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| Number | Title | Issue Date |
| 7440586 | Object classification using image segmentation A method represents a class of objects by first acquiring a set of positive training images of the class of objects. A matrix A is constructed from the set of positive training images. Each row in the matrix A corresponds to a vector of intensities of pixels of one ... | 10/21/2008 |
| 7426301 | Usual event detection in a video using object and frame features The invention provides a method for detecting usual events in a video. The events are detected by first constructing an aggregate affinity matrix from features of associated items extracted from the video. The affinity matrix is decomposed into eigenvectors, and the... | 09/16/2008 |
| 7426292 | Method for determining optimal viewpoints for 3D face modeling and face recognition A method determines an optimal set of viewpoints to acquire a 3D shape of a face. A view-sphere is tessellated with a plurality of viewpoint cells. The face is at an approximate center of the view-sphere. Selected viewpoint cells are discarded. The remaining viewpoi... | 09/16/2008 |
| 7423576 | System and method for radar tracking using communications packets According to the invention, IEEE 802.15.4a packets are used for communications, ranging and passive radar (detecting changes/motions, tracking objects in the environment) functionality. Changes and motions in the environment are detected by exploiting the specific p... | 09/09/2008 |
| 7421111 | Light pen system for pixel-based displays An interactive display system includes a pixel-based display surface and a light pen. A sequence of patterns is projected onto the display surface. The sequence of patterns has a unique sequence of light intensities for each location of the display surface. Intensit... | 09/02/2008 |
| 7420590 | Video matting using camera arrays A method and system for determining an alpha matte for a video is presented. A set of videos is acquired by an array of cameras. A centrally located camera in the array is designated as a reference camera and acquires a reference video. A foreground depth plane is s... | 09/02/2008 |
| 7415385 | System and method for measuring performances of surveillance systems A computer implemented method measures a performance of surveillance system. A site model, a sensor model and a traffic model are selected respectively from a set of site models, a set of sensor models, and a set of traffic models to form a surveillance model. Based... | 08/19/2008 |
| 7414977 | Power and delay sensitive ad-hoc communication networks An ad-hoc wireless communication network includes multiple nodes. Each node maintains a routing table. The routing table is constructed by broadcasting route request packets from a source node. The request packet includes an address of a destination node. Intermedia... | 08/19/2008 |
| 7415392 | System for separating multiple sound sources from monophonic input with non-negative matrix factor deconvolution A method and system separates components in individual signals, such as time series data streams. A single sensor acquires concurrently multiple individual signals. Each individual signal is generated by a different source. An input non-negative matrix representing ... | 08/19/2008 |
| 7415164 | Modeling scenes in videos using spectral similarity A computer implemented method models a scene in a video acquired by a camera. For each pixel in each frame of the video, a time series of intensities of the pixel is acquired. A harmonic series is extracted from samples of each time series using a sliding window. Di... | 08/19/2008 |
| 7409830 | Fuel-cell actuated mechanical device A method generates mechanical energy by storing water in a fuel-cell and a pressure equalization device. The water stored in the fuel-cell is electrolyzed into hydrogen gas and oxygen gas, which displaces the water stored in the pressure equalization device. The dis... | 08/12/2008 |
| 7412098 | Method for generating a low-dimensional representation of high-dimensional data A method represents a class of objects. A set of samples for the objects in the class is acquired, there being one sample for each object, and each sample includes a plurality of data values representing characteristics of the object. The samples are grouped into su... | 08/12/2008 |
| 7412109 | System and method for filtering artifacts in images A method filters pixels in an image, by first partitioning the image into blocks. Edge block are identified. A variance of an intensity for each pixel in each edge block is determined. Then, each pixel in each edge block is filtered with a filter that is dependant o... | 08/12/2008 |
| 7408591 | System and method for defocus difference matting A method extracts an alpha matte from a video acquired of a scene. A set of pinhole or narrow aperture images IP is acquired of the scene with a camera aperture set to a relatively large depth-of-field. The scene includes a background B and a foreground F... | 08/05/2008 |
| 7409550 | Method for binding networked devices A method binds devices connected by a wireless network by setting a first timeout in a master device. A key exchange is performed between the master and a slave device. The key exchange is terminated if the first timeout expires and the key exchange is incomplete. T... | 08/05/2008 |
| 7409022 | Synchronizing clocks in wireless personal area networks A method synchronizes a transmit clock of a transmitter with a receive clock of a receiver in a wireless communications network. Times t1, t2, t3, and t4 of the transmit clock corresponding times t1′, t2′, t3′, ... | 08/05/2008 |
| 7409407 | Multimedia event detection and summarization A method detects events in multimedia. Features are extracted from the multimedia. The features are sampled using a sliding window to obtain samples. A context model is constructed for each sample. An affinity matrix is determined from the models and a commutative d... | 08/05/2008 |
| 7406409 | System and method for recording and reproducing multimedia based on an audio signal A system and method summarizes multimedia stored in a compressed multimedia file partitioned into a sequence of segments, where the content of the multimedia is, for example, video signals, audio signals, text, and binary data. An associated metadata file includes i... | 07/29/2008 |
| 7406123 | Visual complexity measure for playing videos adaptively A method plays frames of a video adaptively according to a visual complexity of the video. First a spatial frequency of pixel within frames of the video is measured, as well as a temporal velocity of corresponding pixels between frames of the video. The spatial freq... | 07/29/2008 |
| 7403746 | Adaptive frame durations for time-hopped impulse radio systems A method determines a duration of a frame in an impulse radio system for radio ranging. Channel state information of a channel between two transceivers is estimated periodically. A signal to noise and interference ratio is also estimated periodically. The frame dura... | 07/22/2008 |
