idwt_level_fn.m

it is used to find traffic

function [Image_IDWT_Fn] = IDWT_Level_Fn(LL_1,LL_2,HL_1,HL_2,LH_1,LH_2,HH_1,HH_2,Level);


[SS_Height SS_Width]   = size(HH_1);
Image_Height    = 2*SS_Height;
Image_Width     = 2*SS_Width;
if(Level == 1)
    [Image_IDWT_Without_DC_Fn] = idwt2(LL_1,HL_1,LH_1,HH_1,'db1');
else
    [LL1] = idwt2(LL_2,HL_2,LH_2,HH_2,'db1');
    [Image_IDWT_Without_DC_Fn] = idwt2(LL1,HL_1,LH_1,HH_1,'db1');
end

% figure;
% imshow(Image_IDWT_Without_DC_Fn);

Image_IDWT_Fn = zeros(Image_Height,Image_Width);

for i = 1 : Image_Height
    for j = 1 : Image_Width
% % for i = 1 : 127
% %     for j = 1 : 127
        Image_IDWT_Fn(i,j) = double(Image_IDWT_Without_DC_Fn(i,j)) + 128;%(2^8); -- DC Shifting
    end
end

% figure;
% imshow(mat2gray(Image_IDWT_Fn)); title('Watermarked image_MATALAB');