公开(公告)号：US5608458A

公开(公告)日：1997-03-04

申请号：US322893

申请日：1994-10-13

申请人： Homer H. Chen ,  Touradj Ebrahimi ,  Barin G. Haskell ,  Caspar Horne

发明人： Homer H. Chen ,  Touradj Ebrahimi ,  Barin G. Haskell ,  Caspar Horne

IPC分类号： G06T9/00 ,  H03M7/36 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/36 ,  H04N7/50

CPC分类号： H04N19/649 ,  H04N19/107 ,  H04N19/51 ,  H04N19/537 ,  H04N19/543 ,  H04N19/61 ,  H04N19/20

摘要： An encoder segments frames in a sequence of digital images into multiple regions of arbitrary shape each of which has a corresponding motion vector relative to a previous decoded frame. A hierarchical multi-resolution motion estimation and segmentation technique, which segments the frame into multiple blocks and which assigns a best motion vector to each block is used. Blocks having the same or similar motion vector are then merged to form the arbitrarily-shaped regions. The shape of each region is coded, and a decision is made to code additional image data of each region in one of three modes. In a first inter-frame mode, a motion vector associated with a region is encoded. In a second inter-frame mode, a prediction error for the region is also encoded. In an intra-frame mode, the intensity of each picture element in the region is encoded. A region interior coder with frequency domain region-zeroing and space domain region-enforcing operations is employed for effectively coding the interior image data of the arbitrarily-shaped regions. The region interior coder uses an iterative technique based on the theory of successive projection onto convex sets (POCS) to find the best values for a group of selected transform coefficients. The coded information, including the shape of the region, the choice of the mode, and the motion vector and/or the region's interior image data, may then be transmitted to a decoder where the image can be reconstructed.

摘要翻译： 编码器将数字图像序列中的帧划分为任意形状的多个区域，每个区域具有相对于先前解码的帧的相应运动向量。 使用分层多分辨率运动估计和分割技术，其将帧分割成多个块并且向每个块分配最佳运动矢量。 然后将具有相同或相似运动矢量的块合并以形成任意形状的区域。 编码每个区域的形状，并且决定以三种模式之一对每个区域的附加图像数据进行编码。 在第一帧间模式中，对与区域相关联的运动矢量进行编码。 在第二帧间模式中，还对该区域的预测误差进行编码。 在帧内模式中，对该区域中的每个像素的强度进行编码。 采用具有频域区域归零和空域域执行操作的区域内部编码器来有效地编码任意形状区域的内部图像数据。 区域内部编码器使用基于连续投影到凸集（POCS）的理论的迭代技术来找到一组选定的变换系数的最佳值。 然后可以将包括区域的形状，模式的选择以及运动矢量和/或区域的内部图像数据的编码信息发送到可以重建图像的解码器。

公开(公告)号：US20070296817A1

公开(公告)日：2007-12-27

申请号：US11631806

申请日：2005-07-07

申请人： Touradj Ebrahimi ,  Frederic Dufaux

发明人： Touradj Ebrahimi ,  Frederic Dufaux

IPC分类号： H04N7/18

CPC分类号： G08B13/19684 ,  G08B13/19667 ,  G08B13/19671 ,  G08B13/19686 ,  H04N7/18

摘要： This invention describes a video surveillance system which is composed of three key components 1—smart camera(s), 2—server(s), 3—client(s), connected through IP-networks in wired or wireless configurations. The system has been designed so as to protect the privacy of people and goods under surveillance. Smart cameras are based on JPEG 2000 compression where an analysis module allows for efficient use of security tools for the purpose of scrambling, and event detection. The analysis is also used in order to provide a better quality in regions of the interest in the scene. Compressed video streams leaving the camera(s) are scrambled and signed for the purpose of privacy and data integrity verification using JPSEC compliant methods. The same bit stream is also protected based on JPWL compliant methods for robustness to transmission errors. The operations of the smart camera are optimized in order to provide the best compromise in terms of perceived visual quality of the decoded video, versus the amount of power consumption. The smart camera(s) can be wireless in both power and communication connections. The server(s) receive(s), store(s), manage(s) and dispatch(es) the video sequences on wired and wireless channels to a variety of clients and users with different device capabilities, channel characteristics and preferences. Use of seamless scalable coding of video sequences prevents any need for transcoding operations at any point in the system.

