Sampling

Homework 3

Simon Premoze


Introduction

2D Function

  Function:
L(x,y) = (0.5 + 0.5*fade*sin(2.0*Pi*a*exp(5*a)))
where a = x/Nx and fade = (1.0 - y/Ny)^3
Sampling Type 1 sample/pixel 4 samples/pixel 16 samples/pixel 100 samples/pixel 900 samples/pixel

Uniform

Regular

Jitter

Half Jitter

Multi Jitter

N-Rooks

Poisson Disk

Quasi-MC

Adaptive


Note1: Adaptive sampling: average 105 samples / pixel, maximum 205 samples / pixel
Note2: Poisson disk sampling methods with 900 samples per pixels ran for 10 hours before giving up
Note3: All images were renderered with box filter of width 1

Checkerboard

Sampling Type 1 sample/pixel 4 samples/pixel 16 samples/pixel 100 samples/pixel

Regular

Uniform

Jitter

Multi Jitter

Half Jitter

N-Rooks

Adaptive


Note1: Adaptive sampling: average 120 samples / pixel, maximum 235 samples / pixel
Note2: All images were renderered with box filter of width 1

Conclusions


 

Simon Premoze

premoze@cs.utah.edu