METHOD FOR REVERSIBLE IMAGE WATERMARKING BASED ON INTEGER-TO-INTEGER WAVELET TRANSFORM

摘要

A watermark insertion method based on a fixed number wavelet transform for freely controlling the image quality and insertion information is provided to insert information and reduce the degradation of the image quality by inserting watermark in an integral wavelet domain. A block for location information matrices insertion is assigned for LSB(Least Significant Bit)(S100). A matrix P is generated for adaptively inserting a message bit and additional information(S200). Location information array data is inserted(S300). The location information matrix is constructed in the form of the location information matrices. A watermark message bit and additional information are inserted(S400). The additional information is the original copy message bit substituted in the insertion of the location information matrix.