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Wavelab Toolbox >> Wavelab Toolbox > Interpolating Refinements and Wavelet Transforms > HCoarsen2d

HCoarsen2d

2-d Coarsening operator based on Haar Pyramid

Calling Sequence

coarse = HCoarsen2d(fine,L)

Parameters

Inputs:

fine:

2-d image on fine grid

L :

integer >= 1. number of dyadic coarsenings

Outputs:

coarse:

2-d image on coarse grid

Description

Two-by-Two quads of blocks are replaced by single blocks having the average value of the quad. This is repeated through L generations. Starting from data on a grid of n*n points, delivers averages on a coarser grid of n/2^L * n/2^L points.

See also

Authors

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