NEDI Step 1: Interpolate
diagonal pixels*
1 |
4 |
0
1
4
0
2
2
3
3
Implementation:
-Formulate LS estimation problem with pixels at low resolution and solve {a1,a2,a3,a4}
-Use {a1,a2,a3,a4} to
interpolate the pixel
0 at the high resolution
Please refer to sri1.m in interp.zip
EE565 Advanced Image Proce |
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ssing Copyright Xin Li 2008 |
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NEDI Step 2: Interpolate the |
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Other Half* |
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1 |
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Implementation: |
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-Formulate LS estimation |
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problem with pixels at |
2 |
0 |
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4 |
low resolution and solve |
1 |
{a1,a2,a3,a4} |
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2 |
0 |
4 |
-Use {a1,a2,a3,a4} to |
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interpolate the pixel |
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3 |
3 |
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0 at the high resolution |
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Please refer to sri2.m in interp.zip
EE565 Advanced Image Proce |
22 |
ssing Copyright Xin Li 2008 |
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Geometric Duality
Step-I |
Step-I after rotation |
Step-II |
of 45-degree |
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EE465: Introduction to Digital |
23 |
Image Processing |
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Image Interpolation
• Introduction
• Interpolation Techniques
– 1D zero-order, first-order, third-order
– 2D zero-order, first-order, third-order
– Directional interpolation*
• Interpolation Applications
– Digital zooming (resolution enhancement) |
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– Image inpainting (error concealment) |
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– Geometric transformations (where your |
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imagination can fly) |
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EE465: Introduction to Digital |
24 |
Image Processing |
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Pixel Replication
low-resolution image (100×100)
high-resolution image (400×400)
EE465: Introduction to Digital |
25 |
Image Processing |
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Bilinear Interpolation
low-resolution image (100×100)
high-resolution image (400×400)
EE465: Introduction to Digital |
26 |
Image Processing |
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Bicubic Interpolation
low-resolution image (100×100)
high-resolution image (400×400)
EE465: Introduction to Digital |
27 |
Image Processing |
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Edge-Directed Interpolation
(Li&Orchard’2000)
low-resolution image (100×100)
high-resolution
image (400×400)
EE465: Introduction to Digital 28 Image Processing
Image Demosaicing
(Color-Filter-Array Interpolation)
Bayer Pattern
EE465: Introduction to Digital |
29 |
Image Processing |
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Image Example
Ad-hoc CFA Interpolation |
Advanced CFA Interpolation |
EE465: Introduction to Digital |
30 |
Image Processing |
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