Slides - Computer Graphics and Multimedia

EWA Filtering
minification
magnification
anisotropic
minification-magnification
reconstruction filter
⊗
low-pass filter
=
1.5
1
0.5
–1.5 –1 –0.5 0 0.5 1 1.5
–0.5
–1
–1.5
1.5
1
0.5
–1.5 –1 –0.5 0 0.5 1 1.5
–0.5
–1
–1.5
6
4
2
–6 –4 –2 0 2 4 6
–2
–4
–6
6
4
2
–6 –4 –2 0 2 4 6
–2
–4
–6
2
1
–2 –1 0 1 2
–1
–2
2
1
–2 –1 0 1 2
–1
–2
resampling filter
1.5
1
0.5
–1.5 –1 –0.5 0 0.5 1 1.5
–0.5
–1
–1.5
6
4
2
–6 –4 –2 0 2 4 6
–2
–4
–6
2
1
–2 –1 0 1 2
–1
–2
Computer Graphics Group
Mario Botsch