专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06298166B1 Image transformations in the compressed domain 失效
标题翻译：压缩域中的图像变换
公开(公告)号：US06298166B1
公开(公告)日：2001-10-02
申请号：US09052039
申请日：1998-03-30
申请人： Viresh Ratnakar , Victor Ivashin , Vasudev Bhaskaran
发明人： Viresh Ratnakar , Victor Ivashin , Vasudev Bhaskaran
IPC分类号： G06K936
CPC分类号： H04N19/48 , G06T3/60 , H04N19/90
摘要： Image processing techniques which involve direct manipulation of the compressed domain representation of an image to achieve the desired spatial domain processing without having to go through a complete decompression and compression process. The techniques include processing approaches for performing the eight operations in D4 (the dihedral group of symmetries of a square) on JPEG images using the discrete cosine transform (DCT) domain representation of the images directly. For a task such as image rotation by 90° (an operation in D4), DCT-domain based methods can yield nearly a five-fold increase in speed over a spatial-domain based technique. These simple compressed-domain based processing techniques are well suited to the imaging tasks that are needed in a JPEG-based digital still-camera system.
摘要翻译：图像处理技术涉及直接操纵图像的压缩域表示以实现期望的空间域处理，而不必经历完全的解压缩和压缩处理。这些技术包括使用图像的离散余弦变换（DCT）域表示直接在JPEG图像上执行D4中的八个操作（平方对称的二面体组）的处理方法。对于诸如图像旋转90°（D4中的操作）的任务，基于DCT域的方法可以在基于空间域的技术上产生几乎五倍的速度增加。这些简单的基于压缩域的处理技术非常适合于基于JPEG的数码相机系统中所需的成像任务。

2. 发明申请

US20050024387A1 LAPE: layered presentation system utilizing compressed-domain image processing 有权
标题翻译： LAPE：利用压缩域图像处理的分层呈现系统
公开(公告)号：US20050024387A1
公开(公告)日：2005-02-03
申请号：US10631072
申请日：2003-07-31
申请人： Viresh Ratnakar , Vasudev Bhaskaran
发明人： Viresh Ratnakar , Vasudev Bhaskaran
IPC分类号： G06T11/80 , G06T3/00 , G06T11/60 , G09G5/00 , G09G5/36 , G09G5/377
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.
摘要翻译：分层呈现系统（LAPE）包括对从包括主客户端和其他客户端的多个客户端接收的图像数据执行压缩域图像处理的服务器，以生成包含来自其他客户机的图像的合成图像，其中主图像来自主设备客户端在共享显示器上查看。系统的客户端可以将问题，评论和图形的形象添加到当前显示的图像中。添加的图像将与主图像一起处理，以生成合成图像，然后出现在共享显示屏上，也可能在每个客户端的单个显示屏上。处理包括根据需要缩放主图像/添加的图像，并将添加的图像混合和/或叠加到主图像上，以便增加但不使其模糊。包括网络协议，用于在服务器与每个客户端之间来回传送压缩域中的图像数据。

3. 发明授权

US06421468B1 Method and apparatus for sharpening an image by scaling elements of a frequency-domain representation 有权
标题翻译：通过缩放频域表示的元素来锐化图像的方法和装置
公开(公告)号：US06421468B1
公开(公告)日：2002-07-16
申请号：US09226370
申请日：1999-01-06
申请人： Viresh Ratnakar , Vasudev Bhaskaran
发明人： Viresh Ratnakar , Vasudev Bhaskaran
IPC分类号： H04N712
CPC分类号： G06T3/4084 , G06T5/003 , G06T5/10 , G06T2207/20192 , H04N1/4092 , H04N5/208
摘要： An original image is sharpened by obtaining a first frequency-domain representation of the original image, selecting one or more elements from this first representation based on one more criteria such as element magnitude and frequency, scaling the selected elements according to one or more scale factors, and forming a second frequency-domain representation by combining the scaled selected elements with the unselected elements of the first representation. A sharpened reproduction of the original image may be generated by applying an inverse transform to the second frequency-domain representation. A technique for deriving the value of the one or more scale factors is also discussed.
摘要翻译：通过获得原始图像的第一频域表示来锐化原始图像，基于诸如元素幅度和频率的多个标准从该第一表示中选择一个或多个元素，根据一个或多个比例因子对所选择的元素进行缩放，以及通过将缩放的所选择的元素与第一表示的未选择元素组合来形成第二频域表示。可以通过对第二频域表示应用逆变换来生成原始图像的锐化再现。还讨论了用于导出一个或多个比例因子的值的技术。

