dddyadup.sci

小波分解源代码

function afine = DDDyadUp(beta,alfa,D,F,LEF,REF)
// DDDyadUp -- Interpolating UpSampling Operator
//  Usage
//    afine = DDDyadUp(beta,alfa,D,F,LEF,REF)
//  Inputs
//    beta    coarse-scale samples
//    alfa    midpoint deflections
//    D       degree of polynomial fit in interpolation
//    F       filter implementing DD-interpolation
//    LEF     left edge filter of DD-interpolation
//    REF     right edge filter of DD-interpolation
//  Outputs
//    afine   fine-scale samples
//
//  Description
//    Implements the Coarse-to-Fine phase of the interpolating
//    Wavelet Transform. Takes coarse scale samples and midpoint
//    corrections and synthesizes fine-scale samples.
//
//  See Also
//    IWT_DD, DDRefine, MakeDDFilter
// 
//  Copyright Aldo I Maalouf

	n = length2(beta);
	ahat = DDRefine(beta,D,F,LEF,REF);
	adif =  [zeros(1,n) ; alfa ]; adif = adif(:)';
	afine = ahat + adif;
	afine = afine ./sqrt(2);
	endfunction