cujse Cankaya University Journal of Science and Engineering 2564-7954 Cankaya University Engineering Mühendislik İmge İçine Bilgi Gizlemede Kullanılan LSB Yöntemlerinin Karşılaştırması Saran Nurdan Olcay Cem 05 01 2013 10 1 05 01 2013 Copyright © 2009, Cankaya University Journal of Science and Engineering 2009 Cankaya University Journal of Science and Engineering

Digital image steganography techniques deal with three subjects lossy/losslesscompressed images, uncompressed images. Steganography techniques embed secret datapixel directly into uncompressed and lossless compressed cover images. The most populardata hiding method is, changing pixels’ left most digits or last two, known as LeastSignificant Bit (LSB). Lossless image formats like .bmp, .png, and 8-bit gray-scale .gif areusable for LSB methods. LSB embedding method is not usable for palette images becauseof changing just last bit of a pixel causes a big difference on image. After embedding all ofsecret message to palette image, Human Visual System (HVS) can detect manipulationson image. In this study, we compare some of the most popular LSB techniques; Chan’salgorithm [3], 2/3 efficient embedding [4], matrix embedding for large payloads [5], imageblocks method [6] and pixel-value differencing method [7]-[8].

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