Affine Transform Example
x' |
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1 x |
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EE465: Introduction to Digital |
41 |
Image Processing |
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Shear
square |
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parallelogram |
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x' |
1 |
0 x |
dx |
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y' |
s |
1 y |
d y |
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EE465: Introduction to Digital |
42 |
Image Processing |
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Shear Example
x' |
1 |
0 x |
0 |
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.5 |
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EE465: Introduction to Digital |
43 |
Image Processing |
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Projective Transform
B’
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A’ |
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C’
D |
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D’ |
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square |
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quadrilateral |
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x ' |
a1x a2 y a3 |
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a |
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a y 1 |
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7 |
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y' a4 x a5 y a6 a7 x a8 y 1
EE465: Introduction to Digital |
44 |
Image Processing |
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Projective Transform Example
[ 0 0; 1 0; 1 1; 0 1] |
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[-4 2; -8 -3; -3 -5; 6 3] |
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EE465: Introduction to Digital |
45 |
Image Processing |
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Polar Transform
r
x2 y2
tan 1 y x
EE465: Introduction to Digital |
46 |
Image Processing |
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Iris Image Unwrapping
r
EE465: Introduction to Digital |
47 |
Image Processing |
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Use Your Imagination
r -> sqrt(r)
http://astronomy.swin.edu.au/~pbourke/projection/imagewarp/
EE465: Introduction to Digital |
48 |
Image Processing |
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Free Form Deformation
Seung-Yong Lee et al., “Image Metamorphosis Using Snakes and Free-Form Deformations,”SIGGRAPH’1985, Pages 439-448
EE465: Introduction to Digital |
49 |
Image Processing |
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Application into Image Metamorphosis
EE465: Introduction to Digital |
50 |
Image Processing |
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