John Keyser - Academia.edu (original) (raw)
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Papers by John Keyser
Computer Graphics Forum, 2008
We present a new method for rapidly computing shadows from semi-transparent objects like hair. Ou... more We present a new method for rapidly computing shadows from semi-transparent objects like hair. Our deep opacity maps method extends the concept of opacity shadow maps by using a depth map to obtain a per pixel distribution of opacity layers. This approach eliminates the layering artifacts of opacity shadow maps and requires far fewer layers to achieve high quality shadow computation. Furthermore, it is faster than the density clustering technique, and produces less noise with comparable shadow quality. We provide qualitative comparisons to these previous methods and give performance results. Our algorithm is easy to implement, faster, and more memory efficient, enabling us to generate high quality hair shadows in real-time using graphics hardware on a standard PC.
ACM Transactions on Graphics, 2007
ACM Reference Format Yuksel, C., House, D., Keyser, J. 2007. Wave Particles. ACM Trans. Graph. 26... more ACM Reference Format Yuksel, C., House, D., Keyser, J. 2007. Wave Particles. ACM Trans. Graph. 26, 3, Article 99 (July 2007), 8 pages. DOI = 10.1145/1239451.1239550 http://doi.acm .org/10.1145/1239451.1239550. Copyright Notice Permission to make digital or hard ...
ACM Transactions on Graphics, 2008
Computer Graphics Forum, 2008
We present a new method for rapidly computing shadows from semi-transparent objects like hair. Ou... more We present a new method for rapidly computing shadows from semi-transparent objects like hair. Our deep opacity maps method extends the concept of opacity shadow maps by using a depth map to obtain a per pixel distribution of opacity layers. This approach eliminates the layering artifacts of opacity shadow maps and requires far fewer layers to achieve high quality shadow computation. Furthermore, it is faster than the density clustering technique, and produces less noise with comparable shadow quality. We provide qualitative comparisons to these previous methods and give performance results. Our algorithm is easy to implement, faster, and more memory efficient, enabling us to generate high quality hair shadows in real-time using graphics hardware on a standard PC.
ACM Transactions on Graphics, 2007
ACM Reference Format Yuksel, C., House, D., Keyser, J. 2007. Wave Particles. ACM Trans. Graph. 26... more ACM Reference Format Yuksel, C., House, D., Keyser, J. 2007. Wave Particles. ACM Trans. Graph. 26, 3, Article 99 (July 2007), 8 pages. DOI = 10.1145/1239451.1239550 http://doi.acm .org/10.1145/1239451.1239550. Copyright Notice Permission to make digital or hard ...
ACM Transactions on Graphics, 2008