188 results about "Variable resolution" patented technology

The invention facilitates browsing of an indexed collection of electronic content by displaying information identifying a current location within the collection of electronic content using a non-visual display (e.g., audio display and/or haptic display). The information identifying the current location can be displayed with variable resolution and the content of the display of the information identifying the current location can be dependent on the resolution. The invention can be used to browse any type of electronic content, including, for example, audio content, visual content, text content or some combination of such content. The invention can be used to browse electronic content that is indexed in any way, such as, for example, electronic content that is indexed (partly or entirely) alphabetically, numerically or by date.

An optical code reading system having an auto-exposure system for use with a variable resolution imaging sensor in which very low resolution images are used to determine exposure parameters is presented. The very low resolution images can be transferred much faster than high resolution images which results in a very fast auto-exposure system. The optical code reading system further includes an optical zoom system for zooming in and out of a target without the use of any moveable components. The optical zoom system makes use of a binning and/or subsampling feature of the imaging sensor for zooming in and out of the target. High-speed decoding methodologies are also presented for the optical code reading system. One decoding methodology utilizes low resolution images for performing high-speed decoding. Other methodologies utilize low resolution images and higher resolution images, if the optical code imaged by the low resolution images is not decoded successfully.

A method for capturing a digital panoramic image includes projecting a panorama onto an image sensor by means of a panoramic objective lens. The panoramic objective lens has a distribution function of the image points that is not linear relative to the field angle of the object points of the panorama, such that at least one zone of the image obtained is expanded while at least another zone of the image is compressed. When a panoramic image obtained is then displayed, correcting the non-linearity of the initial image is required and is performed by means of a reciprocal function of the non-linear distribution function of the objective lens or by means of the non-linear distribution function.

This disclosure provides a method and system for automatically recognizing facial expressions at variable resolutions of video. According to one exemplary method, facial expressions are detected, extracted and classified from a video sequence based on an automatic localization of the periocular region associated with a detected and extracted face.

The present general inventive concept relates to methods and systems to select and display information on an avionics display screen. The systems and methods allow for the selection and display of information using knobs to highlight and select the desired information for display, eliminating the need for a cursor function. The systems and methods also provide for multiple pages and/or multiple windows or “tiles” within these pages and/or windows simultaneously on a single screen of a display, with each window, page, and/or tile being fully controlled independently when selected. The present general inventive concept also relates to systems and methods to provide multiple cues on an electronic display system altitude tape to a pilot in advance and impending approach to a predefined altitude. The present general inventive concept also relates to systems and methods to employ variable resolution topographical data based on display range for an avionics navigation display.

A position-tracking system for tracking the position of an object is disclosed. According to various embodiments, the tracking system includes a tracking device that is connected to or otherwise affixed to the object to be tracked. The tracking device may include, among other things, an inertial sensor assembly, radio transceivers and a processor. The position tracking system may also include a host processing system that is in communication with the tracking device. The position tracking system may provide variable-resolution position information based on the environment in which the object is moving. In a “wide resolution” area, the system may compute a general position for the object based on a wireless telephone network Cell-ID/map correlation architecture. In a high-resolution area, greater position resolution may be realized from the combination of a wireless aiding system and inputs from the inertial sensors. In the high-resolution mode, the system may exploit distinct patterns of motion that can be identified as motion “signatures” that are characteristic of certain types of motion. Kinematic (or object movement) models may be constructed based on these motion signatures and the position tracking system may estimate the state of the object based on the kinematic model for the current mode of the object. Adaptive and cascaded Kalman filtering may be employed in the analysis to more accurately estimate the position and velocity of the object based on the motion pattern identified.

The invention relates to compression coding and/or decoding of digital signals, in particular by vector variable-rate quantisation defining a variable resolution. For this purpose an impulsion dictionary comprises: for a given dimension, increasing resolution dictionaries imbricated into each other and, for a given dimension, a union of: a totality (D′i<N>) of code-vectors produced, by inserting elements taken in a final set (A) into smaller dimension code-vectors according to a final set of predetermined insertion rules (F1) and a second totality of code-vectors (Y′) which are not obtainable by insertion into the smaller dimension code vectors according to said set of the insertion rules.

