wavedec2.m
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- % WAVEDEC2 丂懡廳儗儀儖偺2師尦僂僃乕僽儗僢僩暘夝
- %
- % [C,L] = WAVEDEC2(X,N,'wname') 偼丄暥帤楍 'wname'(WFILTERS 傪嶲徠)偱
- % 愝掕偝傟偨僂僃乕僽儗僢僩傪巊偭偰丄儗儀儖 N 偱峴楍 X 偺僂僃乕僽儗僢僩
- % 暘夝傪弌椡偟傑偡丅弌椡偼丄僂僃乕僽儗僢僩暘夝儀僋僩儖 C 偲偦偺挿偝傪
- % 梫慺偲偡傞峴楍 S 偱偡丅N 偼尩枾側堄枴偱偺惓偺惍悢偱側偔偰偼側傝傑偣傫
- % (WMAXLEV 傪嶲徠)丅
- %
- % 僂僃乕僽儗僢僩柤偺戙傢傝偵丄僼傿儖僞傪愝掕偡傞偙偲傕偱偒傑偡丅
- % [C,S] = WAVEDEC2(X,N,Lo_D,Hi_D) 偵懳偟偰丄
- % Lo_D 偼丄暘夝儘乕僷僗僼傿儖僞偱丄
- % Hi_D 偼丄暘夝僴僀僷僗僼傿儖僞偱偡丅
- %
- % 2師尦僂僃乕僽儗僢僩暘夝峔憿 [C,S] 偼丄僂僃乕僽儗僢僩暘夝儀僋僩儖 C
- % 偲偦偺戝偒偝傪梫慺偲偡傞峴楍 S 偐傜峔惉偝傟傑偡丅儀僋僩儖 C 偼丄
- % 偮偓偺傛偆偵慻傒崌傢偝傟傑偡丅
- %
- % C = [ A(N) | H(N) | V(N) | D(N) | ...
- % H(N-1) | V(N-1) | D(N-1) | ... | H(1) | V(1) | D(1) ].
- %
- % 偙偙偱丄A丄H丄V丄D 偼丄偮偓偺傛偆側峴儀僋僩儖偱偡丅
- % A = Approximation 學悢
- % H = 悈暯Detail 學悢
- % V = 悅捈Detail 學悢
- % D = 懳妏Detail 學悢
- %
- % 偦傟偧傟偺儀僋僩儖偼丄峴楍偱楍扨埵僗僩儗乕僕儀僋僩儖偱偡丅峴楍 S 偼丄
- % 偮偓偺撪梕傪娷傫偱偄傑偡丅
- % S(1,:) = Approximation 學悢(N)偺戝偒偝
- % S(i,:) = Detail 學悢(N-i+2)偺戝偒偝丄偙偙偱丄i = 2,...,N+1 偲
- % S(N+2,:) = size(X) 偱偡丅
- %
- % 嶲峫丗 DWT2, WAVEINFO, WAVEREC2, WFILTERS, WMAXLEV.
- % M. Misiti, Y. Misiti, G. Oppenheim, J.M. Poggi 12-Mar-96.
- % Copyright 1995-2002 The MathWorks, Inc.