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A Stained Glass Image Filter

A Stained Glass Image Filter . David Mould University of Saskatchewan. Stained Glass Filter. Goal: transform any image into stained-glass image. ?. “Cartoon” – planned tile layout Leading emphasizes image edges Tiles have simple shapes Few colors used. Stained Glass. Voronoi regions.

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A Stained Glass Image Filter

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  1. A Stained Glass Image Filter David Mould University of Saskatchewan

  2. Stained Glass Filter • Goal: transform any image into stained-glass image ?

  3. “Cartoon” – planned tile layout Leading emphasizes image edges Tiles have simple shapes Few colors used Stained Glass

  4. Voronoi regions • Mosaics; Photoshop filter

  5. Stained Glass Tiles • Tile boundaries match image edges • No large tiles • No small tiles • No “weird” tiles

  6. Stained Glass Tiles (2) • Tiles should be “approximately convex” – no bottlenecks • No “island” tiles

  7. Segmentation

  8. Morphological Operators • Erosion • Dilation

  9. Region Smoothing

  10. Region Smoothing

  11. Tile Repair • Bottlenecks detected by progressive erosion. • Disconnected components are relabeled and simultaneously dilated into the parent region. • Similar approach used to subdivide big tiles.

  12. Completed Cartoon

  13. Completed Cartoon Large regions split Bottlenecks split

  14. Backgrounds

  15. Backgrounds

  16. Choosing Colors • Medieval palette highly restricted • Want colors near the image colors, but – • bright • high contrast • from limited palette

  17. Heraldic Tinctures • Medieval colorset • Corresponds closely to colors available in glass • Designed to be vivid and high-contrast

  18. Heraldic Tinctures

  19. Stained Glass Filter • Segmentation • Region smoothing • Removal of small tiles • Subdivision of strange-shaped tiles • Subdivision of large tiles • Tile coloring • Rendering

  20. Color Selection • Choose heraldic color nearest the original color • Map sable to off-white (clear glass)

  21. Rendered Images

  22. Future Work • painting glass • glass defects – scarring, chipping – as additional channel to match initial image • later technology: flashing, etching

  23. Questions?

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