Patent application number | Description | Published |
20100318477 | FAST AND EFFICIENT NONLINEAR CLASSIFIER GENERATED FROM A TRAINED LINEAR CLASSIFIER - A classifier method comprises: projecting a set of training vectors in a vector space to a comparison space defined by a set of reference vectors using a comparison function to generate a corresponding set of projected training vectors in the comparison space; training a linear classifier on the set of projected training vectors to generate a trained linear classifier operative in the comparison space; and transforming the trained linear classifier operative in the comparison space into a trained nonlinear classifier that is operative in the vector space to classify an input vector. | 12-16-2010 |
20110040711 | TRAINING A CLASSIFIER BY DIMENSION-WISE EMBEDDING OF TRAINING DATA - A classifier training method and apparatus for training, a linear classifier trained by the method, and its use, are disclosed. In training the linear classifier, signatures for a set of training samples, such as images, in the form of multi-dimension vectors in a first multi-dimensional space, are converted to a second multi-dimension space, of the same or higher dimensionality than the first multi-dimension space, by applying a set of embedding functions, one for each dimension of the vector space. A linear classifier is trained in the second multi-dimension space. The linear classifier can approximate the accuracy of a non-linear classifier in the original space when predicting labels for new samples, but with lower computation cost in the learning phase. | 02-17-2011 |
20120045134 | LARGE SCALE IMAGE CLASSIFICATION - An input image representation is generated based on an aggregation of local descriptors extracted from an input image, and is adjusted by performing a power normalization, an Lp normalization such as an L2 normalization, or both. In some embodiments the generating comprises modeling the extracted local descriptors using a probabilistic model to generate the input image representation comprising probabilistic model component values for a set of probabilistic model components. In some such embodiments the probabilistic model comprises a Gaussian mixture model and the probabilistic model components comprise Gaussian components of the Gaussian mixture model. The generating may include partitioning the input image into a plurality of image partitions using a spatial pyramids partitioning model, extracting local descriptors, such as Fisher vectors, from the image partitions, and concatenating the local descriptors extracted from the image partitions. | 02-23-2012 |
20120076401 | IMAGE CLASSIFICATION EMPLOYING IMAGE VECTORS COMPRESSED USING VECTOR QUANTIZATION - Local descriptors are extracted from an image. An image vector is generated having vector elements indicative of parameters of mixture model components of a mixture model representing the extracted local descriptors. The image vector is compressed using a vector quantization algorithm to generate a compressed image vector. Optionally, the compressing comprises splitting the image vector into a plurality of sub-vectors each including at least two vector elements, compressing each sub-vector independently using the vector quantization algorithm, and concatenating the compressed sub-vectors to generate the compressed image vector. Optionally, each sub-vector includes only vector elements indicative of parameters of a single mixture model component, and any sparse sub-vector whose vector elements are indicative of parameters of a mixture model component that does not represent any of the extracted local descriptors is not compressed. | 03-29-2012 |
Patent application number | Description | Published |
20080315792 | METHOD AND CIRCUIT FOR CORRECTING A DIFFERENCE IN LIGHT OUTPUT AT OPPOSITE ENDS OF A FLUORESCENT LAMP ARRAY - A method and electrical circuit corrects a difference in light output at opposite ends of a fluorescent lamp array. An electrical circuit for correcting a difference in light output at the ends of a fluorescent lamp array includes a microcontroller and firmware for generating a first pulse-width modulated inverter switch control signal having a first duty cycle that may be varied by computer program instructions executed by the microcontroller. An inverter bridge driver is coupled to the microcontroller for generating a switching signal for a first inverter bridge from the first pulse-width modulated inverter switch control signal to generate a first inverter voltage having a magnitude determined by the first duty cycle. | 12-25-2008 |
20080315793 | METHOD AND FIRMWARE FOR CONTROLLING VOLTAGE AND CURRENT IN A FLUORESCENT LAMP ARRAY - A method and firmware for controlling voltage and current in an electrical load includes steps of calculating a numerically quantized duty cycle of a pulse-width modulated, digital switch control signal by firmware in an inverter voltage microcontroller as a function of an inverter voltage and controlling the inverter voltage by adjusting the duty cycle of the digital switch control signal to generate a load current in the electrical load. | 12-25-2008 |
20080315794 | METHOD AND FIRMWARE FOR GENERTING A DIGITAL DIMMING WAVEFORM FOR AN INVERTER - A method and firmware for method of generating a digital dimming waveform for an inverter includes steps of receiving programmable parameters as input to firmware in an inverter voltage microcontroller including a soft start duration, a restrike voltage, a restrike duration, a recovery duration, a sustaining voltage, a dimming duty cycle, and an inverter frequency; and generating by firmware in the inverter voltage microcontroller a first portion of a pulse-width modulated digital switch control signal having a frequency equal to the inverter frequency and a duty cycle that varies from a first value to a second value during a time interval equal to the soft start duration. | 12-25-2008 |
20080315797 | METHOD AND FIRMWARE FOR CONTROLLING AN INVERTER VOLTAGE BY DRIVE SIGNAL FREQUENCY - A method and firmware for controlling an inverter voltage includes steps of receiving as input a digitized feedback signal representative of an inverter voltage that varies with frequency according to a transfer function, calculating a frequency of a digital switch control signal in firmware in an inverter voltage microcontroller by the transfer function from the digitized feedback signal to adjust the inverter voltage to a set point value, and generating the digital switch control signal having the calculated frequency by firmware in the inverter voltage microcontroller as output to generate the inverter voltage at the set point value. | 12-25-2008 |