223 results about "Reference orientation" patented technology

Methods and systems for providing gesture-based power management for a wearable portable electronic device with display are described. An inertial sensor is calibrated to a reference orientation relative to gravity. Motion of the portable device is tracked with respect to the reference orientation, and the display is enabled when the device is within a viewable range, wherein the viewable range is a predefined rotational angle range in each of x, y, and z axis, to a user based upon a position of the device with respect to the reference orientation. Furthermore, the display is turned off if an object is detected within a predetermined distance of the display for a predetermined amount of time.

Systems are arranged to provide a user information which relates to objects of interest. A user may point a hand held device toward an object to address it. The device determines which objects are being addressed by making position and attitude measurements and further a reference and search of a database containing preprogrammed information relating to objects. Information relating to objects determined as objects presently being addressed is thereafter presented at a user interface. Devices of these systems include a point reference, a direction reference, a position determining support, attitude determining support, a computer processor and database, and a user interface. Methods of systems include the steps of addressing an object, determining position and attitude, searching a database, and presenting information to a user.

A pool cleaning robot adapted to move in a direction along the bottom surface of a pool. The robot comprises a compass, a rate gyroscope, and a controller adapted to determine the orientation of the robot, relative to a reference orientation thereof, based on readings of the compass and the gyroscope.

A CAS system and method for measuring surgical parameters during hip replacement surgery to guide an operator in inserting a hip joint implant in a femur, comprising a first trackable reference in fixed relation with the pelvis and a registration tool. A sensor apparatus tracks the first trackable reference and the registration tool. A controller unit is connected to the sensor apparatus so as to receive tracking data for the first trackable reference and the registration tool. The controller unit has a position and orientation calculator to calculate from the tracking data a position and orientation of the pelvic trackable reference to track the pelvic frame of reference, and of the registration tool to produce a femoral frame of reference at two sequential operative steps. A reference orientation adjustor receives tracking data for the pelvic frame of reference, and the femoral frame of reference associated with the first trackable reference, to orient the femoral frame of reference in a reference orientation with respect to the pelvic frame of reference, and to produce a reference adjustment value as a function of the reference orientation. A surgical parameter calculator receives tracking data from the registration tool to calculate surgical parameters as a function of the reference adjustment value, the surgical parameters at the two sequential operative steps being related by the reference orientation.

An IVUS catheter is advantageously provided with a particular radio-opaque pattern enabling detection of catheter rotation angle with respect to an X-ray imaging source for co-registering IVUS image data with angiographic X-ray or CT image data, for example. An ultrasound catheter system supports orientation and display of intra-vascular ultrasound imaging data. The system comprises an ultrasound catheter for acquiring ultrasound images comprising a body having a pattern of radio-opaque material on the external surface of the catheter body. The pattern varies with angular rotation of the catheter and indicates an angle of rotation of a predetermined reference orientation of the catheter relative to an X-ray radiation source, so that an X-ray image of the catheter body indicates the pattern and the pattern is analyzable by an image data processor to determine the angle of rotation.

An information display device includes: an image display unit that displays an image according to an orientation of a display screen; a terminal posture detection unit that detects a posture of the device using an acceleration sensor, an angular velocity sensor, and a geomagnetic sensor; and a display direction determination unit that determines whether or not the posture of the device changes, and determines the orientation of the display screen. In the case where the display screen is substantially horizontal and the posture of the device changes, the orientation of the display screen is determined so that, when the device moves by a predetermined angle or more with respect to the orientation (reference orientation) of the display screen before the determination of the posture change, a side of the device at the predetermined angle or more from the reference orientation corresponds to the top of the display screen.

A document imaging system detects skew and/or size of a document. In one embodiment, a document imaging system generates scanning signals representing the documents, analyxes the scanning signals to detect one more edges of the document before the entire lenght of the document is scanned, establishes a skew angle between the detected edges and a reference orientation, and modifies the scanning signals to compensate for skew while the document is being scanned. In another embodiment, a document imaging system detects one or more edges of a document, defines a polygon having sides substantially congruent with the detected edges, and establishes the size of the document in response to the polygon.

