I have a question about steganography. Once the DCT matrix's are computed and the LSB's are replaced can we assume that the location at which the data is entered in the DCT of the cover image is know at the receiver? If not then how is the image reconstructed?
Using key positions in steganography using DCT
170 Views Asked by Gatsby Great At
1
There are 1 best solutions below
Related Questions in IMAGE
- Add image to JCheckBoxMenuItem
- Display images on Django Template Site
- How to resize images with PHP PARSE SDK
- Animation in Java on top of JPanel
- Slow performance on ipad erasing image
- What are the pros and cons of the picture element?
- Carrierwave file upload with different file types
- How to use annotorious with angular
- Images not showing when uploaded to server
- ImageView doesn't show up
- Image Resizing adjusts ratio
- Displaying bitmap image on Android (OpenCV)
- Class 'Imagick' not found - PHP and Windows
- Image position - randomly select position
- Replace image 1 with image 2 after 5 sec
Related Questions in IMAGE-PROCESSING
- Need help in detecting multiple blobs
- Image based steganography that survives resizing?
- WinRT Extract Thumbnail from RAW image format
- 3D B-Spline approximation
- Qualitative and Quantitative analysis of filtered back projection / iradon in matlab
- How to detect objects in an image based on colour?
- How to make sense (handle) when computes logarithm of zero in prior information
- scilab - Drawing bounding box
- Lowpass filter non working
- Get a single line representation for multiple close by lines clustered together in opencv
- error while drawing several x-marks on a binary image in matlab
- Which method should I use to find gradient direction of pixels in an image?
- Finding Circle Boundary Pixels Coordinates and RGB Intensity Values from An RGB Input Image in Matlab
- using SURF for handdetection
- Using only one tool from CLImageEditor
Related Questions in DCT
- Warning: IMSHOW(I,N) is an obsolete syntax. Your grayscale image will be displayed using 256 shades of gray
- Using key positions in steganography using DCT
- In getting back the matrix after applying Discrete cosine transform in Java
- Invert Discrete cosine transform (DCT) of an image
- Contributing to SciPy
- Fastest DCT? (With permissive license)
- Issues on DCT transform: results are incorrect
- 2D discrete cosine transform
- Finding number of quantizing layers in MATLAB
- Range in DCT coefficents MATLAB
- What is the "Law of the Eight"?
- DCT using integer only
- convert jpeg dct coefficients to ycbcr coefficients
- Decompose and recompose an image using dwt and dct
- Blackfin. 2D DCT/IDCT (image compression) with BF537 EZ-KIT, HOW TO WRITE TO FILE (on disk) reconstructed image (Raw pixel data) from BF537 memory?
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Generally speaking, the extraction method assumes the knowledge of the embedding rules so it can reverse them. Deterministic processes are hardcoded, while for stochastic processes you need to provide additional information to replicate their state.
For example:
If you modify a specific DCT coefficient in an 8x8 block, the extraction will have to know that.
If you hide a bit in either coefficient A, or B, based on some rule e.g, the lsb of some coefficient C, the extraction will do the same. That is, check what coefficient C says to decide whether to extract the data from coefficient A or B.
If the coefficient, or order of coefficients within a block, is determined by a prng, both the embedding and extracting processes have to initialise that with the same seed. That takes the form of a password which the receiver must know in order to read the correct sequence of coefficients to extract the data.
And so on, with more complex rules.