841results about How to "Remove distortion" patented technology

A vehicle vision system includes a vehicle having first and second spatially separated image capture sensors. The first image capture device has a first field of view having a first field of view portion at least partially overlapping a field of view portion of a second field of view of the second image capture device. A control receives a first image input from the first image capture sensor and a second image input from the second image capture sensor and generates a composite image synthesized from the first image input and the second image input. A display system displays the composite image.

An image sensing system for a vehicle includes an imaging sensor comprising a two-dimensional array of light sensing photosensor elements. The system includes a logic and control circuit comprising an image processor for processing image data derived from the imaging sensor. The logic and control circuit generates at least one control output for controlling at least one accessory of the vehicle. The imaging sensor is disposed at an interior portion of the cabin of the vehicle and preferably has a field of view exterior of the vehicle through a window of the vehicle.

A device for imaging a relief object without illuminating a platen is disclosed. The device includes a single electrode electroluminescent device, which may be inorganic or organic, and a current source. The current source is coupled to the single electrode of the electroluminescent device and to the relief object to be imaged. The valleys and ridges of the relief object couple current to the electroluminescent device at different magnitudes which causes the electroluminescent device to generate light at different intensities that correspond to the ridges and valleys of the relief object. The generated light forms an image of the relief object which may be focused by optical elements onto a sensor array for capture and image processing. In another embodiment of the invention, a one-to-one sensor array is located proximate the electroluminescent device to capture the image. In an embodiment of the invention which insulates the relief object from current, the electroluminescent device is covered with a variable resistance layer and the variable resistance layer is covered with a flexible electrode. One lead from the current source is coupled to the flexible electrode and another lead is coupled to the single electrode. When a relief object is brought in contact with the flexible electrode, a localized pressures generated by the ridges of the relief object form conductive paths through the variable resistance layer which are lower in electrical resistance than those formed by pressure in the areas adjacent the valleys of the relief object. The different magnitudes of current delivered through the conductive paths to the electroluminescent device cause the electroluminescent device to generate an image of the relief object without exposing the relief object to electrical current.

In an image processing apparatus of the present invention, which displays image data, such as images photographed by imaging apparatus such as a digital camera and photographing conditions as images before correction and images after correction, on an image display section, distortion and color tone of images obtained from an unused camera are corrected and joined to each other as viewing images before and after correction, so that the parameters used in the correction are stored in accordance with its apparatus, and the stored parameters are read out and used to correct in images obtained from previously used camera, and the joined image and image data are displayed on a monitor and output by a printer, or stored in a recording medium.

A method of generating a real time control signal for use in an electric arc welding process having welding voltage and welding current, said method comprising: measuring the welding voltage and welding current at a first time, momentarily changing either the welding voltage or welding current by less than about 10%, then measuring the welding voltage and the welding current after the change at a second time, determining the welding voltage difference between the first time and the second time, determining the welding current difference between the first time and the second time, producing a derivative value representing the desired control signal by dividing the welding voltage difference between the first and second times by the welding current difference between the first and second times and generating the control signal by the derivative value.

The invention discloses a circulating-current restraining method for a three-phase modular multilevel convertor. The method comprises the following steps of: processing detected bridge current by utilizing fundamental frequency-doubled rotating coordinates transform based on negative sequences, and then performing signal processing and feedforward compensation link so as to acquire an additional control signal used for restraining circulating current; subtracting the additional control signal from a half of a DC voltage value, superposing an output voltage reference signal on the AC side of the existing converter to acquire a bridge voltage reference signal, and performing pulse width modulation to acquire trigger pulses of various bridges of the converter to ensure that the converter outputs corresponding voltage. The circulating-current restraining method can restrain the circulating current in the converter in a low level under the condition of not increasing the inductance of the bridges so as to basically eliminate the distortion of the bridge current to make the bridge current restored into sinusoidal waveform.

Processing a received optical signal in an optical communication network includes equalizing a received optical signal to provide an equalized signal, demodulating the equalized signal according to an m-ary modulation format to provide a demodulated signal, decoding the demodulated signal according to an inner code to provide an inner-decoded signal, and decoding the inner-decoded signal according to an outer code. Other aspects include other features such as equalizing an optical channel including storing channel characteristics for the optical channel associated with a client, loading the stored channel characteristics during a waiting period between bursts on the channel, and equalizing a received burst from the client using the loaded channel characteristics.

