Detection of Noise in Digital Images by Using the Averaging Filter Name COV

Kowalski, J.; Pęksiński, Jakub; Mikołajczak, G.

doi:10.1007/978-3-642-36543-0_1

Cited by 7 publications

(2 citation statements)

References 9 publications

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“…Methods based on signal smoothing [21]- [27] are proposed for noise variance estimation. This means that the elements of a series (data set) with an irregular diagram will be replaced by a set with a smoother diagram with suppressed interference.…”

Section: Q Parameter Estimation Using Digital Smoothing Filtersmentioning

confidence: 99%

Estimation of BER Bit Error Rate Using Digital Smoothing Filters

Pęksiński

Zegliñski

Mikołajczak

et al. 2021

ELEKTRON ELEKTROTECH

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In the article, the authors present a new method of numerical determination of Q and BER parameters based on which the quality of transmission in optical fibre transmission systems is determined. The proposed method is based on the use of digital smoothing filters algorithms and does not require the knowledge of the so-called “eye diagram”, which greatly simplifies the entire measurement procedure. This method can be implemented in a simple manner in real-time systems, and in particular it is crucial for ICT systems and networks with a high bit rate of more than 10 Gbps and 40 Gbps and systems with time division or wavelength division multiplexing of 100 GBE and 400 GBE.

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Section: Q Parameter Estimation Using Digital Smoothing Filtersmentioning

confidence: 99%

Estimation of BER Bit Error Rate Using Digital Smoothing Filters

Pęksiński

Zegliñski

Mikołajczak

et al. 2021

ELEKTRON ELEKTROTECH

Self Cite

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“…Але основним недоліком переважної більшості існуючих методів є їх орієнтованість на конкретну (конкретні) збурну дію (дії), відповідно до особливостей якої будуються і їх математичні базиси. Так метод, запропонований в [10], налаштований на виявлення штучного підвищення різкості ЦЗ, методи [11,12] -на результати розмиття ЦЗ чи його частини; розробка, запропонована в [13], розрахована на виявлення зміни яскравості; методи [14,15] виявляють накладання шуму.…”

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Investigation of the Properties of the Coefficients of the Discrete Cosine Transformation as the Basis of the Method of Detection of Digital Image Integrity Violation

Кобозева¹,

Maevsky²,

Simonova³

2022

mcm-tech

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One of the most common representations of information today are digi-tal images, unauthorized changes of which can lead to negative conse-quences for an individual, institution, firm, and the state as a whole, which makes the detection of digital image integrity violation one of the most ur-gent tasks of information security. The main drawback of the existing ex-pert methods is their focus on detecting the results of a specific disruptive action, but in practice the expert often does not have information about the specifics of an attack on a digital image, while his set of tools is always limited, which can lead to a situation where the investigated digital image is erroneously recognized as original. The first «defense line» here should be methods that are effective regardless of the type of disruptiveaction, i.e. universal. At present, there are a very small number of such methods in open sources; most of them are not free from shortcomings, the main of which is a significant decrease in efficiency in conditions of minor disturb-ances. The aim of the paper is to develop a theoretical basis for an effective universal method of detection of digital image integrity violation, in par-ticular, in conditions of minor disturbances. In the course of achieving the aim of the paper: the justified expediency of using a block approach when organizing an examination of the integrity of a digital image; the area of discrete cosine transformation (DCP) of the block is chosen as the area of examination; justified selection of specific DCP coefficients for organizing the detection of violations of the integrity of digital images, the values of which do not depend on the value of the quality coefficient used when ob-taining the original image, as well as on the specific type of digital images; the difference in the nature ofchanges in the selected formal parameters during re-saving of lossy digital images, depending on whether it is origi-nal or non-original, is investigated. The obtained results of theoretical stud-ies, which are confirmed by the results of computational experiments, con-stitute the theoretical basis for the development of an effective universal method of examination of the integrity of digital images, in particular, in conditions of minor disturbances.

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