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    Layered presentation system utilizing compressed-domain image processing
    2.
    发明公开
    Layered presentation system utilizing compressed-domain image processing 审中-公开
    在压缩域中层呈现系统与图像处理

    公开(公告)号：EP1503344A3

    公开(公告)日：2005-06-01

    申请号：EP04015683.8

    申请日：2004-07-02

    申请人： SEIKO EPSON CORPORATION

    发明人： Ratnakar, Viresh ,  Bhaskaran, Vasudev

    IPC分类号： G06T11/60

    CPC分类号： G06T11/60

    摘要： A layered presentation system (LAPE) includes a server that performs compressed-domain image processing on image data received from multiple clients including a master client and other clients to generate a composite image that incorporates imagery from the other clients with a master image from the master client for viewing on a shared display. The system's clients can add imagery in the form of questions, comments, and graphics to a currently displayed image. The added imagery is processed along with the master image to generate the composite image that then appears on the shared display and perhaps also on each client's individual display. The processing includes scaling the master image/added imagery, as required, and blending and/or overlaying the added imagery onto the master image so as to augment but not obscure it. A network protocol is included for sending image data in the compressed domain back and forth between the server and each of the clients.

    Standards compliant watermarking for access management
    3.
    发明公开
    Standards compliant watermarking for access management 有权
    标准 - 符合对访问管理水印

    公开(公告)号：EP1282074A3

    公开(公告)日：2004-10-06

    申请号：EP02015700.4

    申请日：2002-07-18

    申请人： SEIKO EPSON CORPORATION

    发明人： Ratnakar, Viresh ,  Guleryuz, Onur G.

    IPC分类号： G06T1/00

    CPC分类号： G06T1/005 ,  G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0203

    摘要： Visible watermarking techniques for digital images and video operate on decoded transform coefficients and maintain the watermarked data in the same compressed format as the original so that the watermarked data can be viewed with standard tools and applications. Moreover, for most of the techniques presented, the watermarked data has exactly the same compressed size as the original. The watermark can be inserted and removed using a key for applications requiring content protection. The watermark insertion and removal algorithms are very efficient and exploit some features of compressed data formats (such as JPEG and MPEG) which allow most of the work to be done in the compressed domain.

    Image partitioning to avoid overlap transmission
    4.
    发明公开
    Image partitioning to avoid overlap transmission 有权
    图像分区以避免重叠传输

    公开(公告)号：EP1089224A2

    公开(公告)日：2001-04-04

    申请号：EP00120299.3

    申请日：2000-09-28

    申请人： SEIKO EPSON CORPORATION

    发明人： Li, Chia-Hsin ,  Ratnakar, Viresh

    IPC分类号： G06T1/00 ,  G06T3/20 ,  G06K9/34

    CPC分类号： G06T15/40 ,  H04N1/3873

    摘要： Image partitioning methods, which may be implemented by software or hardware on a computer, partition a set of multiple overlapping images to be transmitted so that only the visible portions of the images are transmitted. The underlying partitioning algorithm uses rectangles to iteratively partition the image set.

    摘要翻译： 可以由计算机上的软件或硬件来实现的图像分区方法将要传输的一组多个重叠图像分区，以便仅传输图像的可见部分。 底层分区算法使用矩形来迭代地分区图像集。

    Watermarks for detecting tampering in images
    5.
    发明公开
    Watermarks for detecting tampering in images 审中-公开
    水印骗子检测图像

    公开(公告)号：EP0947953A3

    公开(公告)日：2001-01-03

    申请号：EP99301996.7

    申请日：1999-03-16

    申请人： SEIKO EPSON CORPORATION

    发明人： Bhaskaran, Vasudev ,  Ratnakar, Viresh

    IPC分类号： G06T1/00

    CPC分类号： G06T1/0042 ,  G06T2201/0052 ,  G06T2201/0061 ,  H04N1/32154 ,  H04N1/32187 ,  H04N1/32277 ,  H04N1/32283 ,  H04N2201/3236 ,  H04N2201/327 ,  H04N2201/3281

    摘要： A watermarking scheme for images which include techniques for inserting and extracting watermarks in the frequency domain and for determining whether an image so watermarked has been tampered with. Watermark insertion is accomplished by embedding the bits of a digital signature of a hash function of the image in the frequency coefficients of the image. Tamper detection is accomplished generally as follows: the watermark which was embedded during the watermark insertion process is extracted from the image; the hash function of the image is computed as in the insertion process; it is verified using a public key whether the extracted watermark is a valid signature of the hash value. If so, then there is assurance that the image has not been tampered with. Otherwise, there is reason to conclude that the image has been tampered with.

    Video codec system with real-time complexity adaptation
    10.
    发明公开
    Video codec system with real-time complexity adaptation 审中-公开
    System zur Videokodierung mit Echtzeitadaption derKomplexität

    公开(公告)号：EP1503595A2

    公开(公告)日：2005-02-02

    申请号：EP04015638.2

    申请日：2004-07-02

    申请人： SEIKO EPSON CORPORATION

    发明人： Ratnakar, Viresh ,  Chen, William

    IPC分类号： H04N7/26

    CPC分类号： H04N19/57 ,  H04N19/103 ,  H04N19/122 ,  H04N19/132 ,  H04N19/156 ,  H04N19/172 ,  H04N19/186 ,  H04N19/523

    摘要： An encoder/decoder (codec) is configured to cause the coding/decoding algorithms used by the codec to dynamically adapt according to the available computational resources in response to actual complexity measurements performed at run-time. In a system in which multiple video codecs have to operate simultaneously in real-time, sharing the system's available resources, this invention provides a way to increase the number of simultaneous codecs that can co-exist. The principles of the invention are also applicable to an individual encoder and an individual decoder.

    摘要翻译： 编码器/解码器（编解码器）被配置为响应于在运行时执行的实际复杂度测量，使编解码器使用的编码/解码算法根据可用的计算资源动态地适应。 在多个视频编解码器必须同时实时运行的系统中，共享系统的可用资源，本发明提供了一种增加可以共存的同时编解码器数量的方法。 本发明的原理也适用于单个编码器和单独的解码器。