This talk addresses the problem of representing captured images in the continuous mathematical space more usually associated with certain forms of drawn ('vector') images. Such an image is resolution-independent so it can be used as a master for varying resolution-specific formats. The main features of a vectorizing codec for photographic images, whose significance is that drawing programs can access images and image components as first-class vector objects, will be described. The talks focuses on the problem of rendering from the isochromic contour form of a vectorised image and demonstrates a new fill algorithm which could also be used in drawing generally. Finally image warping is shown to be both simplified and enhanced in the vector form and real histogram equalisation with genuinely rectangular histograms demonstrated.
Slides:
There is no downloadable version of the slides for this talk available at this time.
About the speaker:
Professor Philip Willis's research interests are within colour raster graphics, computer games, virtual reality and animation and film technologies. He has an underlying interest in picture and object representations, especially the balance between discrete and continuous representations.
He is Professor of Computing, Head of the Department of Computer Science, Director of the Centre for Digital Entertainment and founded the Media Technology Research Centre at the University of Bath. Externally he is a Fellow and past Chair of the Eurographics Association and became the first Eurographics- ACM SIGGRAPH joint member. He was a founding member of UKCRC, the UK Computing Research Committee.
He was Head of the Computing Group from 1986 to 1992. He was Head of the Department of Mathematical Sciences (Applied Mathematics, Computing, Statistics and Pure Mathematics), then the largest Department of the University, from 1997-2000. During this time the Department headed the Times League table and achieved the Teaching Quality Assessment maximum 24 point scores in Mathematics, one of only two in the country. He also initiated the process to form the new Department of Computer Science, which became a reality in 2001. He now heads that Department, which is in the UK top 3 for research outputs.
He holds BSc and DPhil degrees from the University of Sussex, which he still visits frequently, and an MSc degree from the University of Essex.
Contact information:
Professor P J Willis
Department of Computer Science
University of Bath
Bath BA2 7A, United Kingdom
+44 (0)1225 386 964 (direct)
p.j.willis@bath.ac.uk