8 results about "Shift vector" patented technology

A computing device performs a method of decoding video data by determining a co-located picture of the current coding unit; locating a spatial neighbor block of the current coding unit that corresponds to the co-located picture; determining a motion shift vector for the current coding unit from one or more motion vectors associated with the spatial neighbor block according to a predefined fixed order; and reconstructing a sub-block-based temporal motion vector for a respective sub-block of a plurality of sub-blocks in the current coding unit from a corresponding sub-block in the collocated picture based on the motion shift vector.

A computing device performs a method for decoding video data comprising: determining a co-located picture of a current coding unit; locating a spatially adjacent block of the current coding unit corresponding to the co-located picture; determining a motion shift vector for the current coding unit from one or more motion vectors associated with the spatially adjacent block according to a predetermined fixed order; and reconstructing a sub-block-based temporal motion vector for a plurality of sub-blocks of the current coding unit from a corresponding sub-block within the co-located picture based on the motion shift.

This invention discloses a supercritical airfoil flow field prediction system and method based on a dual-branch neural operator, belonging to the field of airfoil flow field prediction technology. It includes a physical condition extraction module for receiving airfoil geometry and angle of attack and calculating wall distance features; a multi-order Fourier encoding module for performing multi-resolution Fourier encoding on the flow field spatial coordinates to generate coarse and fine grid Fourier features; a multilayer perceptron supernetwork module for generating scaling and shift vectors based on geometry and angle of attack; and a decoder dual-branch backbone network, including a reference multilayer perceptron network and a residual multilayer perceptron network, which respectively receive coarse and fine grid features and output low-frequency reference flow field signals and high-frequency residual flow field signals, which are then superimposed to obtain a complete flow field prediction result. This invention overcomes the spectral bias problem of traditional surrogate models through explicit frequency decoupling, achieving high accuracy in shock wave localization and surface load prediction, while significantly accelerating computation compared to CFD solvers.

Devices, systems, and methods for automatically shifting agricultural guidance lines are disclosed. A system receives a field boundary, a stored AB path with an associated first guidance width, and a target guidance width for a current operation. The system determines a shift vector comprising a direction and magnitude based at least in part on the relationship between the stored AB path and the field boundary, generates a first guidance path by applying the shift vector, generates a plurality of parallel guidance paths at spacings corresponding to the target guidance width, and commands an automatic steering system to traverse the guidance paths. The system can apply selective regional shifts based on terrain, enforce boundary clearances, reconcile prior line nudges or sensor-detected crop row positions, and synchronize datasets with cloud services to preserve consistency across operations and equipment widths.

The invention relates to the technical field of map making, and discloses a multi-element coordinated shifting method for keeping a topological relation, which comprises the following steps of: acquiring original data of a vector map, cleaning geometric coordinates, and generating preprocessed vector map data; performing topological relation classification and constraint strength assignment on the vector map data to generate the total constraint strength of each map element; meanwhile, by calculating the minimum Euclidean distance of boundary points between the map elements and combining the minimum safety distance between the elements of the map making specification, the conflict degree of any two map elements is generated; on the basis of the total constraint strength of each map element and the conflict degree of any two map elements, constructing a shift objective function, performing iterative solution by adopting a gradient descent method, and generating an optimal shift vector of the map elements so as to realize coordinated shift of the map elements; according to the method, global optimal shifting is achieved, conflict transfer is avoided, shifting efficiency is improved, and map precision and topological integrity are guaranteed.

An apparatus for decoding encoded grid data is configured to: receive one or more syntax elements in a bitstream of encoded grid data; determining an offset value based on the one or more syntax elements; determining a transformation coefficient set; applying the offset to the set of transform coefficients to determine an updated set of transform coefficients; performing inverse transformation on the updated transformation coefficient set to determine a displacement vector set; and determining a decoding grid based on the set of displacement vectors.

A computing device performs a method of decoding video data by determining a co-located picture of the current coding unit; locating a spatial neighbor block of the current coding unit that corresponds to the co-located picture; determining a motion shift vector for the current coding unit from one or more motion vectors associated with the spatial neighbor block according to a predefined fixed order; and reconstructing a sub-block-based temporal motion vector for a respective sub-block of a plurality of sub-blocks in the current coding unit from a corresponding sub-block in the collocated picture based on the motion shift vector.

A computing device performs a method of decoding video data by determining a co-located picture of the current coding unit; locating a spatial neighbor block of the current coding unit that corresponds to the co-located picture; determining a motion shift vector for the current coding unit from one or more motion vectors associated with the spatial neighbor block according to a predefined fixed order; and reconstructing a sub-block-based temporal motion vector for a respective sub-block of a plurality of sub-blocks in the current coding unit from a corresponding sub-block in the collocated picture based on the motion shift vector.