4. 发明授权

US07391910B2 LAPE: layered presentation system utilizing compressed-domain image processing 有权
标题翻译： LAPE：利用压缩域图像处理的分层呈现系统
公开(公告)号：US07391910B2
公开(公告)日：2008-06-24
申请号：US10631072
申请日：2003-07-31
申请人： Viresh Ratnakar , Vasudev Bhaskaran
发明人： Viresh Ratnakar , Vasudev Bhaskaran
IPC分类号： G06K9/36 , G09G5/00 , G06K9/46
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.
摘要翻译：分层呈现系统（LAPE）包括对从包括主客户端和其他客户端的多个客户端接收的图像数据执行压缩域图像处理的服务器，以生成包含来自其他客户机的图像的合成图像，其中主图像来自主设备客户端在共享显示器上查看。系统的客户端可以将问题，评论和图形的形象添加到当前显示的图像中。添加的图像将与主图像一起处理，以生成合成图像，然后出现在共享显示屏上，也可能在每个客户端的单个显示屏上。处理包括根据需要缩放主图像/添加的图像，并将添加的图像混合和/或叠加到主图像上，以便增加但不使其模糊。包括网络协议，用于在服务器和每个客户端之间来回传送压缩域中的图像数据。

5. 发明授权

US07050656B2 Image scaling in the compressed domain 失效
标题翻译：压缩域中的图像缩放
公开(公告)号：US07050656B2
公开(公告)日：2006-05-23
申请号：US10316362
申请日：2002-12-11
申请人： Vasudev Bhaskaran , Viresh Ratnakar
发明人： Vasudev Bhaskaran , Viresh Ratnakar
IPC分类号： G06K9/32
CPC分类号： G06T3/4023
摘要： An efficient compressed-domain-based algorithm that works by combining the IDCT and pixel-domain averaging into a single compressed domain operation, where a part of the cost of even this simplified operation can be absorbed into the de-quantization process. The original image need not be decompressed fully, only to the point of extracting the transform coefficients. Compressed-domain scaling for all scales k/8 for 1≦k≦8, including ⅜, ⅝, ¾, ⅞, is provided. By chaining multiple operations, any scale factors of the form k1k2 . . . kl/8l for integers ki's in the range [1,7] can be achieved.
摘要翻译：通过将IDCT和像素域平均组合成单个压缩域操作来工作的有效的基于压缩域的算法，其中甚至这种简化操作的成本的一部分可以被吸收到去量化过程中。原始图像不需要完全解压缩，只能提取变换系数。提供了1 <= k <= 8的所有尺度k / 8的压缩域缩放，包括3/8,5 / 8，¾，7/8。通过链接多个操作，可以使用形式k <1> 2 的任何比例因子。。。对于[1,7]范围内的整数k i i i，可以实现k 1/1/1/1。

6. 发明授权

US6064764A Fragile watermarks for detecting tampering in images 失效
标题翻译：用于检测图像中的篡改的脆弱水印
公开(公告)号：US6064764A
公开(公告)日：2000-05-16
申请号：US52041
申请日：1998-03-30
申请人： Vasudev Bhaskaran , Viresh Ratnakar
发明人： Vasudev Bhaskaran , Viresh Ratnakar
IPC分类号： H04N7/26 , G06T1/00 , H04N1/32 , H04N1/387 , G06K9/00
CPC分类号： G06T1/0042 , H04N1/32154 , H04N1/32187 , H04N1/32277 , H04N1/32283 , G06T2201/0052 , G06T2201/0061 , H04N2201/3236 , H04N2201/327 , H04N2201/3281
摘要： A watermarking scheme for images which includes techniques for inserting and extracting fragile 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 fragile 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.
摘要翻译：一种用于图像的水印方案，其包括用于在频域中插入和提取脆弱水印并且用于确定是否已经篡改了水印的图像的技术。通过将图像的散列函数的数字签名的比特嵌入图像的频率系数来实现水印插入。篡改检测通常如下完成：从图像中提取在水印插入过程中嵌入的脆弱水印; 图像的散列函数如插入过程那样计算; 使用公开密钥验证所提取的水印是否是哈希值的有效签名。如果是这样，那么确保图像没有被篡改。否则，有理由断定图像已被篡改。

