scholarly journals EACH FRAME POINT RESTORATION ERROR BASED SUPER-RESOLUTION METHOD

2021 ◽  
pp. 30-38
Author(s):  
А.И. Максимов
Keyword(s):  
Video Processing ◽  
Super Resolution ◽  
Linear Interpolation ◽  
Reconstruction Error ◽  
Geometric Transformation ◽  
The Novel ◽  
Resolution Recovery ◽  
Image Channel ◽  
Additional Image

В работе предложен метод повышения пространственного разрешения по серии кадров низкого разрешения, использующий для формирования результирующего изображения значения погрешностей восстановления в точке каждого кадра. Метод объединяет в себе результаты многолетних исследований автора в области повышения качества изображений и видеозаписей. Предложенный метод разрабатывался для решения прикладных задач криминалистической экспертизы видеозаписей и предназначен для повышения визуального качества плоского локального объекта, находящегося близко к центру кадра. Метод состоит из трех этапов. Первый этап - процедура сверхразрешающего восстановления в каждом кадре с учетом непрерывно-дискретной модели наблюдения сигнала с сохранением сведений об ошибке такого восстановления в дополнительный канал обработки изображения. Второй – геометрическое согласование восстановленных кадров с применением геометрического преобразования к дополнительному каналу обработки. Третий – взвешенное оптимальное по критерию минимизации среднеквадратической ошибки комплексирование кадров. Преимуществами предлагаемого метода являются оценка погрешности восстанавливаемого изображения в каждой точке, а также учет искажений изображений в непрерывной области. В работе проведено экспериментальное исследование ошибки восстановления предлагаемого метода, полученные результаты сравнивались со случаем, не использующим авторские находки предлагаемого метода, - усредняющим комплексированием линейно интерполированных кадров. Линейная интерполяция была взята, поскольку она также вписывается в фильтровую модель восстановления изображения на первом этапе работы метода. Полученные результаты демонстрируют превосходство предлагаемого метода. In this paper, a method for multi-frame superresolution is proposed. It exploits the values ​​of the recovery errors at the point of each frame to form the resulting high-resolution image. The method combines the results of many years of author's research in the field of image and video processing. The proposed method aims to apply to forensic tasks of video analysis. The method improves the visual quality of a flat local object located close to the center of the frame. The method consists of three stages. The first stage is the procedure of optimal super-resolution recovery of each frame with the use of the continuous-discrete observation model. During this stage, the recovery errors are stored in an additional image channel. The second stage is the frames registration. A geometric transformation is also applied to the additional channel during this stage. The final stage is the weighted optimal fusing. The advantages of the proposed method are the estimation of the error of the restored image at each point and taking into account the image degradations in the continuous domain. Experimental research of the reconstruction error of the method was carried out. The results were compared with the case that does not use the novel features of the proposed method - averaging fusing of linear interpolated frames. Linear interpolation was chosen as it also fits into the filtering model of image recovery of the method's first stage. The obtained results show that the proposed method outperforms the other one.

scholarly journals Implementasi Metode Super Resolusi Untuk Meningkatkan Kualitas Citra Hasil Screenshot

2020 ◽  
Vol 7 (3) ◽  
pp. 432
Author(s):  
Windi Astuti
Keyword(s):  
Image Processing ◽  
Image Quality ◽  
Median Filter ◽  
Super Resolution ◽  
Linear Interpolation ◽  
Resolution Method ◽  
Image Zooming ◽  
Image Enlargement ◽  
Three Stages

Various types of image processing that can be done by computers, such as improving image quality is one of the fields that is quite popular until now. Improving the quality of an image is necessary so that someone can observe the image clearly and in detail without any disturbance. An image can experience major disturbances or errors in an image such as the image of the screenshot is used as a sample. The results of the image from the screenshot have the smallest sharpness and smoothness of the image, so to get a better image is usually done enlargement of the image. After the screenshot results are obtained then, the next process is cropping the image and the image looks like there are disturbances such as visible blur and cracked. To get an enlarged image (Zooming image) by adding new pixels or points. This is done by the super resolution method, super resolution has three stages of completion, first Registration, Interpolation, and Reconstruction. For magnification done by linear interpolation and reconstruction using a median filter for image refinement. This method is expected to be able to solve the problem of improving image quality in image enlargement applications. This study discusses that the process carried out to implement image enlargement based on the super resolution method is then built by using R2013a matlab as an editor to edit programs

scholarly journals Fast and Accurate Light Field View Synthesis by Optimizing Input View Selection

