TY - JOUR
T1 - Stair blue noise sampling
AU - Kailkhura, Bhavya
AU - Thiagarajan, Jayaraman J.
AU - Bremer, Peer Timo
AU - Varshney, Pramod Kumar
PY - 2016/11/1
Y1 - 2016/11/1
N2 - A common solution to reducing visible aliasing artifacts in image reconstruction is to employ sampling patterns with a blue noise power spectrum. These sampling patterns can prevent discernible artifacts by replacing them with incoherent noise. Here, we propose a new family of blue noise distributions, Stair blue noise, which is mathematically tractable and enables parameter optimization to obtain the optimal sampling distribution. Furthermore, for a given sample budget, the proposed blue noise distribution achieves a significantly larger alias-free low-frequency region compared to existing approaches, without introducing visible artifacts in the mid-frequencies. We also develop a new sample synthesis algorithm that benefits from the use of an unbiased spatial statistics estimator and efficient optimization strategies.
AB - A common solution to reducing visible aliasing artifacts in image reconstruction is to employ sampling patterns with a blue noise power spectrum. These sampling patterns can prevent discernible artifacts by replacing them with incoherent noise. Here, we propose a new family of blue noise distributions, Stair blue noise, which is mathematically tractable and enables parameter optimization to obtain the optimal sampling distribution. Furthermore, for a given sample budget, the proposed blue noise distribution achieves a significantly larger alias-free low-frequency region compared to existing approaches, without introducing visible artifacts in the mid-frequencies. We also develop a new sample synthesis algorithm that benefits from the use of an unbiased spatial statistics estimator and efficient optimization strategies.
KW - Anti-aliasing
KW - Blue noise
KW - Pair correlation function
KW - Sampling
UR - http://www.scopus.com/inward/record.url?scp=85055791014&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85055791014&partnerID=8YFLogxK
U2 - 10.1145/2980179.2982435
DO - 10.1145/2980179.2982435
M3 - Article
AN - SCOPUS:85055791014
VL - 35
JO - ACM Transactions on Graphics
JF - ACM Transactions on Graphics
SN - 0730-0301
IS - 6
M1 - 248
ER -