The watermark is2-bit image. People adaptively set the coefficients of each detail subband,select significant coefficients and quantize them from high scale level to low scale level.

• 自适应地确定嵌入系数的阈值,根据0/1水印值对3级小波系数,由高尺度层向低尺度层,有选择地进行细节图象系数的量化。