Nikolay Nikolaevych Ponomarenko

National Aerospace University – Kharkiv Aviation Institute · Department of Signal Reception, Transmitting and Processing

This chapter deals with lossy compression of images that have been corrupted by additive noise. The chapter's key contribution is that the analysis is done from the perspective of compressed image visual quality. Several coders are explored for which the compression ratio is regulated in various ways. Lossless coding usually does not produce suffic...

The problem of increasing efficiency of blind image quality assessment is considered. No-reference image quality metrics both independently and as components of complex image processing systems are employed in various application areas where images are the main carriers of information. Meanwhile, existing noreference metrics have a significant draw...

This work relates to the area of full-reference image visual quality assessment. The paper deals with studying the impact of image fragment non-predictivity on image perception by humans, in particular, on ability of such fragments to mask distortions. A hypothesis that the fragment masking effect depends on how difficult is it for a human to predi...

Existing full-reference metrics still do not provide a desirable degree of adequacy to a human visual perception, for evaluation of images with different types and levels of distortions. One reason for this is that it is difficult to incorporate the peculiarities of human visual system in the metrics design. In this paper, a robust approach to full...

Изображения, сжатые в соответствии со стандартом JPEG, могут подвергаться дополнительному сжатию без потерь с целью уменьшения объема данных, передаваемых по каналам связи или уменьше-ния места, занимаемого такими изображениями на носителях данных. При этом изображение час-тично декодируется до получения квантованных коэффициентов дискретного косин...

We introduce a content-adaptive approach to image denoising where the filter design is based on mean opinion scores (MOSs) from preliminary experiments with volunteers who evaluated the quality of denoised image fragments. This allows to tune the filter parameters so to improve the perceptual quality of the output image, implicitly accounting for t...

In this paper a problem of compressing data containing information on basic parameters of network traffic is considered. Twelve test sets with different types of network traffic for known monitoring tools Wireshark, Colasoft Capsa and CommView are formed. It is shown that the main part of memory in compressed data relates to timestamps. A method fo...

Task of entropy group coding of data for reduce of its statistical redundancy on base of recursive group coding is considered. Recursive group coding provides effective coding of symbols of large alphabets. It is fast and in some cases more effective alternative of such methods as arithmetical coding and Huffman coding. However applications of recu...

Various full-reference image quality metrics (indices) that take into account peculiarities of human vision system (HVS) have been proposed during last decade. Most of them have been already tested on several image databases including TID2013, a recently proposed database of distorted color images. Metrics performance is usually characterized by th...

Рассмотрена задача альтернативного кодирования квантованных коэффициентов дискретного коси-нусного преобразования (ДКП) в стандарте JPEG. Вместо цепочки из ряда операций предлагается ис-пользовать рекурсивное групповое кодирование (РГК). РГК является альтернативой арифметическо-му кодированию и кодированию Хаффмана и в отличие от них способно эффек...

In this paper a problem of compressing data containing information on basic parameters of network traffic is considered. Six test sets with different types of network traffic for known monitoring tool Wireshark are formed. Analysis of compression efficiency for these datasets by widely used archivers is carried out. It is shown that the main part o...

Images acquired and processed in communication and multimedia systems are often noisy. Thus, pre-filtering is a typical stage to remove noise. At this stage, a special attention has to be paid to image visual quality. This paper analyzes denoising efficiency from the viewpoint of visual quality improvement using metrics that take into account human...

A problem of detecting textural areas in images corrupted by noise is considered. Detection is based on joint use of several local parameters calculated in scanning windows (blocks) of different size. Trained support vector machine (SVM) classifier is used for combining local parameters. Factors that influence detector performance are analyzed. It...

In practice, acquired color images are inevitably noisy, and filtering/denoising procedure is used to suppress the noise. Although numerous denoising techniques have been proposed, they are not universally efficient in all considered practical situations. There are also contradictory requirements to color image denoising and their priority can be d...

This paper proposes a non-local modification of well-known sigma filter, Nonlocal Sigma filter (NSF), intended to suppress additive white Gaussian noise from images. Similarly to the Nonlocal Mean Filter (NLM), every output pixel value is computed as a nonlocal weighted average of pixels coming from similar patches to the patch around the current p...