7. 发明授权

US06233359B1 File size bounded JPEG transcoder (FSBJT) 有权
标题翻译：文件大小有限JPEG代码转换器（FSBJT）
公开(公告)号：US06233359B1
公开(公告)日：2001-05-15
申请号：US09183552
申请日：1998-10-29
申请人： Viresh Ratnakar , Victor Ivashin
发明人： Viresh Ratnakar , Victor Ivashin
IPC分类号： G06K936
CPC分类号： H04N19/132 , H04N19/146 , H04N19/18 , H04N19/40
摘要： A technique that reduces the size of an existing JPEG file or set of DCT coefficients to satisfy a certain bit budget by setting to zero coefficients whose magnitude is below a certain threshold and which occur after a certain ordinal number in the zig-zag scan. The cutoff ordinal number is chosen using a clever savings calculation strategy. This strategy is implemented by filling appropriate savings values in an array of savings values, Savings[1], . . . , Savings[63]. The value Savings[n] is exactly the number of bits saved by reducing the thresholding cutoff ordinal number from n +1 to n. When a non-zero coefficient is set to zero, bits are saved because two runs of zeros (the one preceding it and the one following it) get combined into a single, longer run of zeros. The exact number of bits saved can be calculated by adding the bits needed to code the previous and next runs, and subtracting the bits needed to code the combined run. Some special conditions (runs longer than 16 and end-of-block conditions) need to be carefully factored into the computation.
摘要翻译：一种减小现有JPEG文件或一组DCT系数的大小以通过将其设置为零幅度低于某一阈值并且在Z字形扫描中发生在某个序数之后的零系数来满足特定比特预算的技术。使用巧妙的储蓄计算策略选择截止序数。这种策略是通过在储蓄值[Saving] [1]中填充适当的储蓄值来实现的。。。，储蓄[63]。值Savings [n]正好是通过将阈值截止序数从n + 1减为n来节省的位数。当非零系数设置为零时，保存位，因为两次运行的零（之前的零和其后的一个）合并成一个较长的零运行。可以通过添加编码前一次和下一次运行所需的位，并减去编码组合运行所需的位，来计算确切的保存位数。一些特殊条件（运行时间长于16和块结束条件）需要仔细考虑到计算中。

8. 发明授权

US07046818B2 Standards compliant watermarking for access management 有权
公开(公告)号：US07046818B2
公开(公告)日：2006-05-16
申请号：US10010196
申请日：2001-11-30
申请人： Viresh Ratnakar , Onur G. Guleryuz
发明人： Viresh Ratnakar , Onur G. Guleryuz
IPC分类号： G06K9/00
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.

9. 发明申请

US20050024486A1 Video codec system with real-time complexity adaptation 审中-公开
标题翻译：具有实时复杂度适应的视频编解码系统
公开(公告)号：US20050024486A1
公开(公告)日：2005-02-03
申请号：US10631155
申请日：2003-07-31
申请人： Viresh Ratnakar , William Chen
发明人： Viresh Ratnakar , William Chen
IPC分类号： H04N7/32 , H04N7/26 , H04N7/30 , H04N7/14
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，使得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。在其中多个视频编解码器必须同时实时操作的系统中，共享系统的可用资源，本发明提供了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个体解码器。

10. 发明授权

US06625309B1 Image partitioning to avoid overlap transmission 失效
标题翻译：图像分割以避免重叠传输
公开(公告)号：US06625309B1
公开(公告)日：2003-09-23
申请号：US09408108
申请日：1999-09-29
申请人： Chia-Hsin Li , Viresh Ratnakar
发明人： Chia-Hsin Li , Viresh Ratnakar
IPC分类号： G06K934
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实现的图像分割方法分割要发送的多个重叠图像的集合，使得仅传输图像的可见部分。底层划分算法使用矩形来迭代地分割图像集。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式