AN EFFICIENT M-ARY QIM DATA HIDING ALGORITHM FOR THE APPLICATION TO IMAGE ERROR CONCEALMENT

作者：Amit Phadikar; Santi P Maity

来源：International Journal of Network Security %26amp; Its Applications, 2010.

• Error Concealment
• Data Hiding
• M-ary modulation
• QIM
• Interpolation

Methods like edge directed interpolation and projection onto convex sets (POCS) that are widely used forimage 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 nothave sufficient computation power or done in online. In this paper, we propose a data-hiding scheme forerror concealment of digital image. Edge direction information of a block is extracted in the encoder andis embedded imperceptibly into the host media using quantization index modulation (QIM), thus reduceswork load of the decoder. The system performance in term of fidelity and computational load is improvedusing M-ary data modulation based on near-orthogonal QIM. The decoder extracts the embeddedfeatures (edge information) and those features are then used for recovery of lost data. Experimentalresults duly support the effectiveness of the proposed scheme.

• 出版日期2010