Capacity Enlargement Of The PVD Steganography Method Using The GLM Technique
This is an incremental improvement for steganography methods, addressing the specific problem of embedding more data without significantly degrading image quality.
The paper tackled the trade-off between capacity and quality in steganography by combining Pixel Value Differencing and Gray Level Modification into a hybrid scheme, resulting in a 25% increase in capacity with only a 2% dB average decline in quality.
In most steganographic methods, increasing in the capacity leads to decrease in the quality of the stego-image, so in this paper, we propose to combine two existing techniques, Pixel value differencing and Gray Level Modification, to come up with a hybrid steganography scheme which can hide more information without having to compromise much on the quality of the stego-image. Experimental results demonstrate that the proposed approach has larger capacity while its results are imperceptible. In comparison with original PVD method criterion of the quality is declined by 2% dB averagely while the capacity is increased around 25%.