BLOCK BASED DATA HIDING METHOD FOR IMAGES

Abstract

In this article, a new block based data hiding method is presented. The proposed data hiding method uses non-overlapping blocks and this method consists of block type determination, data hiding and data extraction functions. The most significant bit of the secret data determines the block type. If the most significant bit of the secret data is 1, the block type is the odd, otherwise the block type is even. The other bits of secret data determine index of abnormal pixel. We use ±1 operator to set abnormal pixel and pre-processing in this paper. To extract secret data, we use index of abnormal pixel and block type. Capacity, execution time and visual quality parameters are used for measuring performance of the proposed method. Experimental results show that the proposed method is a successful data hiding method and that the proposed data hiding method can be used in methods such as image authentication, fragile watermarking etc.

Keywords

• Block based data hiding,image processing,information security

References

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