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 557
Author(s):  
Xingzheng Wang ◽  
Yongqiang Zan ◽  
Senlin You ◽  
Yuanlong Deng ◽  
Lihua Li
Keyword(s):  
Spatial Resolution ◽  
Light Field ◽  
Angular Resolution ◽  
Super Resolution ◽  
Depth Estimation ◽  
View Synthesis ◽  
The Novel ◽  
Arbitrary Location ◽  
Field View

There is a trade-off between spatial resolution and angular resolution limits in light field applications; various targeted algorithms have been proposed to enhance angular resolution while ensuring high spatial resolution simultaneously, which is also called view synthesis. Among them, depth estimation-based methods can use only four corner views to reconstruct a novel view at an arbitrary location. However, depth estimation is a time-consuming process, and the quality of the reconstructed novel view is not only related to the number of the input views, but also the location of the input views. In this paper, we explore the relationship between different input view selections with the angular super-resolution reconstruction results. Different numbers and positions of input views are selected to compare the speed of super-resolution reconstruction and the quality of novel views. Experimental results show that the speed of the algorithm decreases with the increase of the input views for each novel view, and the quality of the novel view decreases with the increase of the distance from the input views. After comparison using two input views in the same line to reconstruct the novel views between them, fast and accurate light field view synthesis is achieved.

scholarly journals A method for optimal linear super-resolution image restoration

2021 ◽  
Vol 5 (45) ◽  
pp. 692-701
Author(s):  
A.I. Maksimov ◽  
V.V. Sergeyev
Keyword(s):  
General Scheme ◽  
Super Resolution ◽  
Linear Interpolation ◽  
Reconstruction Error ◽  
Observation Model ◽  
Refinement Method ◽  
Optimal Linear ◽  
Recovery Error ◽  
Image Pixels ◽  
Significant Superiority

In this paper, we propose a super-resolution (pixel grid refinement) method for digital images. It is based on the linear filtering of a zero-padded discrete signal. We introduce a continuous-discrete observation model to create a reconstruction system. The proposed observation model is typical of real-world imaging systems - an initially continuous signal first undergoes linear (dynamic) distortions and then is subjected to sampling and the effect of additive noise. The proposed method is optimal in the sense of mean square recovery error minimization. In the theoretical part of the article, a general scheme of the linear super-resolution of the signal is presented and expressions for the impulse and frequency responses of the optimal reconstruction system are derived. An expression for the error of such restoration is also derived. For the sake of brevity, the entire description is presented for one-dimensional signals, but the obtained results can easily be generalized for the case of two-dimensional images. The experimental section of the paper is devoted to the analysis of the super-resolution reconstruction error depending on the parameters of the observation model. The significant superiority of the proposed method in terms of the reconstruction error is demonstrated in comparison with linear interpolation, which is usually used to refine the grid of image pixels.

ДИАГНОСТИКА ХРОНИЧЕСКИХ ИНДУЦИРОВАННЫХ КРАПИВНИЦ

2019 ◽  
pp. 5-13
Author(s):  
E.Yu. Borzova
Keyword(s):  
Quality Of Life ◽  
Biological Therapy ◽  
Treatment Algorithm ◽  
The Novel ◽  
International Guidelines ◽  
Systemic Reactions ◽  
Significant Impairment ◽  
Challenge Tests

Хронические индуцированные крапивницы имеют важное социальноэкономическое значение вследствие риска развития системных реакций и значительного снижения качества жизни пациентов. Диагностика хронических индуцированных крапивниц основывается на анамнестических данных и проведении провокационных тестов. Современный протокол ведения больных хронической крапивницей включает применение неседативных антигистаминных препаратов. Международные согласительные документы по лечению крапивницы рекомендуют 4кратное увеличение суточной дозы неседативных антигистаминных препаратов при их неэффективности в стандартных дозах. Данные метаанализа указывают на эффективность омализумаба при хронических индуцированных крапивницах. В перспективе ожидается расширение арсенала генноинженерной биологической терапии хронических индуцированных крапивниц.Chronic inducible urticarias are characterized by the risks of systemic reactions and a significant impairment of patients quality of life. The diagnosis of chronic inducible urticarias relies on the patients history and the challenge tests. A treatment algorithm for the management of chronic inducible urticarias includes nonsedating antihistamines as a firstline treatment. The international guidelines for the management of chronic inducible urticarias recommend updosing of nonsedating antihistamines up to four fold if standard doses are not effective. The metaanalysis suggests the efficacy of omalizumab in chronic inducible urticarias. In the prospect, the novel options of biological therapy for chronic inducible urticarias are expected.

