Graphics Reference
In-Depth Information
3000
2500
Texture
Texture unrolled
Shared
Shared unrolled
FFT
2000
1500
1000
500
0
0
1000
2000
3000
4000
Image Size
900
800
700
600
500
400
Texture
300
Texture unrolled
200
Shared
Shared unrolled
FFT
100
0
0
1000
2000
3000
4000
Image Size
Figure 5.7.
Performance, measured in megapixels per second, for the different imple-
mentations of 2D filtering and image sizes ranging from 128
×
128 to 4096
×
4096. Note
the performance spikes for the FFT-based filtering for image sizes that are a power of 2.
The results for a 9
×
9 filter are shown in the upper plot and the results for a 17
×
17
filter in the lower plot.
