95results about How to "Reduce computing needs" patented technology

The invention discloses an intelligent transportation moving object detection tracking method which is used for detecting and tracking a moving object in an intelligent transportation video. The intelligent transportation moving object detection tracking method comprises the following steps: considering objects with obvious edge characteristics such as guard bars in the middle part and on the two sides of a road in a video frame image; adopting a finite difference first-order partial derivative matrix to calculate the gradients of an input front video frame image and a back video frame image, and extracting a fine outline of an input image characteristic area; performing outline connection, area filling consolidation and morphological processing to obtain a preprocessed image; adopting an improved SIFT algorithm to extract key points from the preprocessed image, and only establishing a six-layered Gaussian pyramid for the preprocessed image, so as to ensure the situation that a few of key points can be detected when the image is changed in a small scale, meanwhile reduce redundant calculation requirement on establishing the pyramid, and improve the time efficiency of the algorithm; before frame difference, the image of the video sequence front frame and back frame is rectified by utilizing an affine transformation model obtained by the preprocessed image, so as to eliminate the influence of the video frame shift on performance detection.

The invention discloses a RFID (Radio Frequency Identification) security authentication method based on an EPC (Electronic Product Code) C-1G-2 standard. The method is used for solving the technical problem of poor security of the existing RFID security authentication method based on the EPC C-1G-2 standard. A technical scheme is that a tag and a reader use cyclic redundancy check codes (CRC), a pseudo random number generator (PRNG) and bitwise exclusive OR operations, so that known security holes of the existing RFID authentication scheme are solved, tag tracking attacks are resisted effectively, and tag forward security is ensured. Moreover, the method meets the EPC C-1G-2 standard of the low-cost RFID tag, reduces demands on storage and calculation of the tag and can be well suitable for the requirement on application of low-performance equipment.

The invention discloses a removal method and system for a bone tissue in a 3D CT (Three Dimensional Computed Tomography) image. The method comprises the following steps: reading a 3D CT image data sequence and dividing the sequence by using a clustering method; describing each marked supervoxel from supervoxel level, pixel level and supervoxel neighborhood relation level respectively to obtain a characteristic vector for describing each supervoxel; constructing a supervoxel training set, training a classifier by using the characteristic vector corresponding to the supervoxel, then classifying the supervoxel by using the trained classifier and marking the category; if a certain supervoxel is marked as the bone tissue according to a supervoxel mark value, removing the supervoxel from the original CT data, and otherwise, remaining. The supervoxel obtained by dividing the 3D CT data is used as a basic operation unit, bone tissue templates on different parts are not required to be learnt and trained, and meanwhile the problem of inaccurate bone tissue extraction caused by mismatching of the templates is also avoided.

The invention discloses a magnetic resonance fingerprint imaging based quick dictionary search method. The magnetic resonance fingerprint imaging based quick dictionary search method comprises the steps of S1, running an MRF scanning sequence for any given MRF scanning sequence and scanning parameters thereof by a magnetic resonance scanning device to obtain a magnetic resonance fingerprint S actually collected at each pixel position; S2, searching a physical characteristic parameter corresponding to each pixel, wherein the step of searching the physical characteristic parameter corresponding to one pixel comprises the sub-steps of matching the magnetic resonance fingerprint signal S of the pixel with the corresponding signal directory D and finding a matching item most proximal to the magnetic resonance fingerprint S of the pixel, and the most proximal matching item is the physical characteristic parameter of the pixel; and S3, integrating the physical characteristic parameters of all the pixels respectively to obtain a needed complete physical characteristic image. The magnetic resonance fingerprint imaging based quick dictionary search method can efficiently reduce the search calculation complexity, can reduce the calculation time and can improve the search efficiency.

The invention provides a method and device for acquiring an energy spectrum and a device for setting an energy window. A voltage comparator is in communication connection with a detector module and receives a flicker pulse signal sent by the detector module; a DAC (digital to analog converter) is in communication connection with the voltage comparator and transmits threshold information to the voltage comparator; the voltage comparator sends a flicker pulse signal that meets the threshold information to a counter; a control and storage unit is coupled to the counter and stores and records thecount information, and the control and storage unit is also connected to the DAC and stores and records the threshold information. The method comprises the following steps of: setting a threshold of the DAC and resetting the counter; using the counter to record the pulse number of flicker pulses whose amplitude exceeds the threshold within a T time period; setting the threshold of the DAC again, resetting the counter, and then recording the pulse number of flicker pulses whose amplitude exceeds the threshold within the T time period, and repeating the operation until the threshold is zero. Themethod and device for acquiring the energy spectrum and the device for setting the energy window can effectively reduce the cost and complexity of systems such as PET and SPET, and reduce the system's demand for computing resources and time.