A method and system are provided to measure cardiac motion data using a cardiovascular navigation system. The method and system position a patient reference sensor (PRS) on a patient, wherein the PRS determines a position of the patient relative to a reference point. The method and system determine a reference orientation matrix based on an orientation of the PRS relative to a reference point and determining a normalization time based on an electrical signal. The method and system obtain point specific (PS) motion data for a plurality of map points. The PS motion data indicates a three dimensional trajectory that occurs at the corresponding map point on a wall of a heart of the patient during at least one cardiac cycle. Further the method and system compensate the PS motion data based on the PRS.

A camera device (1) comprising a support structure (10), a primary camera (16) carried by the support structure, and a secondary camera (15) carried by the support structure. When the primary camera (16) is operated to capture an image of an object, the secondary camera (15) captures an image of a user of the camera device (1). An orientation detector (17) is connected to the secondary camera (15), configured to identify images features in the image captured by the secondary camera, such as the eyes and mouth of the user, and to determine rotation orientation of the image relative to a reference orientation. A data storing device (20, 21) is configured to store image data of images captured by the primary camera in an orientation dependent on determined rotation orientation. This way all images may be stored in a common orientation, regardless of which orientation the camera device was held in when the images were captured.

A method and apparatus for calculating the radiated sensitivity of a mobile terminal positioned in multiple test orientations for multiple combinations of frequency channel and mobile terminal configuration is described herein. Test equipment measures a reference sensitivity of the mobile terminal when the mobile terminal is positioned in a reference orientation. Further, the test equipment estimates an antenna gain associated with a mobile terminal antenna when the mobile terminal is positioned in a test orientation. The test equipment then adjusts the reference sensitivity, based on the estimated antenna gain, to calculate the sensitivity of the mobile terminal positioned in the test orientation.

An electronic device, preferably in the form of a mobile phone, comprising a support structure and a camera carried by the support structure. An orientation detector is connected to the camera. The orientation detector is configured to identify images features in an image captured by the camera, such as the eyes and the mouth of the user, and to determine rotation orientation of the image relative to a reference orientation. A display carried by the support structure is configured to display a data representation, and further to display this data representation in an orientation dependent on the determined rotation orientation. This way a data presentation can e.g. be displayed in a portrait orientation or in a landscape orientation in dependence of which rotational orientation the device is currently held in when the data representation is viewed by a user of the electronic device.

The embodiment of the invention provides a method and a device for determining a coordinate system conversion parameter of an imaging device, an electronic device and a computer readable storage medium. The method is characterized by acquiring a reference value of the coordinate system conversion parameter and a reference image captured by the imaging device, wherein the reference value is determined when the imaging device is at a reference position and a reference orientation in a world coordinate system, and the reference image is captured when the imaging device is at the reference position and the reference orientation; responding to a change of at least one of the position and orientation of the imaging device in the world coordinate system, and determining an offset of a target image captured by the imaging device after the change occurs relative to the reference image; correcting the offset based on a corresponding coordinate of a reference pixel point in the reference image inthe world coordinate system; and acquiring a target value of the coordinate system conversion parameter based on the reference value and the corrected offset. In the invention, operation is simple, calibration efficiency is high, and precision guarantee is provided for road side perception of automatic driving and autonomous parking.

A device may include a camera to capture an image; a sensor to measure, when the camera captures the image, information indicative of an angular displacement, about a line of sight of the camera, of an orientation of the device away from a reference orientation of the device; storage to store the measured information for rotating the image relative to a frame of the image based on the angular displacement.

