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3 results on '"Serhii Sidchenko"'

1. Video images compression method based on floating positional coding with an unequal codograms length

Author

Vladimir Barannik, Serhii Sidchenko, Dmitriy Barannik, Andrii Yermachenkov, Maksym Savchuk, and Gennady Pris

Subjects
authenticity, compression, confidentiality, encoding, encryption, image, lossless, video, Computer engineering. Computer hardware, TK7885-7895, Electronic computers. Computer science, QA75.5-76.95
Abstract

The subject of research in the article are the video images compression and encryption processes during the critically important objects managing process. The goal is to develop a method for compressing video images based on floating positional coding with an uneven codegrams length to simultaneously ensure information reliability and confidentiality during its transmission with a given time delay. Objectives: analyzing existing approaches to ensuring the video images confidentiality; development a method for compressing video images based on floating positional coding with an uneven codegrams length; evaluate the developed method effectiveness. The methods used are: digital image processing methods, digital image compression methods, image encryption and scrambling methods, structural-combinatorial coding methods, statistical analysis methods. The following results are obtained. The technology of floating encoding of an uneven sequence of blocks is proposed. Code values are formed from elements of different video image blocks. For this, a scheme for linearizing an image point coordinates from its four-dimensional representation on a plane into a one-dimensional element coordinate in a vector has been developed. The four-dimensional element coordinate on the plane describes the image block coordinates and the coordinates of the element in this block. Code values are formed under conditions of control their binary representation's length. At the same time, coding is implemented for an indeterminate number of video image elements. The number of elements depends on the length of the code word. Accordingly, codegrams with an indeterminate length are formed. Their length depends on the service data values, generated during the encoding process. Service data acts as a key element. Conclusions. The one-stage polyadic image encoding method in a differentiated basis has been further improved. The developed encoding method provides image compression without information quality loss. The original images volume compression provides by 3–20 % better compared to the TIFF data presentation format and by 4–15 % compared to the PNG format. The overhead amount is less than 2.5 % of the entire codestream size.

Published
2023
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2. Разработка концептуального метода формирования криптокомпрессионных кодограмм изображений без потери качества информации

Author

Vladimir Barannik, Serhii Sidchenko, Dmitriy Barannik, Sergii Shulgin, Valeriy Barannik, and Anton Datsun

Subjects
служебная составляющая, кодирование, защита информации, T1-995, Industry, плавающая схема, HD2321-4730.9, криптокомпрессия, Technology (General), дифференцированный базис
Abstract

Наряду с повсеместным использованием цифровых изображений возникла актуальная научно-прикладная проблема относительно необходимости снижения объемов видеоинформации при условии обеспечения ее конфиденциальности и достоверности. Для решения проблемы могут применяться методы криптокомпрессионного кодирования. Однако метода, обобщающего все этапы обработки, не описано. Разработан концептуальный метод криптокомпрессионного кодирования изображений в дифференцированном базисе без потери качества информации. Он организует трехкаскадную технологию формирования криптокомпрессионных кодограмм. На первых двух каскадах обеспечивается формирование кодовых конструкций информационных составляющих с одновременным обеспечением их конфиденциальности и ключевых элементов в качестве служебной составляющей. На третьем каскаде обработки предлагается организовать обеспечение конфиденциальности служебной составляющей. Формирование кодовых значений информационных составляющих недетерминированной длины осуществляется на основе недетерминированного количества элементов исходных видеоданных в пониженном динамическом диапазоне. Формирование служебных данных предлагается организовывать в блоках исходных изображений размерностью 16×16 элементов. Метод обеспечивает уменьшение объема исходных изображений при формировании криптокомпрессионных кодограмм в 1,14–1,58 раза (на 12–37 %) в зависимости от степени их насыщенности. Это на 12,7–23,4 % лучше технологии TIFF и на 9,6–17,9 % лучше технологии PNG. Объем служебной составляющей криптокомпрессионных кодограмм составляет 1,563 % от объема исходных видеоданных или не более 2,5 % от всего кодового потока. Это позволяет сократить объем данных для шифрования до 40 раз по сравнению с технологиями TIFF и PNG. Разработанный метод не вносит ошибок в данные в процессе кодирования и относится к методам без потери качества информации

Published
2021

3. Development of the method for encoding service data in cryptocompression image representation systems

Author

Vladimir Barannik, Natalia Barannik, Serhii Sidchenko, and Valeriy Barannik

Subjects
Computer science, Energy Engineering and Power Technology, service component, Industrial and Manufacturing Engineering, cryptocompression, Information protection policy, Reduction (complexity), information protection, Linearization, Management of Technology and Innovation, Encoding (memory), Code (cryptography), T1-995, Industry, image, Electrical and Electronic Engineering, Representation (mathematics), Technology (General), floating scheme, differentiated basis, Applied Mathematics, Mechanical Engineering, HD2321-4730.9, Computer Science Applications, Transformation (function), Control and Systems Engineering, Algorithm, Volume (compression)
Abstract

The demand for image confidentiality is constantly growing. At the same time, ensuring the confidentiality of video information must be organized subject to ensuring its reliability with a given time delay in processing and transmission. Methods of cryptocompression representation of images can be used to solve this problem. They are designed to simultaneously provide compression and protection of video information. The service component is used as the key of the cryptocompression transformation. However, it has a significant volume. It is 25% of the original video data volume. A method for coding systems of service components in a differentiated basis on the second cascade of cryptocompression representation of images has been developed. The method is based on the developed scheme of data linearization from three-dimensional coordinates of representation in a two-dimensional matrix into a one-dimensional coordinate for one-to-one representation of this element in a vector. Linearization is organized horizontally line by line. On the basis of the developed method, a non-deterministic number of code values of information components is formed. They have non-deterministic lengths and are formed on a non-deterministic number of elements. The uncertainty of positioning of cryptocompression codograms in the general code stream is provided, which virtually eliminates the possibility of their unauthorized decryption. The method provides a reduction in the volume of the service component of the cryptocompression codogram. The service data volume is 6.25% of the original video data volume. The method provides an additional reduction in the volume of cryptocompression representation of images without loss of information quality relative to the original video data on average from 1.08 to 1.54times, depending on the degree of their saturation

Published
2021

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