steganography in jpeg

steganography in compressed images(jpeg),dc coeffs not touched

Description

data hasnt been embedded in dc coeffs,therefore results in a better histographic response.unlike methods like jsteg where quantized coeffs wid value 1 are not altered because they can be made equal to zero,here they can acquire a value of -1,instead.

• MATLAB release: MATLAB 7.0.1 (R14SP1)

[asma khan]

 

[mani kandan]

Sir,
it is great work...
but can u please send me the working principle and tell me how the code works and the procedure please....
It will be helpful for my project

send to [e-mail]

[Nor Aznim]

hello sir..

i'm doing image steganography and i am using DFT to get the coefficient. i have some probelms and questions here:
1. when i'm using fft, the coeffient is in imaginary number. so if i try to divide the value with the value in quantizer table, the number should be still in imaginary. then what should i do to get the real value only to easier for me to hide the hidden image into the coefficient?
2. from the example i've got from internet, they use fftshift and spatial image?

i'm very happy if you can reply my questions. thank you

[ramesh]

Hi sir,
Your work is very useful for my project. Thank you very much.
My project is jpeg steganalysis using multiclass SVM. Can you send me some tips to do that using MATLAB codes? Kindly pay some attention and please give me a solution for my project. Thank You. mail id: [e-mail]

[deeba malik]

your work is worth doing plz mail me the procedure of code at [e-mail]

[Jim Kidd]

Does somebody know the principle of this programme?Please send a e-mail to me!Thank you !My e-mail address is [e-mail].

[Jim Kidd]

Does it really realise the F5 algorithm?