how to extract feature using glcm and wavelet transform for lung cancer?

i have written some code for wavelet transform but unable to decide which matrix out of many is selected for feature extraction...can u help me extracting feature of lung cancer nodule..

clc;
clear all;
close all;
Input_Image=imread('C:\Users\SUMIT\Desktop\sampled image\451.jpg');
%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);

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

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


if true
%Read Input Image
Input_Image=imread('C:\Users\SUMIT\Desktop\decomp.jpg');
%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)=idwt2(LLr,LHr,HLr,HHr,'haar',size(Input_Image));
First_Level_Decomposition(:,:,2)=idwt2(LLg,LHg,HLg,HHg,'haar',size(Input_Image));
First_Level_Decomposition(:,:,3)=idwt2(LLb,LHb,HLb,HHb,'haar',size(Input_Image));
First_Level_Decomposition=uint8(First_Level_Decomposition);
%Display Image
figure;
subplot(1,2,1);imshow(Input_Image);title('Input Image');
subplot(1,2,2);imshow(First_Level_Decomposition,[]);title('Reconstructed image');
end

[KALYAN ACHARJYA]

i have written some code

You have written this code, then you know it better than us.