Pattern Recognition and
Image Processing Group
Institute of Visual Computing and Human-Centered Technology
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The building of a Laplacian pyramid is described and demonstrated. Afterwards, multiresolution splines of two images are explained and demonstrated. Finally, for basic fovea a rudimentary fovea is formed within the Laplacian pyramid and shown in an animated demonstration.
A Laplacian pyramid can be obtained by subtracting each Gaussian pyramid level from the next lower level in the sequence. The levels differ in density.
Levels 1 - 2 - 3 - 4 - 5 - 6 - 7
Laplacian Pyramid Example
In this demonstration, we show seven levels and their histograms on building a Laplacian Pyramid. The original image shows the drill mask of a turntable. This image will be reduced step by step using a 2 x 2/4 pyramid.
This demonstration splines two images A and B using the following steps:
- Step 1: Laplacian pyramids LA and LB are constructed for images A and B
- Step 2: A third Laplacian pyramid LS is constructed (2N-1 denotes the center line):
- Step 3: The splined image S is obtained by expanding and summing the levels of LS
Multiresolution Splines Example
This demonstration splines two images. The result is shown by the lower animation which consists of seven levels.
2014 PRIP, Impressum
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