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公开(公告)号：KR1020120111669A
公开(公告)日：2012-10-10
申请号：KR1020110030302
申请日：2011-04-01
Applicant: 한국과학기술원
IPC: H04N19/467
CPC classification number: H04N19/467 , H04N19/172 , H04N19/176
Abstract: PURPOSE: A hybrid video forensic watermarking system is provided to stably extract inserted information even though the inserted information is transformed. CONSTITUTION: A forensic mark inserter(100) generates an insertion pattern using a weighted value in consideration of a robust forensic mark pattern, a fragile forensic mark pattern, and non-visibility. The forensic mark inserter inserts the generated insertion pattern into an original image. A forensic mark extractor(200) performs a correlation operation between a final presumptive pattern and a reference pattern. The forensic mark extractor extracts a robust mark pattern a fragile mark pattern. [Reference numerals] (100) Forensic mark inserter; (110) Robust mark pattern generating unit; (120) Fragile mark pattern generating unit; (130) Masking unit; (140) Mark pattern inserting unit; (200) Forensic mark extractor; (210) Mark pattern calculating unit; (220) Mark pattern accumulating unit; (230) Robust mark pattern extracting unit; (240) Fragile mark pattern generating unit
Abstract translation: 目的：提供混合视频取证水印系统，即使插入的信息被转换，也能稳定地提取插入的信息。 构成：法医标记插入器（100）考虑到强大的法医标记图案，脆弱的法医标记图案和不可见度，使用加权值生成插入图案。 法医标记插入器将生成的插入图案插入到原始图像中。 取样器（200）执行最终推定图案和参考图案之间的相关运算。 法医标记提取器提取鲁棒的标记图案脆弱的标记图案。 （附图标记）（100）法医标记插入器; （110）强大的标记图案生成单元; （120）脆弱标记图案生成单元; （130）屏蔽单元; （140）标记图案插入单元; （200）法定标记提取器; （210）标记图案计算单元; （220）标记图案累积单元; （230）鲁棒标记图案提取单元; （240）脆弱标记图案生成单元
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公开(公告)号：KR101054823B1
公开(公告)日：2011-08-05
申请号：KR1020090061260
申请日：2009-07-06
Applicant: 한국과학기술원
IPC: H04N5/913
Abstract: 본 발명은 위치오차 다양한 조도 환경에서의 워터마킹 시스템 및 그 방법에 관한 것으로서, 비밀키와 메시지를 이용하여, 한 프레임에 삽입할 워터마크 기본패턴을 생성하고, 기본패턴을 반복시킨 소정크기의 최종패턴을 생성하는 워터마크 생성부; 원본 영상 프레임을 바탕으로, 워터마크 삽입 위치에 해당하는 영역의 밝기 정보 데이터를 분석하여 복합적 마스킹 값을 구하는 마스킹부; 상기 마스킹부를 통해 계산된 각각의 가중치를 이용하여 최종적인 복합적 마스킹 가중치를 계산하는 복합적 마스킹 가중치 계산부; 및 상기 복합적 마스킹 가중치 계산부를 통해 계산된 값을 바탕으로, 원본 영상 프레임을 더해 워터마크 삽입 프레임를 생성하는 워터마크 삽입부; 를 포함하는 것을 특징으로 한다.
