1. Bilateral Filter Wojciech Korycki wojciech.korycki@gmail.com 23.06.2010 Wrocław Implementations compare

2. Bilateral Filter- introduction Bilateral filtering will preserve edges but… To high parameters, that is R = MAX, might change bilateral filter to normal Gaussian filter. (MAX- usually 255 or 1)

3. Bilateral Filter- implementations Application implemetations Bilateral Filter Normal Bilateral Filter CPU CPU (indexing) Fast approximation CUDA Cross Bilateral Filter CPU CPU (indexing) Fast approximation CUDA

4. Bilateral Filter- testing Test images

5. Bilateral Filter- testing Processing time tabble for 8-bit gray scale image Image Lena.bmp (512x512, 8-bit Gray Scale) Bilateral Filter Processing type Parameters SR SR S R 3107 11 10 t [s] CPU2,0236,82114,394 CPU (indexing)0,6941,1822,091 Fast Approximation0,1410,1370,201 CUDA0,0190,0510,108

6. Bilateral Filter- testing Processing time diagram for 8-bit gray scale image

7. Bilateral Filter- testing Visual results

8. Bilateral Filter- testing Processing time tabble for 24-bit RGB image image Iwonka.bmp (24-bit RGB) Bilateral Filter Processing type Parameters SR SR S R 3107 11 10 t [s] CPU2,3568,1217,728 CPU (indexing)0,9752,0854,11 Fast Approximation0,5380,3390,444 CUDA0,0260,080,174

9. Bilateral Filter- testing Processing time diagram for 24-bit RGB image

10. Bilateral Filter- testing Visual results

11. Bilateral Filter- testing Processing result

12. Bilateral Filter- summary General profit in CUDA processing (time in [s])

13. Bilateral Filter- addons Result of Cross Bilateral Filter processing + =

14. Bilateral Filter- addons Iterations= 10 iterations= 20

15. Bilateral Filter- side effects Fog effect

16. Bilateral Filter- side effects Edges blur