公开(公告)号：US06246777B1

公开(公告)日：2001-06-12

申请号：US09273055

申请日：1999-03-19

申请人： Saurabh Agarwal ,  Alok Aggarwal ,  Harpal Singh Bassali ,  Jatin Chhugani ,  Pradeep Kumar Dubey

发明人： Saurabh Agarwal ,  Alok Aggarwal ,  Harpal Singh Bassali ,  Jatin Chhugani ,  Pradeep Kumar Dubey

IPC分类号： G06K900

CPC分类号： G06T1/0057 ,  G06T2201/0051

摘要： A verification system for still images that embeds a watermark so that no visual artifacts are created in the images and thus maintains the visual quality of the image. The algorithm embeds information in an uncompressed image so as to later detect the alteration of the image, as well as the location of the alteration. The embedding of information into a source image is based on a defined mapping process. An image plane consists of macroblocks, which are themselves comprised of microblocks. A code is embedded corresponding to the value of this image property in each macroblock. The specific sequence of microblocks used for embedding this information in the watermarking image plane is a unique function of this property for the corresponding set of microblocks in the indexing image plane. This information can be later decoded from the stamped image. The watermark is embedded by combining the pixel values of the image with the watermark. The watermark is altered if the image is altered.

摘要翻译： 用于嵌入水印的静止图像的验证系统，使得在图像中不产生视觉伪影，从而保持图像的视觉质量。 该算法将信息嵌入到未压缩图像中，以便稍后检测图像的改变以及改变的位置。 将信息嵌入到源图像中是基于定义的映射过程。 图像平面由宏块组成，宏块本身由微块组成。 在每个宏块中嵌入与该图像属性的值相对应的代码。 用于将该信息嵌入水印图像平面中的微块的特定序列是该索引图像平面中相应的微块集合的该属性的唯一函数。 该信息可以稍后从加盖的图像中解码。 通过将图像的像素值与水印相结合来嵌入水印。 如果图像被改变，则改变水印。

公开(公告)号：US08869114B2

公开(公告)日：2014-10-21

申请号：US13299176

申请日：2011-11-17

申请人： Saurabh Agarwal

发明人： Saurabh Agarwal

IPC分类号： G06F9/44 ,  G06F9/445 ,  G06F11/36

CPC分类号： G06F11/3672 ,  G06F8/65

摘要： In accordance with embodiments, there are provided mechanisms and methods for facilitating customized overriding of data for maintenance of software applications in an on-demand services environment. In one embodiment and by way of example, a method includes duplicating first data of a first data set into a second data that is placed in a second data set. The first data relates to a software application at a computing device. The method may further include amending a portion of the second data at the second data set. The amended portion of the second data corresponds to an unchanged portion of the first data. The method may further include facilitating running of the software application based on the first data while referring to the amended portion of the second data and ignoring the corresponding unchanged portion of the first data.

摘要翻译： 根据实施例，提供了用于在按需服务环境中促进用于维护软件应用的数据的自定义覆盖的机制和方法。 在一个实施例中，作为示例，一种方法包括将第一数据集的第一数据复制到放置在第二数据集中的第二数据中。 第一数据涉及计算设备处的软件应用。 该方法还可以包括在第二数据集中修改第二数据的一部分。 第二数据的修改部分对应于第一数据的不变部分。 该方法还可以包括在参考第二数据的修改部分的同时基于第一数据促进软件应用的运行，并且忽略第一数据的对应的未改变部分。

公开(公告)号：US20110231833A1

公开(公告)日：2011-09-22

申请号：US12727535

申请日：2010-03-19

申请人： Kumaran NARAYANAN ,  Siva Madasamy ,  Aparna Adhav ,  Saurabh Agarwal ,  Kalash Nainwal

发明人： Kumaran NARAYANAN ,  Siva Madasamy ,  Aparna Adhav ,  Saurabh Agarwal ,  Kalash Nainwal

IPC分类号： G06F9/44 ,  G06F15/177

CPC分类号： G06F9/4416 ,  G06F8/656

摘要： Rolling software upgrades may be employed for a network device in a modular chassis and/or virtual chassis. The network device may include memory devices to store a software upgrade package and a group of instructions, and a processor. The processors may install the software upgrade package on a backup routing engine; determine subsets of multiple line cards on which to perform a software upgrade, where ports in each of the multiple line cards are part of a link aggregation group (LAG); initiate a reboot process for each of the subsets of multiple line cards, in sequence, where the reboot process for each of the line cards results in a software upgrade without deactivating any LAG. The processors may also switch the backup routing engine and a master routing engine to create a new master routing engine and a new backup routing engine, and install the upgrade package on the new backup routing engine.

摘要翻译： 可以对模块化机箱和/或虚拟机箱中的网络设备采用滚动软件升级。 网络设备可以包括用于存储软件升级包和一组指令的存储设备以及处理器。 处理器可以在备份路由引擎上安装软件升级包; 确定要执行软件升级的多个线路卡的子集，其中多个线路卡中的每个线路的端口是链路聚合组（LAG）的一部分; 按顺序为多个线路卡的每个子集启动重新启动过程，其中每个线路卡的重新启动过程导致软件升级而不停用任何LAG。 处理器还可以切换备份路由引擎和主路由引擎，以创建新的主路由引擎和新的备份路由引擎，并将升级包安装在新的备份路由引擎上。

公开(公告)号：US20060129610A1

公开(公告)日：2006-06-15

申请号：US11008525

申请日：2004-12-09

申请人： Saurabh Agarwal ,  Rahul Garg ,  Meeta Gupta

发明人： Saurabh Agarwal ,  Rahul Garg ,  Meeta Gupta

IPC分类号： G06F17/30

CPC分类号： G06F11/1451

摘要： A method, apparatus and computer program product are disclosed for incrementally checkpointing the state of a computer memory in the presence of at least one executing software application at periodic instants. A secure hash function is periodically applied to each partitioned contiguous block of memory to give a periodic block hash value. At each periodic instant, a block hash value for each block is compared with a respective preceding block hash value to determine if said memory block has changed according to whether said block hash values are different. Only changed memory blocks are stored in a checkpoint record. The memory block sizes are adapted at each periodic instant to split changed blocks into at least two parts and to merge only two non-changed contiguous blocks at a time.

摘要翻译： 公开了一种方法，装置和计算机程序产品，用于在周期性时刻在存在至少一个执行软件应用的情况下递增地检查计算机存储器的状态。 周期性地对每个分区的连续的存储器块应用安全的散列函数以给出周期性的块哈希值。 在每个周期性时刻，将每个块的块哈希值与相应的先前块散列值进行比较，以根据所述块哈希值是否不同来确定所述存储块是否已经改变。 只有更改的内存块才被存储在检查点记录中。 存储器块大小在每个周期性时刻被适配，以将改变的块分成至少两个部分，并且一次仅合并两个未改变的连续块。