워터마크, 복합적 마스킹, 가중치Abstract translation: 本发明是所述位置误差，使用秘密密钥和消息涉及一种电子水印系统和方法在各种照明条件下，端部的给定的，其产生在一个帧中要被插入水印的基本模式，并且重复该基本图案的尺寸 水印生成单元，用于生成图案; 掩蔽单元，用于基于原始图像帧分析与水印嵌入位置对应的区域的亮度信息数据，以获得复数掩蔽值; 复合掩蔽权重计算单元，用于使用通过掩蔽单元计算的每个权重来计算最终的复数掩蔽权重; 以及水印插入器，用于基于通过复数掩蔽权重计算器计算的值来添加源图像帧以生成水印插入帧; [0015]
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公开(公告)号：KR101271197B1
公开(公告)日：2013-06-07
申请号：KR1020110107335
申请日：2011-10-20
Applicant: 한국과학기술원
IPC: H04N21/8358
Abstract: 본 발명은 가로축 노이즈 평균이동을 이용한 워터마킹 시스템에 관한 것으로서, 워터마크를 노이즈 형태로 삽입함으로써 비가시성을 만족시킬 뿐 아니라, 중앙, 좌안, 우안 영상 모두에 대한 저작권을 보호하도록 하며, 2차원-3차원 변환에 불변한 특징인 가로축 노이즈의 평균이동을 이용하여 워터마크를 삽입함으로써 사용자가 임의로 설정한 깊이 정보 어디에서나 삽입된 워터마크를 검출할 수 있도록 함에 그 목적이 있다.
이러한 목적을 달성하기 위한 본 발명은, 중앙 영상의 노이즈 분포의 평균을 이동시켜 워터마크 신호를 삽입하는 워터마크 삽입기; 검출 대상영역에서 추출된 노이즈 기둥에서 평균 계산을 통해 워터마크 신호를 추출하며, 추출한 워터마크 신호와, 상기 참조 워터마크 신호 사이의 정규상관계수와 임계값과의 비교를 통해 워터마크 신호를 검출워터마크 검출기; 를 포함한다.-
公开(公告)号：KR1020110003809A
公开(公告)日：2011-01-13
申请号：KR1020090061260
申请日：2009-07-06
Applicant: 한국과학기술원
IPC: H04N5/913
CPC classification number: H04N5/913 , G06T1/005 , H04N19/176 , H04N19/467 , H04N2005/91335
Abstract: PURPOSE: A watermarking system in various illumination environment for improving geometric transformation attack and D-A/A-D conversion attack in the use of a watermark expansion repetition pattern is provided to insert the watermark in an area of low noise by using the complex masking. CONSTITUTION: A watermark generator(100) generates a watermark basic pattern. A masking unit(200) analyzes brightness information data of a watermark insertion position. The masking unit obtains a complex masking value. A complex masking weight calculator(300) calculates the complex masking weight. A watermark insertion unit(400) generates a watermark insertion frame.
Abstract translation: 目的：提供使用水印扩展重复模式改善几何变换攻击和D-A / A-D转换攻击的各种照明环境中的水印系统，通过复杂掩蔽将水印插入低噪声区域。 构成：水印生成器（100）生成水印基本图案。 掩蔽单元（200）分析水印插入位置的亮度信息数据。 掩蔽单元获得复掩蔽值。 复掩蔽权重计算器（300）计算复掩蔽权重。 水印插入单元（400）生成水印插入框。
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公开(公告)号：KR1020090092402A
公开(公告)日：2009-09-01
申请号：KR1020080017632
申请日：2008-02-27
Applicant: 한국과학기술원
IPC: H04N5/913
CPC classification number: G06T1/0028 , G06T3/403 , G06T5/002 , G06T7/13 , G06T2201/0065 , G06T2207/10016 , G06T2207/20024
Abstract: A video watermarking system using the dithering technique and human visual model is provided to simplify the human visual modeling and applying the dithering technique for non visual property, thereby improving the recognition quality of a watermarked video. A watermark embedding module(100) comprises the followings: a pattern generator(110) for forming a basic pattern; a dithering unit(130) for reducing the artifact to improve the visual quality of a low frequency watermark; and a watermark embedding unit(150) for adding the dithered watermark to a host video frame and outputting a watermarked frame.