| 7403664 | Traffic event detection in compressed videos A method detects traffic events in a compressed video. Feature vectors are extracted from the compressed video. The feature vector are provided to a Gaussian mixture hidden Markov model. Then, a maximum likelihood of the Gaussian mixture hidden Markov model is deter... | 07/22/2008 |
| 7403157 | Radio ranging using sequential time-difference-of-arrival estimation A method determines a position of a target object. A window function is applied repeatedly to a first signal and a second signal of a pair of radio signals received at a pair of passive sensors from a target object while time shifting the window function during a co... | 07/22/2008 |
| 7403707 | Method for estimating camera settings adaptively A camera is configured to adaptively determine camera settings. The camera includes a plurality of sensors elements configured to acquire a current image of a scene according to a current set of camera settings. A number of sensor elements having a set of desirable ... | 07/22/2008 |
| 7401217 | Secure routing protocol for an ad hoc network using one-way/one-time hash functions A method authenticates packets that are transmitted serially in a network. A current password is selected for a current packet to be transmitted. The current packet includes current data. A one-way/one-time hash function is applied to the current password to form a ... | 07/15/2008 |
| 7394855 | Error concealing decoding method of intra-frames of compressed videos A method conceals errors in an infra-frame of compressed video. The intra-frame is decoded to multiple macroblocks. Each macroblock including pixels arranged in a rectangular array. A lost macroblock is identified during the decoding. Pixels along an outer boundary ... | 07/01/2008 |
| 7391802 | Modulating signals for coherent and differentially coherent receivers A system incorporates time-hopped impulse radio (TH-IR) and transmitted-reference impulse radio (TR-IR) transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by generating a reference waveform and ... | 06/24/2008 |
| 7391905 | Method for secure component labeling in images A method processes an input image securely. An input image is acquired in a client and partitioned into a set of overlapping tiles. The set of overlapping tiles is transferred to a server. In the server, motion pixels in each tile that are immediately adjacent to ot... | 06/24/2008 |
| 7388841 | Selecting multiple paths in overlay networks for streaming data A method selects multiple paths between a server and a client in an overlay network where nodes are connected by links. The nodes include the server and the client. Each path includes a set of selected links. First, in each node, Quality of service metrics are measu... | 06/17/2008 |
| 7388833 | Access control and protocol for packet switched wireless communications networks A method transmits packets over a single channel in a wireless communication network that includes multiple nodes. Access to the channel is gained in a transmitting node. Then, a block of packets is transmitted to a receiving node via the channel. The transmitting n... | 06/17/2008 |
| 7383504 | Method for representing and comparing multimedia content according to rank A method for generating a representation of multimedia content by first segmenting the multimedia content spatially and temporally to extract objects. Feature extraction is applied to the objects to produce semantic and syntactic attributes, relations, and a contain... | 06/03/2008 |
| 7382840 | RF signal processing in multi-antenna systems A method for antenna subset selection by joint processing in RF and baseband in a multi-antenna systems. Lt input data streams are generated in a transmitter for either diversity transmission or multiplexing transmission. These streams are modulated to RF... | 06/03/2008 |
| 7376901 | Controlled interactive display of content using networked computer devices The invention provides a novel method for interacting with content objects stored in computer devices connected as nodes of a communications network, each node including an input interface and an output interface, the output interface including a display area. A fir... | 05/20/2008 |
| 7376246 | Subspace projection based non-rigid object tracking with particle filters A method tracks non-rigid objects in a video acquired of a cluttered scene by a camera. The method uses a particle filter. The tracking includes the following steps: motion transition estimation, contour deformation detection, and contour regulation. The method uses... | 05/20/2008 |
| 7375731 | Video mining using unsupervised clustering of video content A method mines unknown content of a video by first selecting one or more low-level features of the video. For each selected feature, or combination of features, time series data is generated. The time series data is then self-correlated to identify similar segments ... | 05/20/2008 |
| 7376173 | Unambiguously encoding and decoding signals for wireless channels A method encodes a sequence of blocks of input bits to be transmitted over a wireless channel. Each block of input bits is converted to a codeword, and each codeword is mapped to multiple sub-blocks of complex numbers. Each sub-block is multiplied by a disambiguatin... | 05/20/2008 |
| 7372393 | Method and system for determining unwrapped phases from noisy two-dimensional wrapped-phase images A method converts an input image of noisy wrapped phases to an output image of absolute unwrapped phases. The noisy wrapped phases in the input image are represented as a set of re-wrapped phases and a set of phase shifts. The set of re-wrapped phases are partitione... | 05/13/2008 |
| 7373585 | Combined-replica group-shuffled iterative decoding for error-correcting codes A method generates a combined-replica group-shuffled iterative decoder. First, an error-correcting code and an iterative decoder for an error-correcting code is received. Multiple group-shuffled sub-decoders for the error-correcting code are constructed, based on th... | 05/13/2008 |
| 7373012 | Detecting moving objects in videos with corner-based background model A computer implemented method models a background in a sequence of frames of a video. For each frame, the method detects static corners using an array of pixels of the frame, and extracts, for each static corner, features from a window of pixels around the static co... | 05/13/2008 |
| 7372975 | Method for secure background modeling in images A method processes a sequence of input images securely. A sequence of input images are acquired in a client. Pixels in each input image are permuted randomly according to a permutation π to generate a permuted image for each input image. Each permuted image is tran... | 05/13/2008 |
| 7372770 | Ultrasonic Doppler sensor for speech-based user interface A method and system detect speech activity. An ultrasonic signal is directed at a face of a speaker over time. A Doppler signal of the ultrasonic signal is acquired after reflection by the face. Energy in the Doppler signal is measured over time. The energy over tim... | 05/13/2008 |
