Hide Images In Image

Embedding Utility

Description

Embed/Hide one or more images inside one bigger image (source image).

Code also tells how much of the source image you are using for embedding and as long as it's less than 100 percent, you can obviously cramp in more images.

Hide n seek!!

• Required Products: Image Processing Toolbox
• MATLAB release: MATLAB 7.8 (R2009a)
• Other requirements: Large Images

[Kadi]

Hi

I dowloaded your program and was playing around with it. I took the image that you provided 'pano.jpg' and tried embedding it with a different image. I used a new image which was of size 480x640. The extraction algorithm was successful in extracting the embedded image but when I tried using this image as the source image and tried embedding it with one of the images that you provided I was getting an error message saying

Too Many Images or Too Big Image for Hiding [Used 341.7648 percent of the source image].

Your algorithms look simple and pretty straightforward. Is there any literature out there expliaing how you implemented this. I would like to know the idea behind the actual code.

Thanks and I appreciate your work.
Good Luck
Kadi

[Divakar Roy]

First of all, thanks a lot for reviews.

As said in the requirements, it needs larger source image for embedding smaller images. So if you are trying to use a small image as source image, it will throw error. Roughly the size of the image to be embedded inside the source image should be less than 1/8th of the source image.

Theory is quite simple: Every 8 pixels of source image are altered for each pixel of image to be embedded and that’s why that 1/8th requirement.

Cheers

Divakar

[Nikhil Gohil]

I'm using this file as a basis for a project on steganography. Could you please give me a place where i can find an explanation for the commands used and the algorithm here? I'm very new to matlab. Also, how would i go about writing a single GUI for both these files? In any case, thanks a lot for this file. It has been immensely helpful!

[Divakar Roy]

For explanation of commands, nothing better than "help function_name". Algorithm is simple and described in my previous comment. Regarding GUI making, you need to go through GUI tutorial, lots around here on File-exchange and outside as well.

[lavanya ananthan]

hi,
 i am having two images(jpg) of same size 512x512 .i want to hide one image into another image.
any code change required in your program?

[Divakar Roy]

Yes you can insert as many images as you want, as long as you are not using more than 100 percentage of the source image(see the screenshot). It was clearly said in the description.

[Hamsah]

Hi Mr. Divakar, Would u please tell me is it the LSB algorithm concept that you have been used in this program? by changing every 8pixel from the cover image? or what do u call your algorithm?

[Divakar Roy]

It's not exactly LSB-algorithm, it basically uses 8 pixels from source to form the 8bit of the embedded image. Idea was to minimize the change in the source, so that there is negligible change in it.

[sabir khan]

please give me some idea about how i hide an image into another image using matlab, please send me details code for encoding and decoding, i will be very gladful.
                    thanking you,

[amer jod]