Modelling colour visibility and appearance for HDR

Modelling colour visibility and appearance for HDR

Betws-y-Coed, Wales, 5.-6.2.2015.

Participants: Rafal Mantiuk (Computer Science, Bangor), Peter Vangorp (Computer Science, Bangor), Marc Edwards (Computer Science, Bangor), Rebecca Sharman (Psychology, Lincoln), Sophie Wuerger (Psychology, Liverpool), Maria Vanrell (Computer Science, Barcelona), Jasna Martinovic (Psychology, Aberdeen); 3 postdocs, 4 PIs

We held a grant writing workshop to discuss a joint EPSRC grant application for a project that would capitalise on our common research interests in luminance-colour interactions across different spatial scales. At the workshop, we first briefly presented our own backgrounds, focusing on aspects relevant for a potential joint project on colour-luminance interactions and their computer vision applications. We identified high dynamic range (HDR) displays as the most promising application, as HDR is currently at the forefront of display innovation. We then discussed previous work in the area, to enable us to focus on novel approaches to the long standing problem of modelling colour visibility, as well as to the relatively more recent issue of modelling colour appearance. Towards the end of the workshop, we designed several sub-projects, and made plans on how to execute the joint writing of the proposal.

Our project will aim to construct a two-stage model of performance and appearance for spatio-chromatic information across the luminance range in order to provide visual metrics for assessing visibility as well as other perceived image attributes (lightness, sharpness, colourfulness and depthness) in HDR displays. With the ability to display a large range of light intensities, HDR displays improve the quality of image reproduction and bring it closer to our everyday viewing experience. Computer vision models for HDR have already been built on the basis of data on visual system performance (e.g., luminance-based HDR-VDP2 by Mantiuk et al., 2011, SIGGRAPH), whilst recent research has begun to test (Radonjic et al., 2011, Current Biology) and model (Kim, Weyrich, Kautz, 2009, ACM Transactions on Graphics) appearance under HDR conditions. As a part of HDR display development, our project will establish a model of colour discriminability and colour appearance under HDR viewing conditions in order to enable effective display of colour images and videos on such devices.

Actions:
– Bi-weekly minuted hourly meetings on skype for task allocation, coordination of resource sharing and project management (starting from 24.2.)
– Sharing of resources via a joint dropbox folder
– Initial work packages to be completed by April, subsequent work packages to be completed by May
– Proposal to be completed and submitted by September 2015 at the latest, preferably earlier.

 

Dr Jasna Martinovic (Psychology, Aberdeen)