公开(公告)号：US07466845B2

公开(公告)日：2008-12-16

申请号：US11214255

申请日：2005-08-29

Applicant: Vasudev Bhaskaran ,  William Chen

Inventor： Vasudev Bhaskaran ,  William Chen

IPC: G06K9/00 ,  G06K9/54 ,  G06K9/60

CPC classification number: G06F17/30247 ,  G06T5/50 ,  Y10S707/99945 ,  Y10S707/99948

Abstract: An interactive photo system that provides an interesting and entertaining way to link photos from the digital and analog domains. The system enables easy conversion of a paper-based photo into digital form. The conversion process generally involves a user holding up a paper-based photo image in front of a camera of the system, such that the captured image is rendered in a specific location on a display screen. The system adjusts the captured image for orientation and illumination irregularities in creating a digital version of the paper-based photo. The system further includes a database of digital images and a content retrieval engine to which content from the just-converted digital image can be used as a search query to search the database for other similar digital photos.

Abstract translation: 交互式照片系统，提供有趣和有趣的方式来链接数字和模拟域的照片。 该系统可轻松将基于纸张的照片转换为数字形式。 转换过程通常涉及用户在系统的相机前面保持基于纸张的照片图像，使得捕获的图像被呈现在显示屏幕上的特定位置。 在创建基于纸张的照片的数字版本时，系统会调整捕获的图像以获取方向和照明不规则。 该系统还包括数字图像的数据库和内容检索引擎，来自刚刚转换的数字图像的内容可以用作搜索查询以在数据库中搜索其他类似的数字照片。

公开(公告)号：US07454692B2

公开(公告)日：2008-11-18

申请号：US11077102

申请日：2005-03-10

Applicant: Vasudev Bhaskaran

Inventor： Vasudev Bhaskaran

IPC: G06F11/00 ,  G08C25/00 ,  H03M13/00 ,  H04L1/00 ,  H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC classification number: H04N19/117 ,  H04N19/156 ,  H04N19/172 ,  H04N19/196 ,  H04N19/46 ,  H04N19/895

Abstract: Improved error resiliency of an encoding device, such as a video codec or encoder, operating in a compressed data transmission system, is achieved by enabling the encoding device to “shadow” or mimic the error conditions of a decoding device that receives and decodes compressed data sent by the encoding device. The encoding device is made aware of the specific error concealment scheme that the decoding device employs to reconstruct video frame data from a bit stream that contains bit or packet errors, and is also made aware of the location(s) in the frame to which the erroneous data corresponds and the particular manner in which the erroneous data was handled. The error-concealed data then can be used not only for the present encoding, but for subsequent encodings as well, to achieve synchronization between the encoder and decoder. Advantageously, the present invention improves on, but can work with, conventional error concealment schemes.

Abstract translation: 通过使编码设备能够“阴影”或模拟接收和解码压缩数据的解码设备的错误条件，来实现在压缩数据传输系统中操作的编码设备（例如视频编解码器或编码器）的改进的错误弹性 由编码设备发送。 使编码装置知道解码装置用于从包含位或分组错误的比特流重建视频帧数据的特定错误隐藏方案，并且还使得知道该帧中的位置 错误的数据对应以及处理错误数据的特定方式。 错误隐藏的数据不仅可以用于当前编码，而且可以用于后续编码，以实现编码器和解码器之间的同步。 有利地，本发明改进了传统的错误隐藏方案，但是可以适用于常规的错误隐藏方案。

公开(公告)号：US07190724B2

公开(公告)日：2007-03-13

申请号：US10319775

申请日：2002-12-13

Applicant: William Chen ,  Vasudev Bhaskaran

Inventor： William Chen ,  Vasudev Bhaskaran

IPC: H04B1/66

CPC classification number: H04N19/423 ,  H04N19/51 ,  H04N19/523 ,  H04N19/60 ,  H04N19/61

Abstract: A method for reducing the memory requirements for decoding a bit stream is provided. The method initiates with receiving a video bit stream. Then, a frame of the bit stream is decoded into a transform domain representation. Next, non-zero coefficients of the transform domain representation are identified. Then, a hybrid data structure is assembled. The hybrid data structure includes a fixed size array and a variable size overflow vector. Next, the non-zero coefficients of the transform domain representation are inserted into the hybrid data structure. A computer readable media, a printed circuit board and a device configured to decode video data are also provided.

