A data embedding algorithm design for video applications using a new steganography approach

Steganography techniques, which have been recently emerged together with developments in computer technologies, are realized usually using computer softwares consisting of various mathematical algorithms. Many steganography techniques have been developed for the last decade. However, none of them is perfect and yet to be well developed or improved.In this thesis study, a hidden communication is performed by another video as hidden data is embedded into a cover video. Also, a new method which has a novel approach is suggested to reduce perceptibility of hidden data. This method has two steps. First, pixels appropriate for hiding data are compated in the cover video. And then hidden data replaces these pixels using a new coding technique.The pixels to embed the data are found using the histograms methods or the wavelength methods. In histograms methods, histogram values are calculated for each frame in the cover video and then, consecutive frame histogram values are compared with each other. As a result, it is decided which pixel is appropriate to hide data. The wavelength method, first finds out pixels near the 380nm or 780nm wavelength values in the cover video. Then, to embed the hidden data into these pixels, a new coding technique providing a large hidden data capacity is used.Peak Signal to Noise Ratio - (PSNR) parameter is used to assess stego-video quality as a statistical measure during the experimental works. In this thesis, mainly a high hidden data embedding capacity is aimed while keeping the perceptibility as low as possible.