How to image de-noise whit (Wavelet) using dwt3 and idwt3

Hello

I have implemented using dwt2 and idwt2

But I have not used dwt3 and idwt3 so far. Is it possible to help me with these commands to de-noiseize ??

Thank you

My code:

pic=imread('lena.jpg');

pic1=rgb2gray(pic);

pic11=im2double(pic1);

pic2 = imnoise(pic1,'gaussian',0.0001);

pic3=im2double(pic2);

%%%%%%Symlet%%%%%%%%%%%%

wavename='sym2';

[LoD,HiD]=wfilters(wavename,'d');

%First level

[cA,cH,cV,cD]=dwt2(pic3,LoD,HiD,'mode','per');

%Second level

[cAA,cAH,cAV,cAD]=dwt2(cA,LoD,HiD,'mode','per');

Level1=[Norm(cAA),Norm(cAH);Norm(cAV),Norm(cAD)];

pic4=([Level1,Norm(cH);Norm(cV),Norm(cD)]);

%%%%%%%%Inverse%%%%%%%%%%

Tr=0.3;

cAH1=cAH;cAH1(abs(cAH1)<Tr)=0;

cAV1=cAV;cAV1(abs(cAV1)<Tr)=0;

cAD1=cAD;cAD1(abs(cAD1)<Tr)=0;

cH1=cH;cH1(abs(cH1)<Tr)=0;

cV1=cV;cV1(abs(cV1)<Tr)=0;

cD1=cD;cD1(abs(cD1)<Tr)=0;

cAr=idwt2(cAA,cAH1,cAV1,cAD1,wavename,size(cA));

pic5=idwt2(cAr,cH1,cV1,cD1,wavename,size(pic3));

Level2=[Norm(cAA),Norm(cAH1);Norm(cAV1),Norm(cAD1)];

pic6=([Level2,Norm(cH1);Norm(cV1),Norm(cD1)]);

%%%%%%Soft Thresholding%%%%%%%

cAH2=abs(cAH1-Tr);

cAV2=abs(cAV1-Tr);

cAD2=abs(cAD1-Tr);

cH2=abs(cH1-Tr);

cV2=abs(cV1-Tr);

cD2=abs (cD1-Tr);

cAr2=idwt2(cAA,cAH2,cAV2,cAD2,wavename,size(cA));

pic7=idwt2(cAr2,cH1,cV1,cD1,wavename,size(pic3));

Level2=[Norm(cAA),Norm(cAH2);Norm(cAV2),Norm(cAD2)];

pic8=([Level2,Norm(cH2);Norm(cV2),Norm(cD2)]);