0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030 function dev=function_stdEst2D(z,method)
0031
0032 if nargin==1
0033 method=2;
0034 end
0035 if min(abs(method-[0 1 2 3 4 7 8]))>0
0036 disp(' ');disp(' !!!!! Second argument must be either 0, 1, 2, 3, 4, 7, or 8. (see help)');disp(' ');
0037 return
0038 end
0039 if ndims(z)>2
0040 disp(' ');disp(' !!!!! Input has to be 1D vector or 2D image. ');disp(' ');
0041 return
0042 end
0043 size_z=size(z);
0044 if min(size_z(1:2))==1
0045 z=z(:);
0046 if method==0||method==1
0047 z1=circshift(z,[1 0]);
0048 dz=abs(z(2:end,:)-z1(2:end,:));
0049 dev=median(dz(:))/(0.6745*sqrt(2));
0050 end
0051 if method==2
0052 daub6kern=[0.03522629188571 0.08544127388203 -0.13501102001025 -0.45987750211849 0.80689150931109 -0.33267055295008]';
0053 wav_det=conv2(z,daub6kern,'same');
0054 dev=median(abs(wav_det(:)))/.6745;
0055 end
0056 if method==3
0057 daub6kern=[0.03522629188571 0.08544127388203 -0.13501102001025 -0.45987750211849 0.80689150931109 -0.33267055295008]';
0058 wav_det=conv2(z,daub6kern,'valid');
0059 dev=median(abs(wav_det(:)))/.6745;
0060 end
0061 if method==4
0062 LAPL=[1 -2 1]';
0063 LAPL=LAPL*sqrt(pi/2/sum(LAPL(:).^2));
0064 YY=conv2(z,LAPL,'valid');
0065 dev=mean(abs(YY(:)));
0066 end
0067 if method==7
0068 daub6kern=[0.03522629188571 0.08544127388203 -0.13501102001025 -0.45987750211849 0.80689150931109 -0.33267055295008]';
0069 LAPL=conv(daub6kern,daub6kern);
0070 YY=conv2(z,daub6kern*sqrt(pi/2/sum(LAPL(:).^2)),'valid');
0071 YY=conv2(YY,daub6kern,'valid');
0072 dev=mean(abs(YY(:)));
0073 end
0074 if method==8
0075 daub6kern=[0.03522629188571 0.08544127388203 -0.13501102001025 -0.45987750211849 0.80689150931109 -0.33267055295008]';
0076 LAPL=conv2(daub6kern,daub6kern);
0077 YY=conv2(z,daub6kern*sqrt(pi/2/sum(LAPL(:).^2)),'valid');
0078 YY=conv2(YY,daub6kern,'valid');
0079 LL=16;
0080 NB1=floor(size(YY,1)/LL);
0081 YY=YY(1:NB1*LL);
0082 dev=median(mean(abs(reshape(YY,[LL NB1])),1));
0083 end
0084 else
0085 if method==0
0086 z1=circshift(z,[1 0]);
0087 dz=abs(z(2:end,:)-z1(2:end,:));
0088 dev=median(dz(:))/(0.6745*sqrt(2));
0089 z2=circshift(z,[0 1]);
0090 dz=abs(z(:,2:end)-z1(:,2:end));
0091 dev=0.5*dev+0.5*median(dz(:))/(0.6745*sqrt(2));
0092 end
0093 if method==1
0094 z1=circshift(z,[1 0]);
0095 dz=z(2:end,:)-z1(2:end,:);
0096 dev=median(dz(:))/(0.6745*sqrt(2));
0097 z1=circshift(dz,[0 1]);
0098 dz=abs(dz(:,2:end)-z1(:,2:end));
0099 dev=median(dz(:))/(0.6745*2);
0100 end
0101 if method==2
0102 daub6kern=[0.03522629188571 0.08544127388203 -0.13501102001025 -0.45987750211849 0.80689150931109 -0.33267055295008];
0103 daub6kern=daub6kern(end:-1:1);
0104 wav_det=conv2(z,daub6kern,'same');
0105 wav_det=conv2(wav_det,daub6kern','same');
0106 dev=median(abs(wav_det(:)))/.6745;
0107 end
0108 if method==3
0109 daub6kern=[0.03522629188571 0.08544127388203 -0.13501102001025 -0.45987750211849 0.80689150931109 -0.33267055295008];
0110 wav_det=conv2(z,daub6kern,'valid');
0111 wav_det=conv2(wav_det,daub6kern','valid');
0112 dev=median(abs(wav_det(:)))/.6745;
0113 end
0114 if method==4
0115 LAPL=[1 -2 1;-2 4 -2;1 -2 1];
0116 LAPL=LAPL*sqrt(pi/2/sum(LAPL(:).^2));
0117 YY=conv2(z,LAPL,'valid');
0118 dev=mean(abs(YY(:)));
0119 end
0120 if method==7
0121
0122 daub6kern=[0.03522629188571 0.08544127388203 -0.13501102001025 -0.45987750211849 0.80689150931109 -0.33267055295008];
0123 LAPL=conv2(daub6kern,daub6kern);
0124 LAPL=conv2(LAPL,daub6kern');
0125 LAPL=conv2(LAPL,daub6kern');
0126
0127 YY=conv2(z,daub6kern*sqrt(pi/2/sum(LAPL(:).^2)),'valid');
0128 YY=conv2(YY,daub6kern,'valid');
0129 YY=conv2(YY,daub6kern','valid');
0130 YY=conv2(YY,daub6kern','valid');
0131 dev=mean(abs(YY(:)));
0132 end
0133 if method==8
0134
0135 daub6kern=[0.03522629188571 0.08544127388203 -0.13501102001025 -0.45987750211849 0.80689150931109 -0.33267055295008];
0136 LAPL=conv2(daub6kern,daub6kern);
0137 LAPL=conv2(LAPL,daub6kern');
0138 LAPL=conv2(LAPL,daub6kern');
0139 YY=conv2(z,daub6kern*sqrt(pi/2/sum(LAPL(:).^2)),'valid');
0140 YY=conv2(YY,daub6kern,'valid');
0141 YY=conv2(YY,daub6kern','valid');
0142 YY=conv2(YY,daub6kern','valid');
0143 LL=8;
0144 NB1=floor(size(YY,1)/LL);
0145 NB2=floor(size(YY,2)/LL);
0146 YY=YY(1:NB1*LL,1:NB2*LL);
0147 dev=median(mean(abs(YY(repmat(reshape(repmat([1:LL],[LL 1])'+repmat([0:LL*NB1:LL*LL*NB1-1]',[1 LL])',[LL*LL 1]) ,[1 NB1*NB2])+repmat(reshape(repmat([0:LL:NB1*LL-1],[NB2 1])+repmat(NB1*LL*[0:LL:NB2*LL-1]',[1 NB1]),[1 NB1*NB2]),[LL*LL 1]))),1));
0148
0149 end
0150 end
0151