180 results about "Point mapping" patented technology

The invention provides techniques for wrapping a two-dimensional texture conformally onto a surface of a three dimensional virtual object within an arbitrarily-shaped, user-defined region. The techniques provide minimum distortion and allow interactive manipulation of the mapped texture. The techniques feature an energy minimization scheme in which distances between points on the surface of the three-dimensional virtual object serve as set lengths for springs connecting points of a planar mesh. The planar mesh is adjusted to minimize spring energy, and then used to define a patch upon which a two-dimensional texture is superimposed. Points on the surface of the virtual object are then mapped to corresponding points of the texture. The invention also features a haptic / graphical user interface element that allows a user to interactively and intuitively adjust texture mapped within the arbitrary, user-defined region.

The invention relates to an image information processing technology, and provides an ultrahigh resolution panorama speed dome AIO (All-In-One) system, a video stitching method and a spatial registration method of the ultrahigh resolution panorama speed dome AIO system. A device comprises an engine base element, a panorama stitching video camera comprising multiple cameras, a speed dome, a controller, a shell and a support. The video stitching method comprises the steps of lookup table calculation, stitching line calculation, image fusion and the like. The spatial registration method comprises the steps of establishing a panorama stitching image coordinate system, uniformly dividing a panorama stitching image into a plurality of rectangular regions, sampling, calculating a mapping relation of sampling points and calculating a non-sampling point mapping relation by adopting a bilinear interpolation method. According to the ultrahigh resolution panorama speed dome AIO system, the video stitching method and the spatial registration method, provided by the invention, not only can panorama monitoring be realized, but also a high-resolution monitoring scene can be provided at the same time, and quick and accurate focus location, zoom out and zoom in and quick and stable browsing of an interested target can be realized through registration linkage between a panorama real-time stitching camera and the speed dome.

The invention provides a power-line carrier communication apparatus including a transmission unit with a signal point mapping device for mapping a plurality of bit streams produced from transmission data, a wavelet inverse transforming device for modulating the respective sub-carriers by wavelet waveforms which are orthogonal to each other for producing temporal waveform series data, and a D / A converter for converting the temporal waveform series data into an analog temporal waveform series signal; and a reception unit with an A / D converter for obtaining sampling-series waveform data from a power-line communication signal, a wavelet transforming device for wavelet-transforming the sampling-series waveform data into signal point data of the respective sub-carriers, and a symbol judging device for judging bit streams mapped by the signal point mapping device by inverse-mapping a plurality of these signal point data, and for synthesizing the judged bit streams with each other as a reception data series.

The invention discloses an encoding modulating method. In a modulating process, regular constellation mapping or irregular constellation mapping is carried out on bit data, so as to obtain a constellation mapping symbol, wherein the regular constellation mapping means that the mapping from a bit to a symbol is completed by adopting one constellation diagram and one constellation point mapping way, and the irregular constellation mapping means that the mapping from the bit to the symbol is completed by adopting one constellation diagram and more than one constellation point mapping ways. The invention further discloses a demodulation decoding method corresponding to the encoding demodulating method. In the invention, through using regular APSK (amplitude phase shift keying) constellation mapping at a sending end, the shaping loss can be obviously reduced, or by using irregular QAM (quadrature amplitude modulation) constellation mapping, the decoding and the de-mapping are matched more,so as to improve the transmission capability of an encoding modulating system, and through adopting iterative de-mapping at a receiving end, the loss brought by independent de-mapping can be effectively reduced, so as to obviously improve the performance of the encoding modulating system based on the iterative de-mapping.

The invention discloses a digital signal transmitting device and a digital signal receiving device as well as a digital signal modulation method and a digital signal demodulation method. The digital signal transmitting device and the digital signal receiving device of the invention are characterized in that the digital signal transmitting device and the digital signal receiving device comprise a plurality of constellation point mapping modules and a plurality of constellation point de-mapping modules respectively; and different QAM mapping is adopted between each mapping module and each de-mapping module. The digital signal modulation method and the digital signal demodulation method of the invention are characterized in that one code stream is divided into a plurality of sub code streams which are subjected to mapping, and correspondingly, one baseband symbol stream is divided into a plurality of symbol streams which are subjected to de-mapping. With the digital signal transmitting device and receiving device as well as the digital signal modulation method and demodulation method of the invention adopted, according to problems such as too many error-correcting code modes and performance loss of modulation modes such as 32QAM and 128QAM, the flexibility of code rate and receiving threshold can be realized through the modulation modes of hybrid constellation points, and therefore, the complexity of a system can be decreased, and performance can be improved.

An apparatus for mapping a gaze point of a subject on a scene image to a gaze point in a reference image, wherein said scene image and said reference image have been taken by a camera from a different position, said apparatus comprising: A module for executing a feature detection algorithm on said reference image to identify a plurality of characteristic features and their locations in said reference image; a module for executing said feature detection algorithm on said scene image to re-identify said plurality of characteristic features and their locations in said scene image; a module for determining a point transfer mapping that transforms point positions between said scene image and said reference image based on the locations of said plurality of characteristic features detected in said reference image and said scene image; a module for using said point transfer mapping to map a gaze point which has been determined in said scene image to its corresponding point in said reference image.

The invention relates to a combined efficiency evaluation method in tactical internet based on nodes and edges. The method comprises the following steps: constructing a first combat network topology model according to combat units and information transmission relationships among the units; respectively calculating the node degree of each node and the edge weight between the nodes in the first combat network topology model according to a preset algorithm, and respectively sorting and storing the node degree and the edge weight into a first array and a second array; selecting the edge with the minimum edge weight value in the first combat network topology model and the adjacent edge with the minimum edge weight value in the adjacent edge set, performing edge point exchange according to the affinity coefficient, and deleting invalid edge weights from the second array at the same time; until all nodes of the first combat network topology model are replaced by edges and edge point mapping is completed, obtaining a second combat network topology model; calculating node degrees of all mapping nodes in the second combat network topology model, and sorting and storing the node degrees in athird array; and combining the three arrays to analyze combat countermeasures.

The invention discloses a sphere decoding method, which comprises the steps of performing sequential decomposition of a channel matrix of a signal to be decoded, determining level number of a search space based on the row number of a matrix R, and determining Fano profile of each level; determining constellation point mapping value and metric value of a received signal on each level by using the elements in the matrix R, searching the search space from the last level of the search space with consideration of the influence of the Fano profile so as to effectively reduce number of searching branches, using the branch with minimum final metric value as a searching result, and using the constellation point mapping value corresponding to the branch to be the sphere decoding result. The inventive technical proposal can effectively reduce computational complexity of sphere decoding, and can balance performance and complexity by adjusting the size of the Fano profile.