Рассмотрена задача рекурсивного группового кодирования данных с целью устранения их статистической избыточности. Показано, что в ряде случаев, например, при динамическом варианте кодирования, целесообразно использовать постоянные размеры и количество групп, вместо того, чтобы вычислять их адаптивно по отношению к кодируемому тексту. Предложено неск...

The problem of how to automatically provide a desired (required) visual quality in lossy compression of still images and video frames is considered in this paper. The quality can be measured based on different conventional and visual quality metrics. In this paper, we mainly employ human visual system (HVS) based metrics PSNR-HVS-M and MSSIM since...

A task of assessing full-reference visual quality of images is considered. Correlation between the obtained array of mean opinion scores (MOS) and the corresponding array of given metric values allows characterizing correspondence of a considered metric to HVS. For the largest openly available database TID2013 intended for metric verification, a Sp...

This paper describes a recently created image database, TID2013, intended for evaluation of full-reference visual quality assessment metrics. With respect to TID2008, the new database contains a larger number (3000) of test images obtained from 25 reference images, 24 types of distortions for each reference image, and 5 levels for each type of dist...

Проведены исследования сжатия информации в системах передачи данных. Представлен метод фор-мирования тестовых данных, имеющих большой размер алфавита, что соответствует мультимедийной информации, передаваемой в современных телекоммуникационных сетях. Сформированы тестовые наборы данных с разными размерами алфавита, для которых точно можно рассчитат...

Рассмотрена задача кодирования информации с целью устранения ее статистической избыточности. Наиболее известными из методов, относящихся к этой области, являются арифметическое кодиро-вание и кодирование Хаффмана. Недостатком этих и большинства других методов является недос-таточная эффективность при кодировании символов сверхбольших алфавитов. В д...

A problem of lossless compression of a text with a large alphabet, typical for compressing multimedia information in data transmission systems, is considered. A method of forming test data sequences for a given alphabet size is proposed. It allows calculating theoretically achievable compression ratio for the generated test sequences. It is shown t...

A problem of lossless compression of a text with a large alphabet, typical for compressing multimedia information in data transmission systems, is considered. A method of forming test data sequences for a given alphabet size is proposed. It allows calculating theoretically achievable compression ratio for the generated test sequences. It is shown t...

In hyperspectral imaging, one has to deal with huge amount of data at different stages of their processing both on-board and on-land. Due to this, high degree of automation is required. The paper deals with considering new approaches and trends in design and use of methods and algorithms for automatic processing of hyperspectral data. Blind estimat...

It is shown that images can be subject to lossy compression in such a way that introduced distortions are not visible. For this purpose, two modern visual quality metrics, MSSIM and PSNR-HVS-M, can be used. Their values are to be provided not less than 0.99 and 40 dB, respectively, and the corresponding lossy compression is to be carried out. Attai...

A new database of distorted color images called TID2013 is designed and described. In opposite to its predecessor, TID2008, this database contains images with five levels of distortions instead of four used earlier and a larger number of distortion types (24 instead of 17). The need for these modifications is motivated and new types of distortions...

Compression of images corrupted by multiplicative noise is characterized by some specific features. First, lossy image compression is preferable since lossless coding is ineffective. Second, in case of lossy compression, quality of a compressed noisy image evaluated with respect to noise-free one can become better than the corresponding quality of...

Lossy compression of images corrupted by mixed Poisson and additive Gaussian noise is considered. Peculiarities of noise filtering effects observed for two approaches to image compression are studied. This is first done for specially created artificial image and, then, for two standard test images. It is shown that the standard (direct) approach to...

Visual quality of color images is an important aspect in various applications of digital image processing and multimedia. A large number of visual quality metrics (indices) has been proposed recently. In order to assess their reliability, several databases of color images with various sets of distortions have been exploited. Here we present a new d...

The paper presents two approaches to adaptive JPEG-based compression of color images inside digital cameras. Compression for both approaches, although lossy, is organized in such a manner that introduced distortions are not visible. This is done taking into account quality of each original image before it is subject to lossy compression. Noise char...

Approaches to automation of lossy image compression providing a required visual quality according to a chosen visual quality metric are discussed. As examples, the HVS-metrics PSNR-HVS-M and MSSIM that take peculiarities of human visual system (HVS) into account are considered. Iterative image compression procedures are analyzed for a large number...

