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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 4. Отображено 4.
27-06-2023 дата публикации

Watermark processing method and device

Номер: CN116340907A
Автор: ZHANG TIANYANG, CHEN XI, ZHU LEI, JIAO YAN, CAI YUXUAN, YOU DEGUANG, LIN JIAQIN
Принадлежит:

The invention relates to the technical field of network security and relates to a watermark related technical method, in particular to a watermark processing method and device. Through the transform domain watermarking method based on differential adaptive blocking, adaptive blocking can be carried out according to content features of a screen picture, the embedding position of a watermark is determined, and the imperceptibility and the attack resistance of the watermark are improved through the method of embedding the watermark in a transform domain. The image watermark can survive under artificial active attack and damage of various transmission environments, information can be extracted through the watermark in the leaked image without an original image during traceability, a full-blind extraction effect of the watermark is achieved, a leakage source is cut off in time, and the security degree of enterprise network data is improved.

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Номер записи: 1
28-04-2023 дата публикации

Screen image compression method based on color distribution

Номер: CN116033164A
Автор: JIAO YAN, YOU DEGUANG, CHEN XI, ZHANG TIANYANG, ZHU LEI, CAI YUXUAN, LIN JIAQIN
Принадлежит:

The invention discloses a screen image compression method based on color distribution, and belongs to the technical field of data compression, and the method comprises the steps: obtaining a screen image which can be divided into a plurality of macro block images with the same size; judging whether the macro block image is a natural image or not; under the condition that the macro block image is a natural image, compressing the macro block image by adopting a lossy compression mode; and under the condition that the macro block image is an unnatural image, compressing the macro block image by adopting a lossless compression mode. The method can well adapt to the specific data format of the macro block, and guarantees the image quality while giving consideration to the real-time performance of image coding.

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Номер записи: 2
18-04-2023 дата публикации

Lossless association coding method, system, equipment and medium

Номер: CN115988216A
Автор: YOU DEGUANG, JIAO YAN, ZHANG TIANYANG, CHEN XI, CAI YUXUAN, LIN JIAQIN, ZHU LEI
Принадлежит:

The invention provides a lossless correlation coding method, system and equipment based on intrinsic mode decomposition for a cloud desktop and a medium, adjacent frames in an image display channel in a cloud desktop scene have high correlation, and by utilizing the scene characteristic and combining the characteristics of multi-dimensional frequency and the like of a macro block sequence constructed by an intrinsic mode decomposition method, the lossless correlation coding efficiency is improved. The compression rate can be improved by greatly utilizing the associated information between the images, the data transmission quantity is effectively reduced, and the user experience in a low-bandwidth environment is improved. According to the method, the characteristics of the cloud desktop scene are utilized, and the characteristics of multidimensional frequency and the like of the macro block sequence constructed by the intrinsic mode decomposition method are combined, so that the compression ...

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Номер записи: 3
16-05-2023 дата публикации

Noise suppression method based on subspace characteristic active circulation network

Номер: CN116129923A
Автор: CAI YUXUAN, CHEN XI, LIN JIAQIN, YOU DEGUANG, ZHANG TIANYANG, JIAO YAN, ZHU LEI
Принадлежит:

The invention discloses a noise suppression method based on a subspace characteristic active circulation network, and belongs to the technical field of audio noise reduction, and the method comprises the steps: collecting audio data, carrying out the downsampling of the frequency of the audio data to 16kHz, carrying out the framing processing with the time domain length of 10ms, taking the data of 48 sampling points of each of the front and rear frames of each frame, and carrying out the subspace characteristic active circulation network; forming time domain data of which each frame comprises 256 sampling points; performing short-time Fourier transform on the multi-frame time domain data to obtain multi-frame frequency domain data; dividing each frame of frequency domain data into 16 frequency domain subspaces according to frequency, and extracting a plurality of characteristic parameters of each frequency domain subspace; constructing an active cyclic gain estimation network model; inputting ...

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Номер записи: 4