公开(公告)号：US20100226527A1

公开(公告)日：2010-09-09

申请号：US12659364

申请日：2010-03-05

Applicant: Xiao-ping Zhang ,  Kan Li

Inventor： Xiao-ping Zhang ,  Kan Li

IPC: G06K9/00

CPC classification number: G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0202

Abstract: Method determining lookup table (“LUT”) for embedding watermark. For each quantization cell, calculating probabilities that signal point falls into cell. Selecting cell by probabilities. Setting LUT value to watermark value with largest probability, subject to run constraint. For remaining cells, repeating selecting and setting steps. Other method determining quantization ensemble by calculating probability density function for signal points where the watermark value to be embedded. Distortion and robustness functions are formulated. Given robustness or distortion is selected. Functions optimized, and ensemble of quantizers determined with parameters that comply. Other method quantizing in association with lossy compression. Strength of compression determined. Adapting strength of watermark with strength of compression by a mapping. Other method selecting points for embedding watermark. Determine threshold between large and small signal points using statistical method. Select signal points for embedding according to threshold. Also, processors, computer programs, and systems.

Abstract translation: 用于嵌入水印的方法确定查找表（“LUT”）。 对于每个量化单元，计算信号点落入单元格的概率。 按概率选择细胞。 将LUT值设置为具有最大概率的水印值，受制于运行约束。 对于剩余的单元格，重复选择和设置步骤。 其他方法通过对要嵌入的水印值的信号点计算概率密度函数来确定量化集合。 制定失真和鲁棒性功能。 给定鲁棒性或失真。 功能优化，量化器集合由符合的参数确定。 与有损压缩相关联的其他方法量化。 压缩强度确定。 通过映射适应压缩强度的水印强度。 嵌入水印的其他方法选择点。 使用统计方法确定大小信号点之间的阈值。 根据阈值选择嵌入信号点。 另外，处理器，计算机程序和系统。