公开(公告)号：US20030152225A1

公开(公告)日：2003-08-14

申请号：US10358227

申请日：2003-02-05

Applicant: Sanyo Electric Co., Ltd.

Inventor： Akiomi Kunisa

IPC: H04L009/00

CPC classification number: H04N19/467 ,  G06T1/0028 ,  G06T1/005 ,  G06T2201/0065 ,  G06T2201/0202 ,  H04N1/32149 ,  H04N1/32165 ,  H04N1/3232 ,  H04N7/1675 ,  H04N21/835 ,  H04N21/8358 ,  H04N2201/324 ,  H04N2201/3281

Abstract: An encoding apparatus that embeds a watermark in host data is provided. A multiplexer generates a plurality of bit sequences by adding initial data to the head of the watermark. A scrambler scrambles a plurality of the bit sequences respectively and generates a plurality of scrambled watermarks. An embedder embeds a plurality of the scrambled watermarks in the host data and generates a plurality of candidate watermarked host data. A signal-to-noise ratio calculator evaluates the robustness of the watermarks hidden in the respective candidate watermarked host data. A selector selects one candidate that has the highest level of the robustness as a final watermarked host data.

公开(公告)号：US20030135736A1

公开(公告)日：2003-07-17

申请号：US10317736

申请日：2002-12-12

Inventor： Jason Charles Pelly ,  Daniel Warren Tapson

IPC: H04L009/00

CPC classification number: H04N1/32154 ,  G06T1/005 ,  G06T2201/0052 ,  G06T2201/0063 ,  H04N1/32165 ,  H04N2201/324 ,  H04N2201/327

Abstract: A watermarking system comprises an encoding data processor operable to generate at least one marked version of an original item of material by introducing one of a predetermined set of code words into a copy of the original material item. The code words are generated from a pseudo-random number generator initialised with a seed value. The seed value is used to identify the marked material item, from the code word produced from the seed value. The watermarking system also includes a detecting data processor operable to identify a particular marked copy of the material item by recovering a code word from the marked material item and correlating all code words in the set of code words with the recovered code word. The detecting data processing apparatus also includes a registration processor operable to associate samples of the original material item with corresponding samples of the marked material item to which corresponding code word coefficients may have been added. By registering the original material item with the marked material item, a likelihood of correctly identifying the version of the marked material item is improved, reducing a false negative detection probability.

Abstract translation: 一种水印系统包括：编码数据处理器，可操作以通过将预定的一组代码字中的一个引入原始物料的副本来产生原始物料的至少一个标记版本。 码字由用种子值初始化的伪随机数生成器生成。 种子值用于从种子值生成的代码字中识别标记的物料项目。 水印系统还包括检测数据处理器，可操作以通过从所标记的物料项目中恢复代码字并将代码字集合中的所有代码字与所恢复的代码字相关联来识别物料项目的特定标记副本。 该检测数据处理装置还包括一个登记处理器，其可操作地将原始物料项目的样本与相应代码字系数可能被添加到的标记物料项目的对应样品相关联。 通过使用标记的物料项目登记原始物料项目，可以改善正确识别标记物料的版本的可能性，从而减少假阴性检测概率。

公开(公告)号：US20030131237A1

公开(公告)日：2003-07-10

申请号：US10035335

申请日：2002-01-04

Inventor： Ian R. Ameline ,  Alphonse L. Lopez

IPC: H04L009/00

CPC classification number: G06T1/0021 ,  H04N1/32203 ,  H04N1/32229 ,  H04N2201/324

Abstract: A visible digital watermark is applied to output images from a computer program. Various attributes of the watermark are modified from image to image, making the watermark difficult to remove. For example, a watermark indicating nullnot for commercial usenull can be applied to all output images from the program. Such watermarking permits full functioning demonstration versions of the computer program to be freely distributed to users while commercial use is inhibited. This is accomplished by a minimal level of intrusiveness to file sharing capabilities between a commercial version of the software and a non-commercial version of the software.

Abstract translation: 可视数字水印被应用于从计算机程序输出图像。 水印的各种属性从图像修改到图像，使得水印难以去除。 例如，指示“不用于商业用途”的水印可以应用于来自程序的所有输出图像。 这种水印允许计算机程序的全部功能演示版本被免费分发给用户，而商业使用被禁止。 这是通过对软件的商业版本和软件的非商业版本之间的文件共享功能的最小程度的干涉来实现的。

公开(公告)号：US20010030761A1

公开(公告)日：2001-10-18

申请号：US09826807

申请日：2001-04-06

Inventor： Hiriyuki Ideyama

IPC: B41J001/00 ,  G06K001/00 ,  G06K009/00 ,  B41B001/00

CPC classification number: G06T1/0028 ,  G06T2201/0051 ,  H04N1/00204 ,  H04N1/32144 ,  H04N1/32208 ,  H04N1/32529 ,  H04N2201/0082 ,  H04N2201/0089 ,  H04N2201/324 ,  H04N2201/327

Abstract: An image data processing apparatus that selects, as an output destination of image data, either a printer or a personal computer in accordance with an instruction from an operator. When the printer is selected as the output destination, a first pattern composed of high-density dots that is less influenced by noise during an image forming process is embedded as the additional information into the image data. When the personal computer is selected as the output destination, a second pattern composed of low-density dots is embedded as the additional information into the image data. The image data containing the additional information is output to the selected output destination.

Abstract translation: 根据来自操作员的指示，选择打印机或个人计算机作为图像数据的输出目的地的图像数据处理装置。 当选择打印机作为输出目的地时，将由图像形成处理中较少受噪声影响的高密度点组成的第一图案作为附加信息嵌入到图像数据中。 当选择个人计算机作为输出目的地时，将由低密度点构成的第二图案作为附加信息嵌入到图像数据中。 包含附加信息的图像数据被输出到所选择的输出目的地。

公开(公告)号：US20010010078A1

公开(公告)日：2001-07-26

申请号：US09767733

申请日：2001-01-24

Inventor： Scott A. Moskowitz

IPC: H04K001/02 ,  H04L009/00 ,  G06K009/36

CPC classification number: H04L9/14 ,  G06T1/0028 ,  G06T1/005 ,  G06T1/0057 ,  G06T1/0064 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0053 ,  G06T2201/0061 ,  G06T2201/0063 ,  G06T2201/0065 ,  G06T2201/0083 ,  H04L9/0819 ,  H04L2209/04 ,  H04L2209/043 ,  H04L2209/046 ,  H04N1/3216 ,  H04N1/32187 ,  H04N1/32309 ,  H04N2201/3233 ,  H04N2201/324

Abstract: Multiple transform utilization and applications for secure digital watermarking. In one embodiment of the present invention, digital blocks in digital information to be protected are transformed into the frequency domain using a fast Fourier transform. A plurality of frequencies and associated amplitudes are identified for each of the transformed digital blocks and a subset of the identified amplitudes is selected for each of the digital blocks using a primary mask from a key. Message information is selected from a message using a transformation table generated with a convolution mask. The chosen message information is encoded into each of the transformed digital blocks by altering the selected amplitudes based on the selected message information.

Abstract translation: 多变换利用和安全数字水印应用。 在本发明的一个实施例中，要保护的数字信息中的数字块使用快速傅立叶变换被变换到频域。 为每个变换的数字块识别多个频率和相关联的幅度，并且使用来自密钥的主掩模为每个数字块选择所识别的幅度的子集。 从使用卷积掩码生成的变换表的消息中选择消息信息。 所选择的消息信息通过基于所选择的消息信息改变所选择的幅度而被编码到每个变换的数字块中。