Research Output

Pixel history linear models for real-time temporal filtering.

  We propose a new real-time temporal filtering and antialiasing (AA) method for rasterization graphics pipelines. Our method
is based on Pixel History Linear Models (PHLM), a new concept for modeling the history of pixel shading values over time
using linear models. Based on PHLM, our method can predict per-pixel variations of the shading function between consecutive
frames. This combines temporal reprojection with per-pixel shading predictions in order to provide temporally coherent shading,
even in the presence of very noisy input images. Our method can address both spatial and temporal aliasing problems under
a unique filtering framework that minimizes filtering error through a recursive least squares algorithm. We demonstrate our
method working with a commercial deferred shading engine for rasterization and with our own OpenGL deferred shading
renderer.We have implemented our method in GPU and it has shown significant reduction of temporal flicker in very challenging
scenarios including foliage rendering, complex non-linear camera motions, dynamic lighting, reflections, shadows and fine
geometric details. Our approach, based on PHLM, avoids the creation of visible ghosting artifacts and it reduces the filtering
overblur characteristic of temporal deflickering methods. At the same time, the results are comparable to state-of-the-art realtime
filters in terms of temporal coherence.

  • Type:

    Article

  • Date:

    27 October 2016

  • Publication Status:

    Published

  • Publisher

    Wiley-Blackwell

  • DOI:

    10.1111/cgf.13033

  • ISSN:

    0167-7055

  • Library of Congress:

    QA75 Electronic computers. Computer science

  • Dewey Decimal Classification:

    006.6 Computer graphics

  • Funders:

    Innovate UK

Citation

Iglesias-Guitian, J. A., Moon, B., Koniaris, C., Smolikowski, E., & Mitchell, K. (2016). Pixel history linear models for real-time temporal filtering. Computer Graphics Forum, 35(7), (363-372). ISSN 0167-7055

Authors

Keywords

Computer Networks, Communications,

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