Abstract translation: 提供了一种减少对位流进行解码的存储器要求的方法。 该方法通过接收视频比特流来启动。 然后，比特流的帧被解码成变换域表示。 接下来，识别变换域表示的非零系数。 然后，组装混合数据结构。 混合数据结构包括固定大小的数组和可变大小的溢出向量。 接下来，将变换域表示的非零系数插入到混合数据结构中。 还提供了计算机可读介质，印刷电路板和被配置为对视频数据进行解码的设备。

公开(公告)号：US20060165170A1

公开(公告)日：2006-07-27

申请号：US11041141

申请日：2005-01-21

Applicant: Changick Kim ,  William Chen ,  Vasudev Bhaskaran

Inventor： Changick Kim ,  William Chen ,  Vasudev Bhaskaran

IPC: H04N11/04 ,  H04N7/12 ,  H04B1/66 ,  H04N11/02

CPC classification number: H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/61

Abstract: A prediction mode for encoding data is selected using a reduced number of rate-distortion cost computations. This reduction in rate-distortion cost computations is caused by filtering the number of potential intra prediction modes based on two criteria. First, the number of potential prediction modes is reduced based on at least one characteristic of a quantization procedure performed during the encoding procedure. Second, the number of potential prediction modes is reduced based on an error value calculated for each of the potential prediction modes.

Abstract translation: 使用减少数量的速率失真成本计算来选择用于编码数据的预测模式。 速率失真成本计算的这种降低是通过基于两个标准过滤潜在的帧内预测模式的数量引起的。 首先，基于在编码过程期间执行的量化过程的至少一个特性来减少潜在预测模式的数量。 第二，基于为每个潜在预测模式计算出的误差值来减少潜在预测模式的数量。

公开(公告)号：US07050656B2

公开(公告)日：2006-05-23

申请号：US10316362

申请日：2002-12-11

Applicant: Vasudev Bhaskaran ,  Viresh Ratnakar

Inventor： Vasudev Bhaskaran ,  Viresh Ratnakar

IPC: G06K9/32

CPC classification number: G06T3/4023

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20060095398A1

公开(公告)日：2006-05-04

申请号：US10981355

申请日：2004-11-04

Applicant: Vasudev Bhaskaran

Inventor： Vasudev Bhaskaran

IPC: G06F17/30

CPC classification number: H04L65/4092 ,  H04L29/06027 ,  H04L43/0817 ,  H04L43/0894 ,  H04L65/604 ,  H04L65/80 ,  H04L67/36

Abstract: Automatic defocusing of displayed multimedia information (e.g., video) on a client in a client-server system by monitoring dynamic display properties of the client provides more efficient use of resources in the system. In one embodiment, bandwidth is conserved by configuring the server with the capability of defocus select data being sent to the client based on the client's dynamic display properties. The defocused data can be sent at a lower bit-rate. In another embodiment, the client's decoder is configured to receive and process the monitoring information and make adjustments on the client side. In this situation, only viewable data is decoded accurately; other, obstructed data can be decoded at a lower accuracy.

Abstract translation: 通过监视客户机 - 服务器系统中的客户端 - 服务器系统的客户端上显示的多媒体信息（例如，视频）的自动散焦，通过监视客户端的动态显示属性来提供更有效地利用系统中的资源。 在一个实施例中，通过根据客户端的动态显示属性配置具有散焦选择数据被发送给客户端的能力的服务器来节省带宽。 散焦数据可以以较低的比特率发送。 在另一个实施例中，客户机的解码器被配置为接收和处理监视信息并在客户端进行调整。 在这种情况下，只有可视数据被精确解码; 其他阻塞数据可以以较低的精度进行解码。