A method of redundantly encoding data includes formatting the data into columns and rows, and generating first and second sets of projections of the data using an encoding transform. For each set of projections generated, an encoding parameter of the encoding transform is set to a different value. The first and second sets of projections are stored as the encoded data. A decoding method reads settings including an indication of a number of data fragments. The number of data fragments is compared to a number of projections in a first set of projections of the encoded data in order to determine whether to use a first or a second decoding mode. The encoded data is then decoded according to the selected decoding mode and the result is outputted.

A detector for determining a position of at least one object is disclosed and includes at least one sensor element having a matrix of optical sensors, the optical sensors each having a light-sensitive area. Each optical sensor is designed to generate at least one sensor signal in response to an illumination of its respective light-sensitive area by a light beam propagating from the object to the detector. The sensor element is adapted to determine at least one reflection image. The detector also includes at least one evaluation device adapted to select at least one reflection feature of the reflection image at least one first image position in the reflection image. The evaluation device is adapted to determine at least one reference feature in at least one reference image and at least one second image position in the reference image corresponding to the at least one reflection feature.

The invention relates to access authentication of power terminal equipment, and aims to provide a power terminal cloud edge-end cooperative security access authentication method based on edge computing. The method comprises one-time authentication when the power terminal is accessed and continuous authentication after the power terminal is accessed, wherein the one-time authentication is jointly participated by the power terminal, the edge device and the cloud platform, and the continuous authentication is only participated by the power terminal and the edge device. According to the invention, a continuous authentication link is introduced to enhance security, and a lightweight identity authentication mechanism is realized by a password and non-password means. According to the method, mechanism design is carried out by using the white list, the digital signature and the challenge response, so that feasibility is guaranteed; in terms of security, one-time complex authentication is considered to fully ensure access security during access, and continuous simple authentication after access is used as a supplement to improve the security; and the advantages of edge calculation are fully played in conciseness, and a simple authentication mechanism is selected to reduce calculation pressure.

The invention provides an abnormal signal orientation method in a pipeline. The method comprises the following steps of: acquiring and extracting output signals of two transmitters of a preset time length as first acquired data; performing normalization processing, mean adjustment and bipolar processing of the output signals on two frames of data of the first acquired data to obtain second acquired data; searching a signal maximum extreme value from the two frames of data of the second acquired data according polarity of the signal and performing trailing edge processing of an abnormal signal on the two frames of data of the second acquired data to obtain third acquired data; performing forward and backward bidirectional one-time linear interpolation of M-1 points on any path of signal for the third acquired data to form two interpolation sequences; and calculating cross correlation coefficient curves of the two sequences and another signal sequence respectively to obtain propagation direction of a pipeline leakage signal. According to the method, the propagation direction of the abnormal signal in the pipeline can be reliably determined.

An apparatus for generating encoded data includes processing circuitry configured to encode data using a Mojette transform (MT) based on generating encoded representations of data blocks. Generating the encoded representations of data blocks includes reading data in the form of a data block formatted according to specified settings to comprise rows and columns, creating a set of projections, and outputting the created set of projections to enable storage of the data in the form of the set of projections. The apparatus then transmits the encoded data over a network to another device. Additionally, creating the set of projections includes applying the Mojette transform on the data block, and creating a first number of projections based on mapping each row of the data block to a corresponding projection, wherein the first number of projections carries the same information as a corresponding row.

A method for adaptively learning is described that effectively and efficiently uses large amounts of data. Specifically, in one example, a scheme is described for determining whether to use data to adaptively learn parameters, or whether to discard the data. In this way, convergent data learning is possible.