Abstract translation: 提供了使用抖动技术和人类视觉模型的视频水印系统，以简化人类可视化建模，并对非视觉特性应用抖动技术，从而提高水印视频的识别质量。 水印嵌入模块（100）包括：用于形成基本图案的图案生成器（110）; 用于减少伪影以改善低频水印的视觉质量的抖动单元（130）; 和水印嵌入单元（150），用于将抖动水印加到主视频帧并输出加水印的帧。
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Patent Agency Ranking
公开(公告)号：KR101554811B1
公开(公告)日：2015-09-21
申请号：KR1020140004077
申请日：2014-01-13
Applicant: 한국과학기술원
Abstract: 영상의국부영역에대한복사및 이동변조탐지방법은복수의블록들을획득하기위하여, 영상에대한블록화를수행하는단계; 상기복수의블록들각각에대한블록특징점의벡터값을계산하는단계; 및상기복수의블록들각각에대해, 상기벡터값을이용하여변조된블록들을선택하는단계를포함한다.
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公开(公告)号：KR1020150084251A
公开(公告)日：2015-07-22
申请号：KR1020140004077
申请日：2014-01-13
Applicant: 한국과학기술원
Abstract: 영상의국부영역에대한복사및 이동변조탐지방법은복수의블록들을획득하기위하여, 영상에대한블록화를수행하는단계; 상기복수의블록들각각에대한블록특징점의벡터값을계산하는단계; 및상기복수의블록들각각에대해, 상기벡터값을이용하여변조된블록들을선택하는단계를포함한다.
Abstract translation: 用于检测关于图像的局部区域的复制和移动调制的方法包括：将图像划分成块以便可以获得多个块的步骤; 计算每个多个块的块特性的矢量值的步骤; 以及通过使用多个块中的每一个上的向量值来选择调制块的步骤。
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公开(公告)号：KR101361108B1
公开(公告)日：2014-02-13
申请号：KR1020130012733
申请日：2013-02-05
Applicant: 한국과학기술원
CPC classification number: G06T1/0021 , G06T15/205 , G06T2207/10028 , G06T2207/20021
Abstract: The present invention relates to a watermarking system for a DIBR 3D image copyright protection and a method thereof, which includes: a watermark inserting unit (100) which divides an image into partial images and inserts a watermark through a quantization which is caused by a three-level dual tree complex wavelet transform (DT-CWT) about each partial image; and a watermark detecting unit (200) which extracts a watermark which is inserted into an image using a statistical difference which is generated by the quantization of a coefficient between DT-CWT coefficient sub-bands. The present invention like the aforementioned has an effect of preventing an illegal distribution of DIBR 3D content in advance by: dividing a central image into left and right eye images, applying a three-level DT-CWT about each of the partial images, and inserting a watermark by performing the quantization about a coefficient group of DT-CWT; and detecting the inserted watermark by utilizing the statistical difference which is generated by the quantization of the coefficient between the DT-CWT coefficient sub-bands.
Abstract translation: 本发明涉及一种用于DIBR 3D图像版权保护的水印系统及其方法，其包括：水印插入单元（100），其将图像划分为部分图像，并通过由三维图像引起的量化插入水印 关于每个部分图像的水平双树复小波变换（DT-CWT）; 以及水印检测单元（200），其使用通过DT-CWT系数子带之间的系数的量化生成的统计差异来提取插入到图像中的水印。 如上所述的本发明具有通过以下方式预防DIBR 3D内容的非法分配的效果：将中央图像划分为左眼图像和右眼图像，对每个部分图像应用三级DT-CWT，并插入 通过对DT-CWT的系数组进行量化来生成水印; 并通过利用由DT-CWT系数子带之间的系数的量化产生的统计差异来检测插入的水印。
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公开(公告)号：KR101363577B1
公开(公告)日：2014-02-17
申请号：KR1020120092266
申请日：2012-08-23
Applicant: 한국과학기술원
IPC: H04N21/8358
CPC classification number: H04N21/8358 , G06T2201/0065 , G06T2207/20064
Abstract: The present invention relates to a digital watermark detection function improving apparatus about a resampling attack and a method thereof, which includes: a watermark detector (110) which inspects whether a specific watermark is inserted into an input image or not; a conversion type determining unit (120) which extracts a specific point vector between the input image and an original image in order to draw the change type of the input image which failed in a watermark detection; a size/inverse conversion unit (130) which estimates a size conversion rate from the input image and converts