A system and method for determining errors and calibrating to correct errors associated with field sensors, including bias, scale, and orthogonality, includes receiving and providing to a processor angular rate data and a first field vector relative to a first reference directional field and a second field vector relative to a second reference field from at least one field sensor. The processor is configured to relate the first field vector and the second field vector to the angular rate data to determine an error of the at least one field sensor. The processor is also configured to identify a compensation for the error of the at lease one field sensor needed to correct the first field vector and the second field vector and repeat the preceding to identify changes in the error over time and compensate for the changes in the error over time.

In a situation where a plurality of virtual sound sources are fixedly located, a mixing system allows a listener to increase or decrease the sound volumes of the virtual sound sources with a simple operation. Directional angle difference detection means 24 detects a directional angle difference between a predetermined reference directional angle and an indicated directional angle which is determined by the listener by pointing with an operation unit 7 a certain direction in a virtual space where the virtual sound sources exist. Mixing means 5 mixes a plurality of audio signals supplied from a plurality of audio channels and outputs a mixed audio signal without adjustment, when the directional angle difference is zero degrees. When the directional angle difference is other than zero degrees, the mixing means 5 creates a situation where the plurality of virtual sound sources are fixedly located with respect to the reference directional angle, and mixed the plurality of audio signals so that the sound volumes of one or more sound sources arranged in a direction of the indicated directional angle may be larger than those of the one or more sound sources at the time that the directional angle difference is zero degrees.

In one aspect of the invention, an image monitoring apparatus has a plurality of display windows created on a single screen for presenting target objects existing within a monitoring area, wherein an image of the monitoring area and an image of a particular portion of the monitoring area are displayed in separate display windows with reference directions of the individual images aligned independently of each other with a specified direction of the screen. In another aspect of the invention, an image monitoring apparatus capable of detecting target objects existing within a monitoring area and displaying an image of detected target objects on a screen makes it possible to set a particular area of interest within the monitoring area, wherein the apparatus continuously displays a target image of the area of interest regardless of a movement of a point of observation or a change in the direction of the area of interest.

The invention relates to a navigational positioning method based on sky polarization distribution model matching. The method comprises the following steps: taking a positive direction of a mobile robot as a 0-degree reference direction, photographing the sky above the mobile robot in real time by employing a polarization camera, acquiring a real-time sky polarization distribution false color image through calculation and synthesis; performing local feature modeling on the sky polarization distribution false color image; performing stable feature point extraction and feature matching on the local features of the sky polarization distribution false color image, and obtaining an affine transformation relationship between the sky polarization distribution model diagrams; and calculating the position and navigational direction of the mobile robot. According to the method, the polarization distribution of the whole sky is not required to be obtained; the local feature information of the sky polarization distribution is utilized, so that the navigational direction of the mobile robot can be acquired from the sky polarization distribution, and the position of the mobile robot can be acquired; and the method is not required to depend on prior knowledge and is high in environmental adaptivity and high in accuracy.

The invention discloses an all-angle and rapid fingerprint recognition method that makes recognition according to fingerprint details: a. image preprocessing: using local gray level variance method to segment out the area of the fingerprint image; using a directional filtering method to realize binaryzation of fingers in the area of the fingerprint image; using an improved blend OPTA algorithm to make refining treatment to the binary image; b. fingerprint feature extraction: using Poincare method to test and make statistic of the number of core points of fingerprint to make sure of the reference point of fingerprint and the reference direction of fingerprint, and to extract the information of fingerprint feature point in the thinned fingerprint image; c. feature matching: taking the reference point as the point of origin, and taking the reference direction as the principal axis; using a polar coordinate to signify the fingerprint feature point axis, which is taken as characteristic data of template fingerprints; matching the data with the characteristic data of master plate fingerprints to judge whether to anastomose. The novel method can effectively restrain the influence brought from the parallel movement and rotation of the fingerprint image, and can rapidly make out judgement, thereby being suitable for a plurality of running platforms such as large-scale computers, DPS, embedded systems, satisfying the requirements on various personal identification occasions, and having broad market prospect and extremely high economic value.