A new database of distorted color images called TID2013 is designed and described. In opposite to its predecessor, TID2008, this database contains images with five levels of distortions instead of four used earlier and a larger number of distortion types (24 instead of 17). The need for these modifications is motivated and new types of distortions...

Various strategies of compression of single‐look SAR images corrupted by spatially correlated speckle noise are considered in this paper. Several quantitative criteria including visual quality metrics are taken into account to provide thorough investigation of compression characteristics. Typical practical restrictions are taken into account depend...

Предложен метод оценивания эффективности различных методов детектирования границ на РСА-изображениях. Подтверждено повышение точности работы детекторов границ при использовании предварительной обработки изображения. Продемонстрирована эффективность применения данного метода для оптимизации параметров элементарных детекторов границ, формирующих вход...

Рассмотрен автоматический метод сжатия с потерями гиперспектральных изображений системы E01/Hyperion с применением к исходным данным вариационно-стабилизирующего обобщенного преоб-разования Энскомба (ОПЭ) на основе полученных оценок сигнально-зависимой и аддитивной гауссов-ской компонент шума. В результате применения ОПЭ шум сложной структуры преоб...

Рассмотрена задача верификации метрик визуального качества изображений на основе специализиро-ванных баз данных. Эффективность такой верификации во многом зависит от методики формирова-ния базы тестовых изображений и проведения экспериментов по получению усредненных экспертных оценок. В работе предлагается математическая модель принятия решений уча...

Рассмотрен автоматический метод сжатия с потерями гиперспектральных изображений системы E01/Hyperion с применением к исходным данным вариационно-стабилизирующего обобщенного преобразования Энскомба (ОПЭ) на основе полученных оценок сигнально-зависимой и аддитивной гауссовской компонент шума. В результате применения ОПЭ шум сложной структуры преобра...

Open acces: http://www.intechopen.com/books/remote-sensing-advanced-techniques-and-platforms/classification-of-pre-filtered-multichanel-rs-images

In many applications, it is desirable to provide visually lossless (but, in fact, lossy) compression of still images. This can be done using modern visual quality metrics and iterative image compression/decompression procedure for setting a proper parameter of a coder for a given image. Performance of such a procedure is analyzed for a wide set of...

Проанализирована эффективность фильтрации одновзглядовых РСА-изображений в предположении, что они искажены спекл-шумом с явно выраженной пространственной коррелированностью. Исследование проведено для фильтров на основе дискретного косинусного преобразования (ДКП), способных легко учитывать априорную информацию о пространственном спектре помех и их...

Рассмотрены возможности повышения качества декомпрессированных изображений, сжатых кодерами на основе дискретного косинусного преобразования, путем деблокинга. Для оценки качества использованы как стандартная метрика PSNR, так и метрики, учитывающие аспекты визуального восприятия человеком. Показано, что пост-обработка (деблокинг) может выполняться...

A task of visually lossless but, in fact, lossy compression of synthetic aperture radar (SAR) images corrupted by intensive speckle is considered. A method based on discrete cosine transform (DCT) applied in 8×8 blocks is proposed. The method is adapted to spatial DCT spectrum of speckle and its multiplicative nature. It is shown that the proposed...

Image filtering is applied in numerous applications. Although most images after processing are subject to visualization and analysis by humans, MSE and PSNR metrics that do not adequately characterize image visual quality are still basically used in filter design and performance comparisons. This paper presents and generalizes some recent results o...

In this paper, we present a novel approach to image quality metric taking into account degradation of contrast and brightness as well as block similarity. The metric is achieved by performing of the following steps: 1) reducing contrast and brightness in distorted image, 2) using block-matching (BM) to group similar 2D image fragments into 3D data...

The application of hyperspectral imaging to detect soil contaminations is considered with respect to contamination assessment within urban areas. An optimal selection of hyperspectral imagery spectral bands is proposed. There is no reason to process all spectral bands as usually the 10–30 most informative ones are sufficient. A new criterion is int...

Graphical information as color images is widely used in CAD and telecommunication systems. Several factors can contribute to impair the quality of an i