Secure High Capacity Data Hiding in Images using EDBTC

Block truncation coding is an efficient compression technique which has low computational complexity but it has two major issues like blocking and false counter effects .So here we have used error-diffused BTC that improves above deficiencies using visual low pass compensation on the bitmap. In this paper complementary hiding EDBTC is developed to resolve the above issue. In this project a single water mark is embedded and then multiple water marks are embedded .usually we use an adaptive external bias factor to embed the watermark but it damages the image quality and robustness .So here we use an extremely small bias factor to control the watermark embedding and this enables a high capacity scenario without significantly damaging image quality. Until now a few data hiding schemes are proposed but it damages the characteristics of BTC. The security of embedded water mark is high that it can’t be easy extracted by the malicious users. The watermark is encrypted by standard encryption algorithm and then it is embedded.