the input image in order to be same as the original image by performing an inverse conversion about a transformed input image; and a rotation/inverse conversion unit (140) which estimates a rotation change rate from the input image and converts the input image in order to be same as the original image by performing an inverse conversion about the transformed input image. The present invention prevents the synchronization problem (an attack like a rotation and an amplification) of a digital watermark in advance by determining whether the size and rotation of an image is converted or not based on a specific point vector which is extracted from an image, estimating a size transformation and a rotation transformation which are added to the image afterward, and determining a watermark by inversely converting an image in which the watermark is inserted as much as the estimated transformation. [Reference numerals] (110) Watermark detector; (120) Change type discrimination unit; (140) Rotation/inverse conversion unit; (AA) Input image; (BB) Failure; (CC) Success; (DD) Watermark extraction; (EE) Rotation; (FF) Magnification
Abstract translation: 本发明涉及一种关于重采样攻击的数字水印检测功能改进装置及其方法，包括：水印检测器（110），其检查特定水印是否被插入到输入图像中; 转换类型确定单元，其提取输入图像和原始图像之间的特定点向量，以便画出在水印检测中失败的输入图像的改变类型; 尺寸/逆转换单元（130），其从输入图像估计尺寸转换率，并且通过执行关于变换的输入图像的逆变换来将输入图像转换为与原始图像相同; 以及旋转/逆转换单元，其从输入图像估计旋转变化率，并且通过执行关于变换的输入图像的逆变换来将输入图像转换为与原始图像相同。 本发明通过基于从图像提取的特定点向量确定图像的大小和旋转是否被转换来预先防止数字水印的同步问题（如旋转和放大的攻击） 估计随后添加到图像中的尺寸变换和旋转变换，并且通过将水印插入的图像与估计的变换反相变换来确定水印。 （附图标记）（110）水印检测器; （120）变更式辨别单元; （140）旋转/逆转换单元; （AA）输入图像; （BB）失败; （CC）成功; （DD）水印提取; （EE）旋转; （FF）放大率
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公开(公告)号：KR1020130043699A
公开(公告)日：2013-05-02
申请号：KR1020110107335
申请日：2011-10-20
Applicant: 한국과학기술원
IPC: H04N21/8358
CPC classification number: H04N21/8358 , H04N13/128
Abstract: PURPOSE: A watermarking system using horizontal noise mean shifting is provided to detect an embedded watermark in not only the center view but also each of left and right views which can be illegally distributed as monoscopic content, thereby fundamentally blocking illegal distribution of stereoscopic content. CONSTITUTION: A watermark insertion unit(100) inserts a watermark signal into a center view by shifting the mean of a noise distribution of the center view. A watermark detector(200) extracts the watermark signal by calculating the mean of an extracted noise bar which is extracted from a target detection region and then determines whether the watermark signal is detected by comparing the normalized correlation between a reference watermark signal and the extracted watermark signal to a threshold. [Reference numerals] (100) Watermark insertion device; (110) Noise image extracting unit; (120) Reference watermark signal generating unit; (130) Watermark insertion unit; (140) Insertion image acquisition unit; (200) Watermark detector; (210) Signal extracting unit; (220) Correlation coefficient calculating unit; (230) Image restoring unit
Abstract translation: 目的：提供一种使用水平噪声平均移位的水印系统，以便不仅可以将中心视图中的嵌入水印以及可以作为单视野内容非法分布的左右视图中的每一个进行检测，从而从根本上阻止立体内容的非法分发。 构成：水印插入单元（100）通过移动中心视图的噪声分布的平均值将水印信号插入中心视图。 水印检测器（200）通过计算从目标检测区域提取的提取的噪声条的平均值来提取水印信号，然后通过比较参考水印信号和提取的水印之间的归一化相关性来确定水印信号是否被检测 信号到阈值。 （附图标记）（100）水印插入装置; （110）噪声图像提取单元; （120）参考水印信号发生单元; （130）水印插入单元; （140）插入图像采集单元; （200）水印检测器; （210）信号提取单元; （220）相关系数计算单位; （230）图像恢复单元
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