Analog computational arrays for matrix-vector multiplication offer very large integration density and throughput as, for instance, needed for real-time signal processing in video. Despite the success of adaptive algorithms and architectures in reducing the effect of analog component mismatch and noise on system performance, the precision and repeatability of analog VLSI computation under process and environmental variations is inadequate for some applications. Digital implementation offers absolute precision limited only by wordlength, but at the cost of significantly larger silicon area and power dissipation compared with dedicated, fine-grain parallel analog implementation. The present invention comprises a hybrid analog and digital technology for fast and accurate computing of a product of a long vector (thousands of dimensions) with a large matrix (thousands of rows and columns). At the core of the externally digital architecture is a high-density, low-power analog array performing binary-binary partial matrix-vector multiplication. Digital multiplication of variable resolution is obtained with bit-serial inputs and bit-parallel storage of matrix elements, by combining quantized outputs from one or more rows of cells over time. Full digital resolution is maintained even with low-resolution analog-to-digital conversion, owing to random statistics in the analog summation of binary products. A random modulation scheme produces near-Bernoulli statistics even for highly correlated inputs. The approach has been validated by electronic prototypes achieving computational efficiency (number of computations per unit time using unit power) and integration density (number of computations per unit time on a unit chip area) each a factor of 100 to 10,000 higher than that of existing signal processors making the invention highly suitable for inexpensive micropower implementations of high-data-rate real-time signal processors.

The invention relates to a voice quality evaluation method which includes the steps of conducting human ear auditory sense modeling processing on voice signals to obtain first signals, conducting resolution-ratio-variable time-frequency analysis on the first signals to obtain second signals, and conducting feature extraction and analysis based on the second signals to obtain voice quality evaluation results for the voice signals. According to the technical scheme, the problem that the accuracy of the voice quality evaluation is not high is solved; human ear auditory sense modeling processing is carried out, the signals to be detected are converted into time-frequency signals capable of showing the variable resolution ratio, the time-frequency signals with the variable resolution ratio are further analyzed, features corresponding to the signals are extracted, further analysis is carried out, and therefore the high-accuracy voice quality evaluation results are finally obtained.

A position-tracking system for tracking the position of an object is disclosed. According to various embodiments, the tracking system includes a tracking device that is connected to or otherwise affixed to the object to be tracked. The tracking device may include, among other things, an inertial sensor assembly, radio transceivers and a processor. The position tracking system may also include a host processing system that is in communication with the tracking device. The position tracking system may provide variable-resolution position information based on the environment in which the object is moving. In a “wide resolution” area, the system may compute a general position for the object based on a wireless telephone network Cell-ID/map correlation architecture. In a high-resolution area, greater position resolution may be realized from the combination of a wireless aiding system and inputs from the inertial sensors. In the high-resolution mode, the system may exploit distinct patterns of motion that can be identified as motion “signatures” that are characteristic of certain types of motion. Kinematic (or object movement) models may be constructed based on these motion signatures and the position tracking system may estimate the state of the object based on the kinematic model for the current mode of the object. Adaptive and cascaded Kalman filtering may be employed in the analysis to more accurately estimate the position and velocity of the object based on the motion pattern identified.

A light modulation and exposure system comprising: a light source; a light sensitive media; a two-dimensional light modulator containing a plurality of rows of light valves; means of imaging light source onto light modulator and light modulator onto light sensitive material; means of generating relative motion between image of light modulator and light sensitive material; means of shifting into the first of rows the data to be imaged onto light sensitive material and means of editing data from the first row to subsequent rows of modulator at a rate keeping the image of individual data pattern substantially stationary relative to light sensitive material until data transferred to the selected final rows; this sequence continuing until all data to be imaged has passed through light modulator. The two-dimensional light modulator may be oriented at a rotation relative to the direction of motion of the light sensitive media in a manner conducive to achieving variable resolution levels and half-tone generation.