Mosaic-shaped block noise occurs when a compressed video signal is reproduced. This block noise is removed, but removing block noise from every block using a deblocking filter imposes a significant load on the deblocking filter. This load is therefore reduced by determining whether coding distortion removal (deblocking) is necessary, and applying a deblocking filter only when needed.

A technique for controlling a loudspeaker system with an artificial neural network includes filtering, with a deconvolution filter, a measured system response of a loudspeaker and a reverberant environment in which the loudspeaker is disposed to generate a filtered response, wherein the measured system response corresponds to an audio input signal applied to the loudspeaker while the loudspeaker is disposed in the reverberant environment. The techniques further include generating, via a neural network model, an initial neural network output based on the audio input signal, comparing the initial neural network output to the filtered response to determine an error value, and generating, via the neural network model, an updated neural network output based on the audio input signal and the error value.

The present invention discloses a visual code system wherein camera-equipped mobile phones (or similar devices, such as wireless PDAs) are used to identify and decode images that contain one or more “visual codes.” By recognizing a code tag, the device can determine a bit pattern or an integer number encoded in the tag (the code value), the targeted object or image element, as well as additional parameters, such as the viewing angle of the camera. Code recognition is performed on the mobile device itself. When the mobile device is equipped with a wireless communication channel, it can be used to retrieve online content or to access information on the Internet based on the sensed code and its parameters. The retrieved content can then be presented on the mobile device.

A system for transmitting information in a well comprises a tubular string disposed in the well and having a drilling fluid flowing therethrough. A pulser is disposed in the tubular string and transmits a pulse synchronization marker comprising a chirp signal. A surface controller, acting under programmed instructions, detects the chirp signal adjusts a signal decoding technique based on the detected chirp signal.

An improved rocker-type switch has a toggle member pivotably mounted on a central pivot member in a frame of a top housing part joined to a bottom housing part holding switch contacts in a modular block subassembly. A pair of movable contact arms is actuated by spring-biased actuator members held in the central pivot member. The modular block subassembly has an insulative top block member, a top switch contact plate with switch contacts on upright tabs inserted through slots in the top block member, an insulative bottom block member sandwiching the top switch contact plate, and a bottom switch contact plate having switch contacts on upright tabs inserted through slots in the bottom and top block members, forming a pair of opposing switch contact positions for the movable contact arms. The switch contact plates have clip portions for inserting the tabs of respective switch contact terminal plates therein. For different switch configurations, e.g., single-pole, double-pole, 3-way, or 4-way operation, the switch contact plates are changed, but the same block subassembly and other parts can be used, thereby minimizing change of the surrounding parts, limiting insulative molding costs, eliminating tolerance stack-up, and facilitating assembly through automation.

A mirror is provided with throughholes, or channels, formed through its main body and a coolant pipe of a heat-conductive material is inserted in each of the channels for passing a cooling fluid inside. The outer wall of the coolant pipe does not contact the inner wall of the channel, and there is left a gap in between. The gap contains a heat-conducting gas such as helium. The gap is of a width of less than 100 μm such that the gas has a high heat transfer coefficient even if its pressure is not too high. In some applications the gap may be filled with a heat-conductive fluid. It may be preferable, depending upon the circumstances, to form these channels proximally to the surface on which radiation is made incident. Additionally, the surface of the side of the mirror opposite the reflective side may be heated by auxiliary heat sources.

Systems and methods for capturing and digitizing an image of a wound and/or a wound trace from a patient and determining there from a degree of change in the characteristics of the wound. A first embodiment includes a transparent/translucent film onto which a dark outline of the wound is traced. The film is fixed to a reference template that provides a geometrically defined reference area. The film/template assembly is imaged with a digital imaging device associated with a handheld digital processor (such as a PDA). The digital image of the template and the wound trace are analyzed to identify the wound tracing and quantify the area within the closed curve. A second embodiment includes imaging the wound site with a reference tag and viewing the image on a display with an associated graphical data input device. A trace of the wound perimeter is made on display with the graphical data input device to establish a data set for the wound perimeter. The data set for the wound trace and the reference tag are analyzed to identify and quantify the wound area. In each embodiment, the system includes a display for providing both a view of the wound trace and the calculated data associated with the wound area.

A buck-boost converter of an H bridge type having a function for initially charging a smoothing output capacitor without a relay and a rush current preventing resistance. A compact and flat power supply is attained by employing a current critical mode H bridge system for a PFC converter and providing a function of initially charging a smoothing output capacitor to a converter circuit.