CS 7650: Realistic Image Synthesis

Thiago Ize

HW2

True value is:                                         4/3 == 1.33333
unstratified uniform random sampling:                         1.35031
stratified uniform random sampling:                           1.33284
stratified importance sampling with pdf=x^2:                  1.16347
stratified importance sampling with pdf=(PI/2-x)^2:           1.09986
stratified importance sampling with pdf=average of last two:  1.19795