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62results about How to "Does not affect content" patented technology

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

DWT-DCT (Discrete Wavelet Transform-Discrete Cosine Transform) and Logistic Map-based medical image robust watermarking method

InactiveCN102945543AStrong resistance to conventional attacksStrong ability to resist geometric attacksImage data processing detailsThird partyFeature vector
The invention relates to a DWT-DCT (Discrete Wavelet Transform-Discrete Cosine Transform) and Logistic Map-based medical image robust watermarking method, which belongs to the field of multimedia signal processing. The method comprises preprocessing of a watermark and embedding of the watermark, wherein the preprocessing of the watermark and embedding of the watermark comprise the following steps of: (1) obtaining an encryption matrix by using a Logistic Map; (2) obtaining an encrypted watermark; (3) performing DWT on an original image, performing DCT on an approximation sub-image and extracting the vector of a characteristic; (4) obtaining a corresponding two-valued logic sequence by using the characteristic vector and chaotically encrypted watermark, storing the two-valued sequence at a third party, and then extracting and reducing the watermark, wherein the extraction and the reduction of the watermark comprise the following steps of: (5) performing operation similar to the step (3) on an image to be tested to solve one characteristic vector; (6) extracting the encrypted watermark; (7) generating a two-valued encryption matrix by using the Logistic Map; and (8) solving the reduced watermark. According to the method, the secrecy of information of a patient can be protected.
Owner:HAINAN UNIVERSITY

Intelligent integrated fertilization system with capacity of biogas slurry application

InactiveCN110122024ARealize integrated intelligent automatic fertilizationAvoid accumulationTreatment involving filtrationLiquid fertiliser regulation systemsSlurryWater soluble
The invention relates to an intelligent integrated fertilization system with capacity of biogas slurry application. The system comprises a water and fertilizer blending module, a water and fertilizerfiltering module, a water and fertilizer conveying module, a field monitoring and control module and an intelligent control module, wherein the water and fertilizer blending module is used for diluting biogas slurry and testing soil for formulated fertilization to meet the nutritional requirement of crop growth; the water and fertilizer filtering module is used for filtering the diluted water soluble fertilizer and the biogas slurry; the water and fertilizer conveying module is used for sufficiently mixing the matched biogas slurry and water soluble fertilizer and conveying the mixture througha pipeline; the field monitoring and control module is used for monitoring field weather information and crop growth information; the intelligent control module can realize automatic generation of anapplication operating account and can automatically control operation of all the modules through neural network and deep learning. The water and fertilizer blending module, the a water and fertilizerfiltering module, the water and fertilizer conveying module and the intelligent control module are highly integrated to an integrated box, labor can be effectively saved, labor intensity is reduced,and the system operates stably, is suitable for various irrigation pipeline systems, can scientifically and efficiently apply the biogas slurry, fertilizer and water and improves irrigation quality and efficiency.
Owner:福建省致青生态环保有限公司

Robust watermarking method for medical images on basis of Arnold scrambling transformation and DWT (discrete wavelet transform)-DFT (discrete Fourier transform)

InactiveCN102938133ASolve the quickness problemImplement secondary encryptionImage data processing detailsThird partyFeature vector
The invention discloses a robust watermarking technology for medical images on the basis of Arnold scrambling transformation and DWT (discrete wavelet transform)-DFT (discrete Fourier transform), and belongs to the field of multimedia signal processing. The robust watermarking technology includes embedding watermarks and then extracting the watermarks, and particularly includes steps of (1), performing Arnold transformation for watermarks to be embedded; (2), performing DWT for a medical image, performing DFT for approximation sub-images of the medical image, and extracting vectors of a feature; (3), generating a binary logic sequence via a Hash function by the vectors of the feature and the preprocessed watermarks so as to complete the process for embedding the watermarks; (4), performing DWT for a medical image to be measured, performing DFT for approximation sub-images of the medical image to be measured and extracting vectors of a feature; (5), extracting watermarks by the aid of the Hash function and a binary logic sequence stored in a third party; and (6), obtaining the original watermarks via Arnold inverse transformation so as to complete the process for extracting the watermarks. The robot watermarking technology has an important significance in protecting information of patients during remote medical treatment.
Owner:HAINAN UNIVERSITY

Method for preparing gonadorelin freeze-dried powder injection

The invention provides a method for preparing a gonadorelin freeze-dried powder injection, which comprises the following steps: dissolving mannitol and phosphate buffer salt, adding activated carbon, filtering after boiling, adding gonadorelin and preparing liquid medicine; pre-regulating the temperature of a condenser to below minus 40 DEG C, packing the liquid medicine into tube-type bottles, placing into a freeze-drying machine, reducing the temperature for 1h till the temperature of a plate layer is lower than minus 35 DEG C, and freeze-drying for 2h; then regulating the vacuum degree to below 20Pa, increasing the temperature within 1h till the temperature of the plate layer is 2-3 DEG C, and keeping the temperature for 3-4h; and regulating the vacuum degree to be 10-20Pa, increasing the temperature within 1h till the temperature of the plate layer is 12-14 DEG C, keeping the temperature for 2h, then continuously increasing the temperature within 1h to 36-38 DEG C and keeping the temperature for 3-4h. The method has the advantages that the method improves the technological steps of preparing the liquid medicine and freeze-drying, does not affect the content of the gonadorelin, simultaneously shortens freeze-drying time, further improves product stability, saves energy, increases production and reduces production cost.
Owner:MAANSHAN BBCA PHARMA