摘要翻译： 本发明描述了一种视频监控系统，它由有线或无线配置通过IP网络连接的三个关键组件1-微型摄像机，2个服务器，3个客户端组成。 该系统的设计旨在保护受监视的人员和物品的隐私。 智能相机基于JPEG 2000压缩，其中分析模块允许有效使用安全工具来加扰和事件检测。 这个分析也被用来为现场感兴趣的地区提供更好的质量。 为保护和数据完整性验证，使用JPSEC兼容方法，离开摄像机的压缩视频流被加密和签名。 基于符合JPWL标准的方法也可以保护相同的比特流，以保证传输错误的鲁棒性。 优化智能相机的操作，以便在解码视频的感知视觉质量方面与功耗量相比提供最佳折中。 智能相机可以在电源和通信连接中都是无线的。 服务器接收，存储，管理和分发有线和无线信道上的视频序列给具有不同设备能力，信道特性和偏好的各种客户端和用户。 使用视频序列的无缝可扩展编码可以防止任何系统任何点的转码操作。

公开(公告)号：US5835237A

公开(公告)日：1998-11-10

申请号：US557132

申请日：1996-09-12

申请人： Touradj Ebrahimi

发明人： Touradj Ebrahimi

IPC分类号： G06T9/20 ,  H04N1/41 ,  H04N7/26 ,  H04N1/40

CPC分类号： G06T9/20 ,  H04N19/20 ,  H04N19/30

摘要： A video signal coding method and apparatus thereof and a video signal decoding apparatus of the present invention improves visual picture quality of a decoded image with higher compression rate than ever. A video signal (S1) is resolved into local luminance information composed of the smooth component, edge information composed of contour component, and texture information composed of component other than the smooth component and the contour component corresponding to each different visual importance. Then, the local luminance information is coded (S2) by a coding method which restores all of the local luminance information, the edge information is coded (S4) by a coding method by chain information and amplitude information, and the texture information is coded by a coding method having higher compression rate compared with the local luminance information (S2) and the edge information (S4). The coding can therefore be performed with higher compression rate than ever and in consideration of the visual picture quality of the restored image.

摘要翻译： PCT No.PCT / JP95 / 00781 Sec。 371日期：1996年9月12日 102（e）日期1996年9月12日PCT提交1995年4月20日PCT公布。 公开号WO95 / 29462 日期：1995年11月2日本发明的视频信号编码方法及其装置以及视频信号解码装置以比以往更高的压缩率提高解码图像的视觉画质。 视频信号（S1）被分解为由平滑分量，由轮廓分量组成的边缘信息和除了平滑分量以外的分量以及与每个不同视觉重要性对应的轮廓分量组成的纹理信息组成的局部亮度信息。 然后，通过利用链路信息和幅度信息的编码方法，对恢复所有局部亮度信息，边缘信息进行编码（S4）的编码方式对局部亮度信息进行编码（S2），并且纹理信息由 与局部亮度信息（S2）和边缘信息（S4）相比具有较高压缩率的编码方法。 因此，可以以比以往更高的压缩率执行编码，并且考虑到恢复的图像的视觉图像质量。

公开(公告)号：US06690725B1

公开(公告)日：2004-02-10

申请号：US09593819

申请日：2000-06-15

申请人： Yousri Abdeljaoud ,  Touradj Ebrahimi ,  Charilaos Christopoulos ,  Ignacio Mas Ivars

发明人： Yousri Abdeljaoud ,  Touradj Ebrahimi ,  Charilaos Christopoulos ,  Ignacio Mas Ivars

IPC分类号： H04N718

CPC分类号： G06T7/246

摘要： An algorithm for video summarization is described. The algorithm combines photometric and motion information. According to the algorithm, the correspondence between feature points is used to detect shot boundaries and to select key frames. Thus, the rate of feature points, which are lost or initiated, is used as an indication if a shot transition occurred or not. Key frames are selected as frames where the activity change is low.

摘要翻译： 描述了视频摘要的算法。 该算法结合了光度和运动信息。 根据该算法，特征点之间的对应关系用于检测镜头边界并选择关键帧。 因此，丢失或启动的特征点的速率被用作指示是否发生镜头转换。 关键帧被选为活动变化较低的帧。

