Results
Notes
- All the experiments were performed in a 1.3Ghz Pentium M machine [equiv 2Ghz P4], 768MB RAM, ATI Radeon9200.
- In general, the multi-res algorithm produced better results than the single-res for the same neighborhood size. This is because the part of the neighborhood on the lower-level image captures information about all the area surrounding the pixel (unlike the causal neighborhoods of the single-res algorithm). For example, compare the multi-res and single-res results for the first sample texture below with neighborhood of size 4.
- The multi-res algorithm was in general slower, due to the need to synthesize all the pyramid levels for the output image.
- The quilting algorithm produced the best and fastest results (blocks that didn't fit at the right or bottom were not quilted, which show up as black borders on the result images below).
- All algorithms did ok on textures structured the same throughout, such as the first "diagonal lines" texture below.
- Textures that resemble "general images" (where random blocks from the texture are not similar) can't be synthesized well by any of the algorithms (see the second sample texture below).
- The first few rows and columns of images generated by the Wei-Levoy algorithms are noisy, due to having neighborhoods with random noise pixels when they were synthesized.
- The quilting algorithm performs somewhat better with larger sized blocks. See the third sample texture below, where quilting is done with blocks of size 10 and size 20.
- Performance of all the algorithms is somewhat limited by the slow GetPixel/SetPixel operations of the .NET Bitmap class
Experiment results
Input |
Output |
Algorithm |
Neighb./Block size |
Duration |
30x23 |
50x50 |
Single |
4 |
12 sec |
|
50x50
|
Single |
7 |
20 sec |
|
50x50
|
Single |
20 |
50 sec |
|
50x50 |
Multi |
4 |
74 sec |
|
50x50
|
Multi |
7 |
106 sec |
|
50x50
|
Quilt |
10 |
less than 1 sec |
|
100x100
|
Single |
4 |
52 sec |
|
100x100
|
Single |
7 |
85 sec |
|
100x100 |
Single |
20 |
203 sec |
|
100x100
|
Multi |
4 |
302 sec |
|
100x100
|
Quilt |
10 |
1 sec |
50x50
|
50x50
|
Single |
4 |
47 sec |
|
50x50
|
Single |
7 |
84 sec |
|
50x50
|
Quilt |
10 |
less than 1 sec |
|
50x50
|
Quilt |
20 |
less than 1 sec |
|
100x100
|
Quilt |
10 |
1 sec |
|
100x100
|
Quilt |
20 |
less than 1 sec |
50x50
|
50x50 |
Single |
4 |
47 sec |
|
50x50 |
Single |
7 |
85 sec |
|
50x50 |
Multi |
4 |
306 sec |
|
50x50 |
Quilt |
10 |
less than 1 sec |
|
50x50 |
Quilt |
20 |
less than 1 sec |
|
100x100 |
Quilt |
10 |
1 sec |
|
100x100 |
Quilt |
20 |
less than 1 sec |