The invention relates to an eagle eye-imitated intelligent visual sensing node which comprises a wide-angled camera, two PTZ cameras, an embedded type processor and a PTZ controller, wherein the wide-angled camera and the two PTZ cameras are positioned on a hardware platform, the wide-angled camera is arranged in the middle and fixed in position, the two PTZ cameras are arranged at two sides, the wide-angled camera and the two PTZ cameras are connected with the embedded type processor by signal wires, an acquired image is processed by the embedded type processor, the embedded type processor is used for controlling the PTZ cameras by the PTZ controller, and the two PTZ cameras can be adjusted under the control of the embedded type processor. After the eagle eye-imitated intelligent visual sensing node and a work method of the eagle eye-imitated intelligent visual sensing node are adopted, a visual range can be expanded to reach about 180 degrees, a suspicious target can be conveniently detected and positioned in a glancing way within a large range in a manner of variable resolution, and the target can be elaborately analyzed and recognized with high resolution.

The invention discloses a sea-sky-line detection method based on high gradient key points, and the method is suitable for ocean ship object identification and positioning devices. The method is characterized in that: based on a high efficiency attention mechanism of visual information, obtaining a statistical set of high gradient key points of an image column through employing a recursion optimization algorithm and a variable resolution sampling technique, subjecting the statistical set to least squares straight line fitting, rejecting outliers which do no satisfy a distance threshold condition in the statistical set and obtaining a selected set of the high gradient key points, subjecting the selected set to least squares straight line fitting, determining a selected set of the high gradient key points which satisfies an adaptive quantity threshold and a linear correlation threshold simultaneously as sea-sky-line. A problem of effective, accurate and real-time detection of sea-sky-line in a complex sea surface environment is solved by the sea-sky-line detection method based on high gradient key points, and the method has the characteristics of strong anti-interference capability and high calculating efficiency.

The invention discloses a moving target detection method and an imaging method for a near space slow platform SAR (Synthetic Aperture Radar). In the detection method disclosed by the invention, the characteristics of low platform speed and smaller ground static clutter Doppler broadening of the near space slow platform SAR are utilized, and separation of a moving target from static clutter is realized by designing a Doppler filter in a Doppler domain, so that the problem of difficulty in separating dynamic and static clutters of the SAR in moving target imaging is solved. According to the imaging method disclosed by the invention, moving target echo is extracted after separation of dynamic and static clutters and moving target detection, one-order keystone conversion is combined with a variable-resolution Doppler frequency modulation estimation method, and range walk correction is completed under the condition that the speed of the moving target is unknown, so that the problem of difficulty in range walk correction of the moving target echo is solved. The methods have the advantages that rapid moving targes can be detected and imaged; and the methods are suitable for detecting and imaging slow moving targets.

The invention relates to a ghost imaging method and a ghost imaging system based on a bionic vision mechanism, and belongs to the photoelectric imaging field. A laser source, a collimating lens, a rotary frosted glass, and a spectroscope are respectively disposed on the same optical path sequentially. The laser source, the collimating lens, and the rotary frosted glass are used to generate parallel pseu-dothermal light required by the ghost imaging. The spectroscope is used to divide the pseu-dothermal light into two optical paths, and reflection light is a reference arm optical path, and transmission light is a detection arm optical path. The light intensity distribution of the reference arm optical path is received by a bionic detector array, and pseu-dothermal light source two-dimensional light intensity distribution information is completed. After the light of the detection arm is irradiated on a target, the light is reflected, and then the light is reflected by the spectroscope, and the reflection light total light intensity is received by a barrel detector, and the target reflection light total light intensity information acquisition is completed. A related arithmetic unit is used for the operation of the information acquired by the bionic detector array and the barrel detector. The bionic variable resolution detector array is adopted, and large visual field, high resolution imaging and fast imaging are realized at the same time.

The invention discloses a solar radio burst spectrum device based on a high speed AD acquisition card to analyze and study solar radio burst at different time and frequency resolutions. The system comprises a parabolic antenna, a low noise amplifier, the high-speed AD acquisition card, a computer, a high-speed solid state hard disk, c language processing software, FPGA internal threshold judgment software, Matlab processing software and labview processing software. The device amplifies a solar radio signal and sends the signal to the FPGA in AD conversion digital quantity. The sum of the power spectrum is acquired. When the sum is greater than a set threshold value, solar radio burst occurs, and the system intensively collects data. When the sum is less than the threshold value, solar radio burst does not occur, and the system sparsely collects data. The data are uploaded to a computer through a PCIe interface and are stored in the solid-state hard disk. At night, FFT operation of different length is carried out on the stored data to acquire a solar radio burst intensity graph at different time and frequency resolutions.