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131 results about "Binary logic" patented technology

Binary logic, also referred to as two-value or Boolean logic, is a set of rules for dealing with propositions that must be either true or false. Its primary applications are in computer programming and mathematics, although there are also recreational games and puzzles based upon more formal logic.

Data evaluation method and device, terminal equipment and storage medium

The invention discloses a data evaluation method and device, terminal equipment and a storage medium. The method comprises the following steps of carrying out preprocessing on sample variables in a sample data set in order to obtain nominal variables which are ordered according to the sizes of characteristic values; carrying out one-hot coding on the nominal variables which are ordered according to the sizes of the characteristic values, and converting the nominal variables into digital variables; applying a gradient lifting decision-making tree algorithm to the sample data set containing thedigital variables; generating a decision tree model comprising n decision trees; and acquiring combined characteristics by adopting the gradient lifting decision-making tree algorithm. The accuracy ofprediction of the combined characteristics of sample data is improved, and the efficiency of acquisition of the combined characteristics is also improved, so that the combined characteristics are used as input characteristics of a binary logic regression model to carry out prediction of a preset event result, and thus the complexity and the uncertainty of manual searching of the characteristics are avoided, the prediction accuracy of the sample data for the preset event result is improved, and meanwhile, the accuracy and the efficiency of sample data evaluation are also improved.
Owner:CHINA PING AN LIFE INSURANCE CO LTD

Medical image robust watermarking method based on Arnold scrambling transformation and DCT (discrete cosine transformation)

The invention discloses a medical image robust watermarking method based on Arnold scrambling transformation and DCT (discrete cosine transformation), belonging to the field of multimedia signal processing. The method comprises the following steps: firstly embedding a watermark, specifically including (1) carrying out Arnold transformation on the watermark to be embedded to implement the pretreatment, (2) carrying out overall image DCT transformation on a medical image, and extracting a vector of a feature in a transformation domain, (3) obtaining a binary logic sequence through a Hash function by using the feature vector and the pre-treated watermark; and then carrying out watermark extraction, specifically including (4) carrying out overall image DCT transformation on a medical image to be tested, and extracting a feature vector; (5) extracting the watermark by using the property of the Hash function and a binary logic sequence of a third party; and (6) obtaining the original watermark through inverse transformation of the Arnold scrambling transformation. The experiment shows that the method has a very good information hiding capability and is of great significance in protecting the information of a patient in telemedicine.
Owner:HAINAN UNIVERSITY

Watermarking method for medical images on basis of DFT (discrete Fourier transform) and LogisticMap

The invention relates to a robust watermarking method on the basis of DFT (discrete Fourier transform) and a Logistic Map, and belongs to the field of multimedia signal processing. The robust watermarking method includes preprocessing and embedding watermarks and then extracting and reducing the watermarks, and particularly includes steps of (1), generating a binary encrypted matrix by the aid of the Logistic Map; (2), obtaining encrypted watermarks; (3), performing DFT for an original image and extracting feature vectors; (4), generating a binary logic sequence by the aid of the feature vectors and the chaotically encrypted watermarks to complete the process for preprocessing and embedding the watermarks; (5), performing DFT for an image to be measured to extract vectors of a feature; (6), extracting watermarks by the aid of a Hash function and the binary logic sequence generated when the watermarks are embedded; (7), generating a binary encrypted matrix by the Logistic Map; and (8), solving the reduced watermarks so as to complete the process for extracting and reducing the watermarks. The robust watermarking technology has a high practical value in the aspect of protecting personal information of patients during remote medical treatment.
Owner:HAINAN UNIVERSITY
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