That's why i set: Spatial Filter Coefficients: 4 0 -1 0 -1 0 0 -1 0 0 4 0 -1 0 0 -1 0 -1Īlthough, i strongly believe that the values and its positions must be properly synchronized to each channel, however i need some definitions: (p.s. black box they give it inputs and get results back from it. So, on my channel selector box i have the channelsĬhannels List: C3 C4 Cz F3 F4 P3 P4 O1 O2 (9 channels)Īs i have 9 channels on my channel selector, i must have 18 values in the spatial coefficients. The extracting algorithm has the stego-image and seed K as inputs and generates the secret message as output. Sensitivity dependent results negative, jphide, and outguess(old) were changed according. the final output of the extraction process, the steganograme can suffer changes the. I wonder if my intuition is correct: from 10 channels to 20 values, does it make sense? steganography algorithms namely JSteg and OutGuess algorithms. To encode text into a jpg file named demo, and generate a new jpg named out, supply an encryption key and input text file to hide as follows: outguess. The channel selector box of the sample scenario contains:Ĭhannels List: C3 C4 FC3 FC4 C5 C1 C2 C6 CP3 CP4 (10 channels) So, I see the spatial filter coefficients are related to the input signal channels. I looked at the parameters of spatial filter box from a sample scenario of openvibe, see bellow: To encode text into a jpg file named 'demo', and generate a new jpg named 'out', supply an encryption key and input text file to hide as follows: outguess -k 'my secret key' -d hidden.txt demo. When creating the new JPEG, the default compression is 75 and can be set. Answer (1 of 2): Since the author is my compatriot at NetBSD, I don't like seeing this go unanswered. I wonder what values i need to put in the parameter 'spatial filter coefficients'. Outguess creates a new JPEG statistically equivalent to the one given as an input. Now i am trying to properly set the parameters according with the pre-recorded data i am using. Basically i already built the steps and placed all the boxes i need to work with.

Input outguess output