AN EFFICIENT M-ARY QIM DATA HIDING ALGORITHM FOR THE APPLICATION TO IMAGE ERROR CONCEALMENT
Amit Phadikar1, Santi P. Maity 2
1Department of Information Technology, MCKV Institute of Engineering, Liluah,Howrah 711204, India.
2Department of Information Technology, Bengal Engineering and Science University,Shibpur, Howrah 711 103, India.
ABSTRACT
Methods like edge directed interpolation and projection onto convex sets (POCS) that are widely used for image error concealment to produce better image quality are complex in nature and also time consuming. Moreover, those methods are not suitable for real time error concealment where the decoder may not have sufficient computation power or done in online. In this paper, we propose a data-hiding scheme for error concealment of digital image. Edge direction information of a block is extracted in the encoder and is embedded imperceptibly into the host media using quantization index modulation (QIM), thus reduces work load of the decoder. The system performance in term of fidelity and computational load is improved using M-ary data modulation based on near-orthogonal QIM. The decoder extracts the embedded features (edge information) and those features are then used for recovery of lost data. Experimental results duly support the effectiveness of the proposed scheme.
KEY WORDS
Error Concealment, Data Hiding, M-ary modulation, QIM, Interpolation.
Original Source Link : http://airccse.org/journal/nsa/0710ijnsa12.pdf
No comments:
Post a Comment