Data hiding in image using DCT
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Abstract
In this paper, an efficient stegnographic technique based on the discrete cosine transform (DCT) of image is proposed. In this technique, the DCT coefficient is quantized using a predefined mathematical operation then the secret bits is embedded in low and middle frequency component of the quantized DCT coefficient using least significant-bit (LSB) to enable a large message capacity. A comparison between the proposed technique and other existing technique is introduced. The results demonstrated that the performance of the proposed algorithm is satisfied compared to them.
Keywords: Steganography; Data hiding; DCT; LSB.
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