Chinese herb decoction tablet processing technique

The invention discloses a Chinese herb decoction tablet processing technique. The Chinese herb decoction tablet processing technique comprises the following steps of selecting, screening, cleaning, drying, crushing, examining, tableting and internally-packing raw herbs, wherein the raw herbs are American ginseng and cordyceps sinensis and are crushed and screened through a sixth screen of 100 meshes, and dextrin and polyethylene glycol of a certain amount are uniformly mixed in proportion and then tableted. The Chinese herb decoction tablet processing technique changes traditional taking manners such as a decocted manner, a brewing manner or a crushed and directly orally taking manner; the raw herbs are repeated screened, impurity-removed, crushed, dried, mixed and finally pressed into tablets, an appropriate amount of the dextrin is added into the raw materials to improve the taste of the prepared Chinese herb decoction tablet; meanwhile, the Chinese herb decoction tablet is convenient to carry and use by customers; besides, direct tableting has no influence on the content of effective constituents in the raw herbs; furthermore, mixed tableting embodies the effectives of reasonably combining Chinese herbs and enhancing therapeutic effects.
Owner:九珍堂健康药业(苏州)股份有限公司

Intelligent contract state monitoring system and method based on a block chain

The invention provides an intelligent contract state monitoring system based on a block chain. The system comprises a contract virtual machine which is used for operating an intelligent contract codeand ensuring independence and isolation of an intelligent contract, is internally provided with a plurality of monitoring modules and is used for receiving information sent by a contract monitor, packaging corresponding monitoring attributes or events at a monitoring point into formatted messages and transmitting the formatted messages to a dynamic event receiver; the contract monitor comprises two modules: a dynamic event receiver which is responsible for receiving and monitoring information obtained by the state of the intelligent contract; and the attribute verifier is responsible for expanding and analyzing the state of the intelligent contract and feeding back an analysis result to the contract virtual machine to complete a contract monitoring communication cycle. The invention further discloses a corresponding monitoring method, the dynamic code instrumentation is non-invasive, the monitoring module can be implanted into contract codes in a non-invasive mode in a memory, and dynamic code instrumentation is achieved. And the content of the intelligent contract code is not influenced while richer state information is obtained.
Owner:BEIJING WUZI UNIVERSITY

Video watermark realizing method against geometric attack based on three-dimensional discrete cosine transform (DCT)

The invention relates to a video watermark realizing method against geometric attack based on three-dimensional discrete cosine transform (DCT), which firstly embeds a watermark, and (1) global three-dimensional DCT conversion is carried out to an original video section, and a visual characteristic vector which resists geometric attack is extracted from a conversion efficient; (2) a binary logic sequence is worked out with the visual characteristic vector and the watermark to be embedded through a Hash function, and the binary logic sequence is stored in a third party, and the watermark is extracted; (3) the global three-dimensional DCT conversion is carried out to a tested video, and the characteristic vector of the video which resists geometric attack is extracted; and (4) the watermark is extracted with the characteristics of the Hash function and the binary logic sequence which is stored in the third party. The method,based on a three-dimensional DCT conversion video digital zero-watermark technology realizes the embedment of the watermark without affecting the video image, moreover the method has higher robustness and stronger attack resistant capability, and provides a powerful technical path for protecting the copyright of the video.
Owner:HAINAN UNIVERSITY

Three-dimension wavelet transform-based method for embedding multiple watermarks in volume data

InactiveCN102136125AGood compatibilityStrong resistance to conventional attacksImage data processing detailsWavelet transformThird party
The invention discloses a three-dimension wavelet transform-based method for embedding multiple watermarks in volume data, belonging to the field of multimedia signal processing. The method comprises watermark embedding and multi-watermark extraction, wherein the watermark embedding comprises the following steps: (1) performing three-dimension wavelet transform and global cosine transform on original data, extracting a geometric attack resistance characteristic vector from a transformation coefficient; and (2) obtaining a corresponding binary logic sequence through Hash function by utilizing the characteristic vector and multiple watermarks to be embedded, and storing the binary sequence in a third party; and the multi-watermark extraction comprises the following steps: (3) performing three-dimensional wavelet transform and global cosine transform on the 'volume data to be detected', and extracting the characteristic vector of the object in a transform domain; and (4) extracting the multiple watermarks by utilizing the characteristic of the Hash function and the binary logic sequence saved in the third party. experiments prove that the three-dimension wavelet transform-based technology for volume data embedding multiple watermarks in volume data has strong resistance against geometric and normal attacks.
Owner:HAINAN UNIVERSITY

Stereo display system, image processing method and device, equipment and storage medium

The invention provides a three-dimensional display system, an image processing method and device, equipment and a storage medium. The device comprises a curved display screen, a curved parallax grating and an image processing module, wherein the curved display screen is composed of a plurality of display pixel units which are sequentially arranged in columns, each display pixel unit comprises a first pixel, a second pixel and a third pixel which are sequentially arranged in columns, the first pixels are used for displaying a right-eye parallax image, the third pixels are used for displaying aleft-eye parallax image, and the second pixels are all-black pixels; the image processing module is used for generating a parallax image corresponding to the arrangement structure of the display pixelunits of the curved display screen according to an image source to be processed; and the curved-surface parallax grating is used for controlling a passable area of light rays emitted by the parallaximage displayed on the curved-surface display screen. According to the technical scheme, the curved screen and the curved parallax grating are combined, so that the degree of freedom of the three-dimensional display system is improved, and an immersive free three-dimensional impression is brought to a viewer.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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