CS7650 : Realistic Image Synthesis
Homework # 1 Monte Carlo Sum
|
Unstratified random sampling |
10.457 |
|
Stratified random sampling |
0.26416 |
|
Unstratified importance sampling |
1.7231 |
|
Stratified importance sampling |
1.6449 |
|
Exact sum |
1.6448 |
Homework # 2 Monte Carlo Integration
|
Unstratified random sampling |
1.3503054 |
|
Stratified random sampling |
1.3328363 |
|
Stratified importance sampling with PDF proportional to x^2 |
1.1634665 |
|
Stratified importance sampling with PDF proportional to (PI/2-x)^2 |
1.0998637 |
|
Stratified importance sampling with PDF proportional to 0.5*x^2+ 0.5*(PI/2-x)^2 |
1.1979541 |
|
Exact value |
1.3333333 |
Homework # 3 Macbeth Color Checker
|
(Row,Column) |
x |
y |
| 1,1 | 0.427205 | 0.360991 |
| 1,2 | 0.401716 | 0.354877 |
| 1,3 | 0.274204 | 0.280373 |
| 1,4 | 0.274204 | 0.440283 |
| 1,5 | 0.288462 | 0.262665 |
| 1,6 | 0.283362 | 0.366676 |
| 2,1 | 0.523959 | 0.390749 |
| 2,2 | 0.22618 | 0.201618 |
| 2,3 | 0.476641 | 0.313956 |
| 2,4 | 0.302444 | 0.214837 |
| 2,5 | 0.404866 | 0.486683 |
| 2,6 | 0.501126 | 0.425645 |
| 3,1 | 0.201939 | 0.156277 |
| 3,2 | 0.324312 | 0.488585 |
| 3,3 | 0.317657 | 0.317657 |
| 3,4 | 0.465521 | 0.465521 |
| 3,5 | 0.248116 | 0.248116 |
| 3,6 | 0.208378 | 0.286982 |
| 4,1 | 0.3334 | 0.335491 |
| 4,2 | 0.332587 | 0.333095 |
| 4,3 | 0.333329 | 0.333096 |
| 4,4 | 0.33322 | 0.334311 |
| 4,5 | 0.334311 | 0.332412 |
| 4,6 | 0.334908 | 0.330628 |
Homework # 4 Macbeth color checker image (samples per pixel 1000)


Homework # 6 BRDF Model
Samples per pixel
: 5000
Resolution : 256 X 256
Gamma Correction : 2.2

Ward BRDF model:
Ward BRDF model:
ALPHA_U
= 0.1, ALPHA_V = 1.0
Top
Left : ALPHA_U =0.5 , ALPHA_V = 5.0
Top Right : ALPHA_U
= 0.5 , ALPHA_V =1.0
Bottom left : ALPHA_U
= 0.1, ALPHA_V =5.0
Bottom Right : ALPHA_U
= 0.1, ALPHA_V =1.0
Homework # 7 Mixture Density
Samples per pixel : 1000
Resolution : 256 X 256
Gamma Correction : 2.2

Only Uniform sampling Only BRDF sampling Only Light sampling

All samplings weighted by 1/3 each
Homework # 8 Uniform
Scattering & absorption
Samples per pixel : 3000
Resolution : 256 X 256
Gamma Correction : 2.2
Sigma_s = 0.001, Sigma_a =
0.000001
Sigma_s
= 0.005, Sigma_a = 0.0
For Sphere, sigma_s = 0.0,
sigma_a = 0.01
Homework # 9 Rayleigh
Scattering
Samples per pixel : 3000
Resolution : 256 X 256
Gamma Correction : 2.2

Entire room is filled with
Rayleigh
Entire room is filled with Rayleigh
Scattering material, so Sigma_s
for
Scattering material, with light source
red comes out to be far less
than
on the back wall, so Sigma_s for red
Sigma_s for
blue.
is enough for rays from the back wall
to reach the camera
while blue rays
get scattered on the way.
Homework # 10 Subsurface
Scattering
Samples per pixel : 5000
Resolution : 256 X 256
Gamma Correction : 2.2
Homework # 11 Dielectrics
Samples per pixel : 5000
Resolution : 256 X 256
Gamma Correction : 2.2

Top
Left : eta = 0.0
Top Right :
eta = 2.0
Bottom left :
eta = 0.5
Bottom Right :
eta = 1.5
Homework # 11 Final Image
Gamma Correction : 2.2
