Digitální obrazová steganografie

This bachelor thesis deals with digital image steganography and implements some of the available methods. This thesis describes steganography on a general level, it's history and it's current form. It also shows it's classification according to the type of carrier, the classification of the methods according to the style of hiding data and the influence of the hidden information. The primary subject of this thesis is image steganography, where facts that allow imperceptibly hide data inside image are described. A great part of this thesis is dedicated to the characteristics of the methods, which we observe and to the methods themselves. All of the methods described are implemented in a graphical and console application. The created application provides multiple image formats for hiding. In the last part, testing is performed in terms of capacity, imperceptibility  and robustness.

steganography, digital steganography, image steganography, history, methods, steganogram, LSB, PVD, JSTEG, F3, F4, F5, Inverted LSB, Triple-A, EMD, DCT, JPEG, PNG, BMP, JFIF, robustnes, imperceptibility, testing, capacity, division, spatial methods, frequency methods