Image Upsampling via Imposed Edge Statistics

Resulting images page
(keep mouse over images for title popout)
(click on images to view in native resolution)


Comparison between Bicubic, Simple Edge Snsitive, New Edge-Directed and our method.
Left to right are: original image as a reference, its downsampling by 4 used as input for upsampling,
Bicubic Interpolation, our method's results, Simple Edge Sensitive (k=30) and New Edfe-Directed interpolations results.

Reference imageLow-Resolution InputBicubicNew MethodNEDISimple edge Sensitive

A comparison between the Example-Based Super-Resolution and our method
(child face magnified by 4 and teapot by a factor of 8).
Example-Based SP New Method Example-Based SP New Method
New method's result in color: left is using an outdoor edge statistics and the right on indoors.

Outdoors/Indoors

Features extracted from the image, left to right are:
first row, total intensity jump. distance from edge, (source image),
in second row, edge scattering, edge side and the resulting
sigma for a horizonal offset.
Outdoors

Camera Man
Total var.
Input pixels      Bicubic interp.(x5)
new method(x5)     Total Variation (x5)
[Aly and Dubois 2005]


Chip
x1x2x4x8
             x1                      x2                       x4                     x8

Old Man
x1x2x4x8
            x1                      x2                       x4                     x8

Can
x1x2x4x8
                     x1                                      x2                                    x4                                   x8

Angels
x1x2x4x8
         x1                      x2                       x4                     x8

Dog's Cartoon (some noise is present in input)
x1x2x4x8
             x1                      x2                     x4                      x8

Girl's Face
x1x2x4x8
          x1                      x2                       x4                     x8

Sculpture
x1x2x4x8
           x1                     x2                       x4                     x8

Child's Eye x16                  Armchair x16
x1x1
Comparison with commercial software
Cameraman(x4)
x1
Child's face
x1

Foliage Images
foliage1(x4)                                                 foliage2(x4)
x1 x1
foliage3(x4)                                                 foliage4(x4)
x1 x1