公开(公告)号：US5594504A

公开(公告)日：1997-01-14

申请号：US271308

申请日：1994-07-06

申请人： Touradj Ebrahimi

发明人： Touradj Ebrahimi

IPC分类号： H04N7/32 ,  G06T9/20 ,  H03M7/36 ,  H04N7/26 ,  H04N7/24

CPC分类号： G06T9/20 ,  H04N19/543 ,  H04N19/20

摘要： An improved method and apparatus for prediction coding with motion estimation uses a hierarchical approach in which a motion vector updating routine is performed with respect to multiple levels of smaller and smaller regions of a frame. The motion vector updating routine updates the motion vector of a smaller region by assigning to it a best motion vector selected from among an initial motion vector assigned to the smaller region, motion vectors of neighboring regions, and a matched motion vector obtained by performing a block matching technique for the smaller region. The best motion vector for each region is selected according to a priority scheme and a predetermined threshold value. Adjacent regions having the same motion vector are then merged together, and a region shape representation routine is used to specify contour pixels that will allow the merged regions to be recovered by a decoder. A contour coding routine is then used to encode the contour pixels for transmission to the decoder.

摘要翻译： 用于具有运动估计的预测编码的改进方法和装置使用分层方法，其中相对于帧的较小和较小区域的多个级别执行运动矢量更新例程。 运动矢量更新例程通过向其分配从分配给较小区域的初始运动矢量，相邻区域的运动矢量和通过执行块所获得的匹配运动矢量中选择的最佳运动矢量来更新较小区域的运动矢量 较小区域的匹配技术。 根据优先方案和预定阈值选择每个区域的最佳运动矢量。 具有相同运动矢量的相邻区域然后被合并在一起，并且使用区域形状表示例程来指定将允许由解码器恢复合并区域的轮廓像素。 然后使用轮廓编码例程对轮廓像素进行编码以便传送到解码器。

公开(公告)号：US20080117295A1

公开(公告)日：2008-05-22

申请号：US11722755

申请日：2005-12-22

申请人： Touradj Ebrahimi ,  Frederic A. Dufaux

发明人： Touradj Ebrahimi ,  Frederic A. Dufaux

IPC分类号： H04N7/18

CPC分类号： G08B13/19684 ,  G06K9/00771 ,  G08B13/19604 ,  G08B13/19667 ,  G08B13/19671 ,  G08B13/19686

摘要： A video surveillance system is disclosed which addresses the issue of privacy rights and scrambles regions of interest in a scene in a video scene to protect the privacy of human faces and objects captured by the system. The video surveillance system is configured to identify persons and or objects captured in a region of interest of a video scene by various techniques, such as detecting changes in a scene or by face detection. In accordance with an important aspect of the invention regions of interest are automatically scrambled, for example, by way of a private encryption key, while the balance of the video scene is left in tact and is thus recognizable. Such region of interest scrambling provides distinct advantages over known code block scrambling techniques. The entire video scenes are then compressed, by one or more compression standards, such as JPEG 2000. In accordance with one aspect of the invention, the degree of scrambling can be controlled.

摘要翻译： 公开了一种视频监控系统，其解决了隐私权问题，并且扰乱了视频场景中场景中感兴趣的区域，以保护系统所捕获的人脸和对象的隐私。 视频监视系统被配置为通过诸如检测场景中的变化或通过脸部检测的各种技术来识别在视频场景的感兴趣区域中捕获的人物和/或物体。 根据本发明的一个重要方面，感兴趣的区域例如通过专用加密密钥自动加扰，而视频场景的平衡则保持平衡，从而可以识别。 这种感兴趣的区域扰乱比已知的码块加扰技术提供了明显的优点。 然后，通过一个或多个压缩标准（例如JPEG 2000）将整个视频场景压缩。根据本发明的一个方面，可以控制加扰的程度。

公开(公告)号：US06785332B1

公开(公告)日：2004-08-31

申请号：US09463053

申请日：2000-01-18

申请人： Martin Kutter ,  Frédéric Jordan ,  Touradj Ebrahimi

发明人： Martin Kutter ,  Frédéric Jordan ,  Touradj Ebrahimi

IPC分类号： H04N712

CPC分类号： H04N19/467 ,  H04N19/51

摘要： A method for marking a compressed digital video signal by embedding a digital signature in the compressed video signal, the signal representing a series of at least two video images, each image being divided into a plurality of regions, the signal including movement vectors representing the movement of the regions between the first and the second image, characterised in that it consists in modifying at least one of the coefficients X or Y of at least one of the movement vectors.

摘要翻译： 一种通过在压缩视频信号中嵌入数字签名来标记压缩数字视频信号的方法，所述信号表示一系列至少两个视频图像，每个图像被分成多个区域，所述信号包括表示运动的运动矢量 的第一和第二图像之间的区域，其特征在于，其包括修改至少一个运动矢量的系数X或Y中的至少一个。