how to write matlab code for third level DWT ?

hello..im writing a code for getting an image and perform dwt for one level to get 4 sub bands, ,but i want to apply third level DWT for getting image of 3rd level decomposion, so kindly help me and correct my code for 3rd level DWT. the code i have written is shown below.

 %Read Input Image

Input_Image=imread(‘rose.bmp’);

 %Red Component of Colour Image

Red_Input_Image=Input_Image(:,:,1);

 %Green Component of Colour Image

Green_Input_Image=Input_Image(:,:,2);

 %Blue Component of Colour Image

Blue_Input_Image=Input_Image(:,:,3);

 %Apply Two Dimensional Discrete Wavelet Transform

[LLr,LHr,HLr,HHr]=dwt2(Red_Input_Image,’haar’);

[LLg,LHg,HLg,HHg]=dwt2(Green_Input_Image,’haar’);

[LLb,LHb,HLb,HHb]=dwt2(Blue_Input_Image,’haar’);

First_Level_Decomposition(:,:,1)=[LLr,LHr;HLr,HHr];

First_Level_Decomposition(:,:,2)=[LLg,LHg;HLg,HHg];

First_Level_Decomposition(:,:,3)=[LLb,LHb;HLb,HHb];

First_Level_Decomposition=uint8(First_Level_Decomposition);

 %Display Image

subplot(1,2,1);imshow(Input_Image);title(‘Input Image’);

subplot(1,2,2);imshow(First_Level_Decomposition,[]);title(‘First Level Decomposition’);

[namita chandrakar]

hello.. can anyone solve this problem.

Answer 1

[nadhir nouioua]

Hello sir,

Here is a way of decomposition into third level, I think u can do the rest now, good luck.

[LLr1,LHr1,HLr1,HHr1]=dwt2(Red_Input_Image,’haar’);

[LLr2,LHr2,HLr2,HHr2]=dwt2(LLr1,’haar’);

[LLr3,LHr3,HLr3,HHr3]=dwt2(LLr2,’haar’);

[ghilani aya]

how to create in imshow?

[Asfaw Alem]

for 1-D signal decomposition