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50 results about "Matrix entry" patented technology

Dimension of Matrix. The dimensions of a matrix refer to the number of rows and columns of a given matrix. By convention the dimension of a a matrix are given by number of rows • number of columns One way that some people remember that the notation for matrix dimensions is rows by columns (Rather than columns by rows) is by recalling a once popular-soda:

Video advertisement detecting method based on explicit type sharing subspace

The invention discloses a video advertisement detecting method based on an explicit type sharing subspace, belonging to the technical field of multimedia index. The method comprises the steps of: firstly, cutting the lens to a semantic lens sequence; extracting a key frame therein and obtaining the visual feature and an audio feature, further obtaining the explicit type sharing subspace and the feature value of a mapping matrix formed by both; then obtaining the visual feature mapping matrix and the audio feature mapping matrix via selecting the corresponding vector of the feature value of the pointed mapping matrix in the explicit type sharing subspace; realizing the operation of reducing dimensions and fusing features; inputting the matrix obtained by fusing features to a support vector machine to train; after obtaining the optimal classification model, performing the primary judgment on the lens to be detected by using it; and then confirming whether the lens to be detected is the advertisement lens finally via the step of the post treatment. The invention is not required to build the advertisement database; the vector playing the main role is used for detecting the lens; at last, the lens is judged via the step of post treatment, and therefore improving the effectiveness and the accuracy of detecting.
Owner:BEIJING JIAOTONG UNIV

Large-scale MIMO linear detection hardware framework under non-ideal communication channel, and detection method

The invention discloses a large-scale MIMO linear detection hardware framework under a non-ideal communication channel. A channel response matrix is enabled to sequentially pass through a triangular pulsation multiplication module and a noise addition module, and enters into a three-diagonal inversion module and a three-diagonal multiplication module. The three-diagonal inversion module selects three-diagonal elements in a matrix outputted by the noise addition module to form a three-diagonal matrix, and carries out the inversion calculation of the three-diagonal matrix. The triangular pulsation multiplication module enables the matrix, which is outputted by the noise addition module, after three diagonals are removed to multiply with a three-diagonal inversion matrix obtained from the three-diagonal inversion module. The results of the three-diagonal inversion module are inputted to a three-diagonal addition module, and the results of the three-diagonal multiplication module are inputted to a lower triangular pulsation multiplication module. The three-diagonal addition module and the lower triangular pulsation multiplication module enable a generated matrix to be inputted to a detection module after loop iteration. The framework reduces the hardware complexity, greatly reduces the calculation complexity, and greatly reduces the throughput rate.
Owner:SOUTHEAST UNIV

Signature authenticity identification system for signature pen

The invention discloses a signature authenticity identification system for a signature pen. The system comprises an information entry module, a sample database module, a feature model building module,a feature extraction module, a similarity measurement module and an identification and output module. The identification process is that the feature model building module carries out spatial modelingon feature information collected by the information entry module, the feature parameters of relationship of two types of features including writing horizontal pressure and a holding pen posture withtime and handwriting length are extracted from a spatial geometric model, and a matrix input system is constructed. The average information entropy of each type of features is used to calculate a weight coefficient, and a comprehensive feature similarity of information to be measured and sample information are calculated with the combination with a method of matrix similarity measurement. In the identification and output module, the comprehensive similarity and similarity thresholds corresponding to different signers are compared, and the authenticity of a signature is identified and a final authentication result is outputted. The invention provides signature authentication and identity authentication methods, and the result is objective and stable.
Owner:HOHAI UNIV CHANGZHOU

Fingerprint epipole accurate positioning method based on image spatial domain characteristic

The invention discloses a fingerprint epipole accurate positioning method based on an image spatial domain characteristic. The method comprises the following concrete steps: solving a pixel-grade direction field O of a fingerprint image by use of a gradient method; extracting each coarse epipole position in the direction field O by use of a Poincare index method; calculating a binary image I of the fingerprint image by use of a short time Fourier transform method; inputting the direction field O, the coarse epipole positions and the binary image I into a bifurcation aggregation extraction module, and extracting all bifurcation points fc and aggregation points gh within an a*b rectangular scope nearby the coarse epipole positions for storing in a matrix FJi; inputting the matrix FJi into a denoising module to remove all pseudo bifurcation points and pseudo aggregation points of the matrix FJi so as to obtain a matrix FJi<->; inputting the matrix FJi<-> obtained after denoising into an arc extraction module to obtain all arcs, and storing the obtained arcs in a matrix Hu; and inputting the matrix Hu into a precision positioning module to obtain a final result of epipole positioning. According to the invention, spatial domain information of the fingerprint image is utilized, and the detection precision is improved while the epipole detection consistency is maintained.
Owner:SHANGHAI ZAIDE INFORMATION SCI & TECH

Face recognition method based on dictionary learning models

The invention discloses a face recognition method based on dictionary learning models. The method comprises the following steps of: mapping trained and tested face images to a low-dimension space to acquire a training signal set matrix; establishing the dictionary learning models which comprise an irrelevant dictionary learning (IDL) model and an unconstrained irrelevant dictionary learning (U-IDL) model; inputting the training signal set matrix into the IDL and U-IDL models, and solving the models to acquire an irrelevant dictionary and a linear classifier; acquiring a corresponding sparse vector of each picture belonging to a test sample based on the dictionary acquired in the last step by using a sparse expression algorithm; and inputting the sparse vectors into the linear classifier to acquire category labels of test sample pictures, wherein the result expressed by the category labels is used as the face recognition result. The invention provides the new models and the new method for dictionary learning problems in sparse expression, and the models and the method can be applied to mode identification and image classification problem under common conditions; and particularly, aiming at face recognition application, the dictionary learning method can achieve relatively high face recognition accuracy.
Owner:PEKING UNIV
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