9 results about "Reference array" patented technology

A camera tracking system receives patient reference tracking information indicating pose of a patient reference array tracked by a patient tracking camera relative to a patient reference frame. A local XR headset view pose transform is determined between a local XR headset reference frame and the patient reference frame. Remote reference tracking information is received indicating pose of a remote reference array tracked by a remote reference tracking camera. A remote XR headset view pose transform is determined between a remote XR headset reference frame of a remote XR headset and the remote reference array. A 3D computer image is transformed from a local pose determined using the local XR headset view pose transform to a remote pose determined using the remote XR headset view pose transform. The transformed 3D computer image is provided to the remote XR headset for display with the remote pose relative to the remote XR headset reference frame.

Embodiments disclosed herein provide systems and methods for testing and repairing various aspects of an electronic display. The electronic display includes a reference array and an active array. The electronic display also includes test circuitry for testing individual pixels or any combination of pixels of the electronic display. Switches can be disposed between the pixels and the test circuitry to repair various components of the electronic display.

The application is suitable for the technical field of phased array antenna calibration, and provides a phased array antenna calibration method, device, medium and antenna system.The method comprises the following steps: acquiring network level information of a phased array antenna; acquiring amplitude ratio of field strength amplitude of each antenna unit relative to field strength amplitude of a reference array field, phase difference value; acquiring a to-be-calibrated signal port and the like; and finally obtaining phase and amplitude adjustment amount of the to-be-calibrated signal port.The application has the advantages that the array overall amplitude consistency can be effectively optimized, the array overall amplitude consistency is improved, the array synthesized field quality is improved, the influence of single antenna unit measurement error or local anomaly on the overall calibration result is effectively reduced, and the stability of the calibration result is improved.

This invention provides a sound source localization method based on offline library construction of array element coordinates, which can be applied to the field of sound source localization technology. The method is applied to a localization array, which includes multiple array elements, among which a reference array element is included. The method includes: for each of the multiple array elements in any scanning direction within its scanning range; acquiring the scanning signal corresponding to each of the multiple array elements in its scanning direction; calling the fractional delay coefficient library and integer delay library corresponding to each of the multiple array elements; determining the fractional delay coefficient and integer sampling delay corresponding to each of the multiple array elements in its scanning direction; performing time delay compensation on the scanning signal to obtain the scanning compensation signal corresponding to each of the multiple array elements in its scanning direction; obtaining the signal spatial spectrum corresponding to any scanning direction based on the scanning compensation signal corresponding to each of the multiple array elements in any scanning direction; and determining the target direction of the sound source to be located within the scanning range.

A camera tracking system for computer assisted navigation during surgery. Operations identify stray markers in a frame of tracking data from tracking cameras, and identify stray markers of a reference array. Stray markers of the reference array are designated assigned status and, otherwise, designated unknown status. The operations designate other of the assigned status stray markers and any of the unknown status stray markers along a same epipolar line of the tracking cameras as one of the assigned status stray markers as being epipolar ambiguous status. For each one of the epipolar ambiguous status stray markers, the operations estimate 3D locations where phantom markers can appear in the frame based on epipolar ambiguity of the tracking cameras when determining location of the one of the epipolar ambiguous status stray markers. The operations designate the unknown status stray markers within a threshold distance of the estimated 3D locations of phantom markers as being phantom status.

Embodiments of the present application provide a resistance measurement circuit, a resistance measurement method, an electronic device and a resistance measurement device. The resistance measurement method is applied to the resistance measurement circuit, and the resistance measurement method comprises: acquiring a pull-up voltage output by a voltage generator to a voltage division detection circuit; determining a reference array resistance value of a reference resistance array based on an adjustable resistance range of the reference resistance array, and controlling the opening and closing states of all switches to make the current resistance value of the reference resistance array reach the reference array resistance value; acquiring a node voltage corresponding to a connection node between the reference resistance array and a to-be-measured resistance; and determining a target resistance value of the to-be-measured resistance based on the pull-up voltage, the node voltage and the reference array resistance value of the reference resistance array. The method controls the low-cost resistance measurement circuit to achieve efficient and accurate resistance value measurement of the to-be-measured resistance.

The application discloses a kind of application data reference management and garbage collection.The application data reference management method includes: when detecting that target application data is referenced by target variable, and target variable belongs to target variable type, the logical address of the target application data is written into the physical address of the target variable;The logical address corresponding to the physical address of target variable is written into the reference address table as a reference address.The technical scheme of the embodiment of the application uses the reference address table to manage the application data reference not recorded in the reference array, avoids mistaking such application data as garbage data and being deleted, thereby avoiding the empty exception caused by referencing non-existent application data, the reference address table records reference address instead of the logical address of application data, avoids the need to modify application data reference counter or the content in reference address table when reference relationship is cleared, and ensures application execution efficiency.

Video coding can use position dependent pixel combination (PDPC) for intra prediction with perspective. A prediction angle calculated at the third, sixth and twelfth pixels on the last row of a target block can be used to check angle scaling values of 0, 1 and 2, respectively. A non-negative scaling factor can indicate to apply normal PDPC, while a negative scaling factor can indicate to apply gradient PDPC. Anti-angles calculated at the first 3, 6 or 12 target pixels on each row corresponding to an angle scaling value of 0, 1 or 2, respectively, can be used to locate secondary reference samples for normal PDPC. An angle parameter at the secondary reference samples on the same row as the target pixels can be calculated / used to locate primary reference samples on a top reference array for gradient PDPC. A gradient between the reference samples can be used to modify an initial prediction value.

The specification discloses a near-field amplitude and phase calibration method, system and device of an active phased array radar antenna, relates to the technical field of phased array radar antenna calibration, and aims to solve the problem of poor robustness of the prior art in near-field calibration of the phased array radar antenna.The method comprises the following steps: performing plane scanning on each transmission channel one by one to obtain amplitude values and phase values of each transmission channel of the phased array radar antenna; calculating errors of the amplitude values and the phase values, and calibrating each transmission channel based on the errors; judging whether plane scanning needs to be performed again, if not, calculating amplitude values and phase values of a to-be-tested transmission channel; obtaining amplitude values and phase values of a reference array surface corresponding to the to-be-tested transmission channel, calculating errors between the amplitude values and the phase values, and recalibrating the to-be-tested transmission channel based on the errors.The method improves the compensation accuracy and efficiency of the radar antenna directional diagram, and solves the problem of poor robustness of amplitude and phase calibration of the active phased array radar antenna.