Embodiments of the invention relate to audio signal processing. An audio signal possesses a plurality of audio objects. The invention discloses a method of processing the audio signal. The method comprises the following steps of acquiring an object position aiming at each audio object; based on a set of the object position, a plurality of gains of objects to clusters and a measurement standard, determining cluster positions used for grouping the audio object into clusters, wherein the measurement standard indicates quality of the cluster positions and quality of the gains of objects to clusters; each cluster position in the cluster positions is a center of mass of a corresponding cluster; and one gain in the gains of objects to clusters defines a ratio of a corresponding audio object in one cluster. In the method, the set based on the object position, the cluster positions and the measurement standard is included and the gains of objects to clusters is determined; and based on the determined cluster positions and the gains of objects to clusters, a cluster signal is generated. The invention also discloses a corresponding system and a computer program product.

The invention discloses a non-invasive resident load sudden change event three-threshold detection method and system, and the method comprises the steps: firstly carrying out the high-sensitivity detection through employing low-threshold resident entrance side high-frequency sampling data, and detecting all possible load sudden change event segments; secondly, carrying out similar splicing on thedetected load sudden change event sections on a time scale according to a time threshold value, so as to completely obtain a sudden change whole process of various start-stop events such as a long start event and the like; and finally, judging the complete event set by using a high threshold, screening effective load mutation events, and filtering disturbance mutation generated by load fluctuation. According to the method, the input and removal moments of various types of loads are quickly and accurately positioned, the transient interval interception precision of the sudden load change eventis improved, and meanwhile, the method has outstanding advantages in the aspect of solving the slow-rise type sudden load change event detection.

The invention provides a load balancing method and device. The method includes the following steps that: N processing threads are established, wherein each thread corresponds to M connection channels; the N processing threads receive connection requests sent by user terminals through the connection channels according to a predetermined order; the received connection requests are sent to a server according to load balancing strategies; and acknowledgement characters (ACK) sent by the server are received and are sent to the user terminals. With the load balancing method and device of the invention adopted, the connection requests received by each connection channel can be transmitted to the server according to corresponding load balancing strategies, and therefore, the computational requirements of the user terminals can be reduced, and requirements of load balancing for network topology in an cluster system can be lowered, and the scalability of clusters can be improved.

The invention provides a detection tracking algorithm optimization method based on a multi-core heterogeneous platform. The method comprises the following steps: firstly, zooming an input 1920 * 1080high-definition image into two output resolution images by adopting a GC620 graphic accelerator, namely a resolution of 300 * 300 and a resolution of 300 * 300 for detection of a detector; 2, zoomingto the resolution of 720 * 576 for tracking on the zoomed image by the tracker. By use of the frame-level pipeline of object detection and the object-level pipeline of target tracking, the calculationefficiency is improved. The cache object information is stored in the on-chip SRAM, so that the calculation efficiency is improved. A multi-core heterogeneous platform is used for carrying out distributed calculation on a filter module on C5 and P6, so that the calculation efficiency is improved. And meanwhile, by utilizing the KCF response value, the calculation requirement of the classificationfilter is further reduced.

The invention provides a data isolation exchange and security filtering method orienting electric power internet of things. The method comprises: (1) constructing an isolation framework based on a preposition agent and a special protocol; (2), carrying out feature vector extraction at the preposition agent part; (3), carrying out label package at the preposition agent part, carrying out label analysis at an isolation service side; (4), carrying out label filter at the isolation service side; (5), carrying content filter at the isolation service side combining the feature vector and the label filter. According to the invention, complete protocol isolation is realized through introducing the preposition agent and private application layer protocol, and the isolation intensity is greatly improved.

In one example, a method for exiting an object detection pipeline includes determining, while in the object detection pipeline, a number of features within a first tile of an image, wherein the image consists of a plurality of tiles, performing a matching procedure using at least a subset of the features within the first tile if the number of features within the first tile meets a threshold value, exiting the object detection pipeline if a result of the matching procedure indicates an object is recognized in the image, and presenting the result of the matching procedure.

A method for generating and transmitting a multicarrier signal representing data symbols, where the multicarrier signal is a linear combination of subcarriers, is disclosed, as well as a transmission entity. The generation and transmission is characterized by

• modulation of base signals with the data symbols, wherein each one of the base signals is a weighted sum of the subcarriers, whereby each one of the subcarriers is weighted by an element of a weighting vector residing in a nullspace of a constraint matrix, wherein
• the constraint matrix represents constraints limiting a magnitude of the multicarrier signal's Fourier transform at frequencies outside a designated bandwidth.