公开(公告)号：US6064764A

公开(公告)日：2000-05-16

申请号：US52041

申请日：1998-03-30

Applicant: Vasudev Bhaskaran ,  Viresh Ratnakar

Inventor： Vasudev Bhaskaran ,  Viresh Ratnakar

IPC: H04N7/26 ,  G06T1/00 ,  H04N1/32 ,  H04N1/387 ,  G06K9/00

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

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5793985A

公开(公告)日：1998-08-11

申请号：US663428

申请日：1996-06-17

Applicant: Balas K. Natarajan ,  Vasudev Bhaskaran

Inventor： Balas K. Natarajan ,  Vasudev Bhaskaran

IPC: H04N7/26 ,  H04N1/00 ,  H04N1/41

CPC classification number: H04N19/51

Abstract: This disclosure provides a method of block-based motion estimation used in video compression. The compression process, derives change data for a new frame of data (with respect to a reference frame) by first dividing the frame structure into data tiles (or data blocks) of identical size. Each tile in the new frame is compared to a localized window (about the tile's expected position) in the reference frame to search for a best fit, and thereby provide motion data for the particular tile. Once the best fit is determined, motion-compensated difference data is determined, and stored with the motion data for each tile to complete the process. To achieve computation efficiency, each tile under analysis is preferably converted to single-bit value data and searching and comparisons are performed based on such transformed single-bit data. The single-bit data is computed by convolving the original image data with a low-pass filter to obtain a threshold matrix. The original image data is then compared with the threshold matrix, and converted to single-bit values in dependence on whether the values of the data exceed counterparts in the threshold matrix. Comparison is performed using an exclusive-or function and bit-summation of results.

Abstract translation: 本公开提供了一种用于视频压缩的基于块的运动估计的方法。 压缩过程通过首先将帧结构划分成具有相同大小的数据块（或数据块​​）来导出新的数据帧（相对于参考帧）的改变数据。 将新帧中的每个瓦片与参考帧中的本地化窗口（关于瓦片的预期位置）进行比较，以搜索最佳拟合，从而提供特定瓦片的运动数据。 一旦确定了最佳拟合，则确定运动补偿差分数据，并与每个瓦片的运动数据一起存储以完成该过程。 为了实现计算效率，分析中的每个瓦片优选地被转换为单比特值数据，并且基于这种变换的单比特数据执行搜索和比较。 通过使用低通滤波器卷积原始图像数据来计算单位数据，以获得阈值矩阵。 然后将原始图像数据与阈值矩阵进行比较，并且根据数据的值是否超过阈值矩阵中的对应部分，将其转换为单位值。 使用结果的排他或功能和位求和进行比较。

公开(公告)号：US5467131A

公开(公告)日：1995-11-14

申请号：US175445

申请日：1993-12-30

Applicant: Vasudev Bhaskaran ,  Ruby B. Lee

Inventor： Vasudev Bhaskaran ,  Ruby B. Lee

IPC: G06F17/14 ,  G06T9/00 ,  H03M7/30 ,  H03M7/40 ,  H04N1/41 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32

CPC classification number: G06F17/147 ,  H04N19/436 ,  H04N19/13 ,  H04N19/60 ,  H04N19/91

Abstract: An inverse discrete cosine transform ("IDCT") implementation specifically for the decompression of JPEG, MPEG and Px64 encoded image and video data uses a preprocessing step embedded in a Huffman decoding process to classify data blocks prior to computing the IDCT. The use of data block classification, along with the use of pruned IDCTs appropriate for the specific block class, reduces the total number of multiply and addition operations necessary to decompress an encoded data block, and thereby allows faster data decompression. Synthesis of coefficients suitable for multiplication allows efficient implementation of the novel decompression technique in typical microprocessor architectures, including RISC processor architectures.

Abstract translation: 专门用于JPEG，MPEG和Px64编码图像和视频数据的解压缩的逆离散余弦变换（“IDCT”）实现使用嵌入在霍夫曼解码过程中的预处理步骤来在计算IDCT之前对数据块进行分类。 数据块分类的使用以及适用于特定块类的修剪的IDCT的使用减少了解压缩编码数据块所需的乘法和加法运算的总数，从而允许更快的数据解压缩。 适合乘法的系数的合成允许在典型的微处理器架构（包括RISC处理器架构）中有效地实现新的解压缩技术。

公开(公告)号：US09286658B2

公开(公告)日：2016-03-15

申请号：US13427167

申请日：2012-03-22

Applicant: Vasudev Bhaskaran

Inventor： Vasudev Bhaskaran

IPC: G06T5/00

CPC classification number: G06T5/002 ,  G06T2207/10028 ,  G06T2207/20012

Abstract: Techniques described in the disclosure are generally related to enhancing portions of an image relative to other portions of the image. The example techniques may utilize depth information in conjunction with one or more viewer perceivable information to enhance portions of the image relative to other portions. The techniques may then display the enhanced image to provide the viewer with a possibly more realistic image.

Abstract translation: 本公开中描述的技术通常涉及相对于图像的其他部分增强图像的部分。 示例技术可以结合一个或多个观看者可感知信息利用深度信息，以增强图像相对于其他部分的部分。 然后，技术可以显示增强图像以向观看者提供可能更逼真的图像。