lecture04 - CS 551/651: Advanced Computer Graphics...

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David Luebke 1 CS 551/651: Advanced Computer Graphics Accelerating Ray Tracing Continued Antialiasing
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David Luebke 2 Recap: Accelerating Ray Tracing Problem: Lots of pixels = lots of rays Computing shadows generates even more rays Supersampling generates even more rays Solutions: Trace rays more quickly Shoot fewer rays Reorder ray computation
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David Luebke 3 Antialiasing Aliasing: signal processing term with very specific meaning Aliasing: computer graphics term for any unwanted visual artifact Antialiasing: computer graphics term for avoiding unwanted artifacts We’ll tackle these in order
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David Luebke 4 Signal Processing Raster display: regular sampling of a continuous function ( Really? ) Think about sampling a 1-D function:
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David Luebke 5 Signal Processing Sampling a 1-D function:
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David Luebke 6 Signal Processing Sampling a 1-D function:
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David Luebke 7 Signal Processing Sampling a 1-D function: What do you notice?
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David Luebke 8 Signal Processing Sampling a 1-D function: what do you notice?
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lecture04 - CS 551/651: Advanced Computer Graphics...

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