How can I choose multiple File by using UIGETFILE

I am using UIGETFILE to open multiple file in my Watermarking script, the script look like this:

 %host

 rgbimage=uigetfile('*.jpg,*.bmp','Choose Host Images','*.jpg');
figure;
imshow(rgbimage);
title('Original Picture');
[h_LL,h_LH,h_HL,h_HH]=dwt2(rgbimage,'haar');
img=h_LL;
red1=img(:,:,1);
green1=img(:,:,2);
blue1=img(:,:,3);
[U_imgr1,S_imgr1,V_imgr1]= svd(red1);
[U_imgg1,S_imgg1,V_imgg1]= svd(green1);
[U_imgb1,S_imgb1,V_imgb1]= svd(blue1);

 %watermark

 rgbimage=uigetfile('*.jpg,*.bmp','Choose Host Images','*.jpg');
figure;
imshow(rgbimage);
title('Watermark (to be embedded)');
[w_LL,w_LH,w_HL,w_HH]=dwt2(rgbimage,'haar');
img_wat=w_LL;
red2=img_wat(:,:,1);
green2=img_wat(:,:,2);
blue2=img_wat(:,:,3);
[U_imgr2,S_imgr2,V_imgr2]= svd(red2);
[U_imgg2,S_imgg2,V_imgg2]= svd(green2);
[U_imgb2,S_imgb2,V_imgb2]= svd(blue2);

 % watermarking

 S_wimgr=S_imgr1+(0.10*S_imgr2);
S_wimgg=S_imgg1+(0.10*S_imgg2);
S_wimgb=S_imgb1+(0.10*S_imgb2);

 wimgr = U_imgr1*S_wimgr*V_imgr1';
wimgg = U_imgg1*S_wimgg*V_imgg1';
wimgb = U_imgb1*S_wimgb*V_imgb1';

 wimg=cat(3,wimgr,wimgg,wimgb);
newhost_LL=wimg;

 %output

 rgb2=idwt2(newhost_LL,h_LH,h_HL,h_HH,'haar');
imwrite(uint8(rgb2),'Watermarkedss.jpg');
figure;imshow(uint8(rgb2));title('Watermarked Picture');

first file choosing works well, but i get error like:

 Index exceeds matrix dimensions.

 Error in embedd (line 13)
 green1=img(:,:,2);

help slove the problem, thanks before. :)

Answer 1

[dpb]

...
rgbimage=uigetfile('*.jpg,*.bmp','Choose Host Images','*.jpg');
imshow(rgbimage);

...uigetfile=('.jpg','Choose Image','.jpg') command, but when I use imread('image.jpg') the process work[s]...

uigetfile simply returns the filename you have selected; it does NOT open the file. You still need the imread call to read the file except pass it the filename you selected.

fname=uigetfile('*.jpg,*.bmp','Choose Host Images','*.jpg');
rgbimage=imread(fname);

See

doc uigetfile

for the details and examples of using it...

Sorry I missed noticing that earlier.

[dksmt]

BIG THAAAANKS, its WORKS.. I REALLY APRECIATE IT, IT TAKE ME NEARER TO MY GRADUATION DAY.. THANK YOU DUDE! Have you any socmed account? you will be my savior about MATLAB.. :D

Answer 2

[dpb]

...
[h_LL,h_LH,h_HL,h_HH]=dwt2(rgbimage,'haar');
img=h_LL;
red1=img(:,:,1);
green1=img(:,:,2);
...

   Error in embedd (line 13)
 green1=img(:,:,2);

This has nothing whatever to do with uigetfile nor the multiselect option therein.

This simply that the array h_LL returned from dwt2 apparently has only one plane.

What is

size(img) % ?

[dksmt]

I've expecting it, what do you mean:

size (img) % ?

sorry, I don't get it. so what I have to do to fix ths error?

[dpb]

You'll have to have a 3D array (image) object from which to select multiple planes; the error is that the 2nd and 3rd planes don't exist in the h_LL output from dwt2

By

size(img)

I mean to look at what the actual returned size is just to confirm what you're getting. Type it in at the command after the error and see what it returns.

I don't have the toolbox nor your data file even if did but if you're expecting a 3D rgb output from dwt2 you're being disappointed, clearly.

[dksmt]

This error appear when I use the uigetfile=('.jpg','Choose Image','.jpg') command, but when I use imread('image.jpg') the process work well, I don't understand if uigetfile affect the dwt2 proccess.. have you find this error before?