首页> 外国专利> APPARATUS, METHOD AND PROGRAM FOR JPEG ENCODING WITH WATERMARK EMBEDDING, RECORD MEDIUM RECORDED WITH THE ENCODING PROGRAM, AND APPARATUS, METHOD AND PROGRAM FOR DETECTING TAMPERING OF THE JPEG IMAGE DATA WITH WATERMARK EMBEDDING, RECORD MEDIUM RECORDED WITH THE DETECTING PROGRAM

APPARATUS, METHOD AND PROGRAM FOR JPEG ENCODING WITH WATERMARK EMBEDDING, RECORD MEDIUM RECORDED WITH THE ENCODING PROGRAM, AND APPARATUS, METHOD AND PROGRAM FOR DETECTING TAMPERING OF THE JPEG IMAGE DATA WITH WATERMARK EMBEDDING, RECORD MEDIUM RECORDED WITH THE DETECTING PROGRAM

机译：用水印嵌入JPEG编码的装置，方法和程序，用编码程序记录的记录介质，以及用水印嵌入检测JPEG图像数据篡改的装置，方法和程序，用检测程序记录的记录介质

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摘要

PPROBLEM TO BE SOLVED: To provide a method capable of outputting JPEG (Joint Photographic Expert Group)image data embedded with a watermark having reduced image quality deterioration caused by embedding of digital watermarking data, and detecting tampering of the image data. PSOLUTION: In the JPEG encoding method, encoding processing is performed for digital watermarking data after quantization, using a predetermined error detection code, and error detection code data is generated (S307). An image component in which the error detection code data are embedded is selected (S308). DCT (Discrete Cosine Transform) blocks included in the selected image component are divided into groups so that the number of DCT blocks contained in one group becomes the same as the number of bits after error detection encoding (S309). The error detection code data are generated and embedded for each DCT block, based on the subset of quantized coefficients (S310). Then, processing after entropy compression is performed, and JPEG image data are outputted. In addition, error detection processing is performed for the JPEG image data. PCOPYRIGHT: (C)2009,JPO&INPIT

机译：

要解决的问题：提供一种方法，该方法能够输出嵌入有水印的JPEG（联合图像专家组）图像数据，该图像具有减小的数字质量的嵌入所引起的图像质量劣化，并能够检测图像数据的篡改。

解决方案：在JPEG编码方法中，使用预定的检错码对量化后的数字水印数据执行编码处理，并生成检错码数据（S307）。选择其中嵌入了错误检测代码数据的图像成分（S308）。将包括在选择的图像分量中的DCT（离散余弦变换）块划分为组，使得在一组中包含的DCT块的数量变得与检错编码之后的位数相同（S309）。基于量化系数的子集，为每个DCT块生成并嵌入检错码数据（S310）。然后，执行熵压缩之后的处理，并且输出JPEG图像数据。另外，对JPEG图像数据执行错误检测处理。

版权：（C）2009，日本特许厅＆INPIT 展开▼

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公开/公告号JP2009124300A

专利类型
公开/公告日2009-06-04

原文格式PDF
申请/专利权人 NIPPON TELEGR & TELEPH CORP NTT;
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申请/专利号JP20070294183
发明设计人 KITAHARA AKIRA;KAWAMURA HARUMI;KATAYAMA ATSUSHI;
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申请日2007-11-13
分类号H04N1/387;G06T1/00;
国家 JP
入库时间 2022-08-21 19:40:56

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