Tracking Diagram

How Finger-Tracking Works

This project involved created several different prototype applications and testing them with school children to see whether finger tracking might be a popular new input method. During this project, two new programs were created, one which allowed for users to finger paint on the screen and the other which allowed them to play a virtual piano (as well as a couple of piano-based games). The piano application was developed further and proved very popular when tested again, especially when used in pairs.

From this, I gained a in-depth knowledge of how the Wiimote worked and possibly avenues of future work.

Surface/Fabric Properties

In association with my colleague, Pawel Orzechowski and the EPSRC funded Digital Sensoria project, I helped create and compile a taxonomy of descriptive words for fabrics which was drawn from non-experts. Participants performed a free grouping experiment with 78 fabric words to create a taxonomy we could use to test property transmission. 11 groups were found by ‘cutting’ the dendrogram created from the similarity results. In addition, participants identified which word from each group best represented that group.

Results from these experiments are shown below.

Word Sorting Dendrogram

Word Sorting Dendrogram (Click for full-size)

Word Sorting Cloud

Word Sorting Cloud (Click for full-size)

Reaction-Diffusion Patterns

To investigate the possibility of using Reaction-Diffusion Patterns as a way of generating naturalistic surfaces for my research, I created a simple application which would allow me to create them. This application lets users watch as the patterns grow and alter the input values, as well as providing a couple of interesting pre-set values.

Reaction Diffusion Standalone Toolbox

Reaction Diffusion Standalone Toolbox Example

Extras

3D version of a word cloud where the height value is calculated by the luminance per pixel. Interactive version via shoogleit.com: 3D Word Cloud

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