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In most steganographic methods, increasing in the capacity leads to decreasein the quality of the stego-image, so in this paper, we propose to combine twoexisting techniques, Pixel value differencing and Gray Level Modification, tocome up with a hybrid steganography scheme which can hide more informationwithout having to compromise much on the quality of the stego-image.Experimental results demonstrate that the proposed approach has larger capacitywhile its results are imperceptible. In comparison with original PVD methodcriterion of the quality is declined by 2% dB averagely while the capacity isincreased around 25%.

Capacity Enlargement Of The PVD Steganography Method Using The GLM Technique