ДИАГНОСТИКА ХРОНИЧЕСКИХ ИНДУЦИРОВАННЫХ КРАПИВНИЦ

2019 ◽  
Author(s):  
E.Yu. Borzova
Keyword(s):  
Biological Therapy ◽  
Meta Analysis ◽  
Treatment Algorithm ◽  
The Novel ◽  
First Line ◽  
Systemic Reactions ◽  
Significant Impairment ◽  
Challenge Tests ◽  
First Line Treatment

Хронические индуцированные крапивницы имеют важное социально-экономическое значение вследствие риска развития системных реакций и значительного снижения качества жизни пациентов. Диагностика хронических индуцированных крапивниц основывается на анамнестических данных и проведении провокационных тестов. Современный протокол ведения больных хронической крапивницей включает применение неседативных антигистаминных препаратов. Международные согласительные документы по лечению крапивницы рекомендуют 4-кратное увеличение суточной дозы неседативных антигистаминных препаратов при их неэффективности в стандартных дозах. Данные мета-анализа указывают на эффективность омализумаба при хронических индуцированных крапивницах. В перспективе ожидается расширение арсенала генно-инженерной биологической терапии хронических индуцированных крапивниц.Chronic inducible urticarias are characterized by the risks of systemic reactions and a significant impairment of patients quality of life. The diagnosis of chronic inducible urticarias relies on the patients history and the challenge tests. A treatment algorithm for the management of chronic inducible urticarias includes nonsedating antihistamines as a first-line treatment. The international guidelines for the management of chronic inducible urticarias recommend updosing of nonsedating antihistamines up to four fold if standard doses are not effective. The meta-analysis suggests the efficacy of omalizumab in chronic inducible urticarias. In the prospect, the novel options of biological therapy for chronic inducible urticarias are expected.

scholarly journals Spatiotemporal Fusion of Formosat-2 and Landsat-8 Satellite Images: A Comparison of “Super Resolution-Then-Blend” and “Blend-Then-Super Resolution” Approaches

2021 ◽  
Vol 13 (4) ◽  
pp. 606
Author(s):  
Tee-Ann Teo ◽  
Yu-Ju Fu
Keyword(s):  
Satellite Images ◽  
Traditional Approach ◽  
Spectral Band ◽  
Super Resolution ◽  
High Temporal Resolution ◽  
Landsat 8 ◽  
Fusion Model ◽  
Image Blending ◽  
Fine Resolution

The spatiotemporal fusion technique has the advantages of generating time-series images with high-spatial and high-temporal resolution from coarse-resolution to fine-resolution images. A hybrid fusion method that integrates image blending (i.e., spatial and temporal adaptive reflectance fusion model, STARFM) and super-resolution (i.e., very deep super resolution, VDSR) techniques for the spatiotemporal fusion of 8 m Formosat-2 and 30 m Landsat-8 satellite images is proposed. Two different fusion approaches, namely Blend-then-Super-Resolution and Super-Resolution (SR)-then-Blend, were developed to improve the results of spatiotemporal fusion. The SR-then-Blend approach performs SR before image blending. The SR refines the image resampling stage on generating the same pixel-size of coarse- and fine-resolution images. The Blend-then-SR approach is aimed at refining the spatial details after image blending. Several quality indices were used to analyze the quality of the different fusion approaches. Experimental results showed that the performance of the hybrid method is slightly better than the traditional approach. Images obtained using SR-then-Blend are more similar to the real observed images compared with images acquired using Blend-then-SR. The overall mean bias of SR-then-Blend was 4% lower than Blend-then-SR, and nearly 3% improvement for overall standard deviation in SR-B. The VDSR technique reduces the systematic deviation in spectral band between Formosat-2 and Landsat-8 satellite images. The integration of STARFM and the VDSR model is useful for improving the quality of spatiotemporal fusion.

scholarly journals Identification of the State of Electrical Appliances with the Use of a Pulse Signal Generator

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 673
Author(s):  
Augustyn Wójcik ◽  
Piotr Bilski ◽  
Robert Łukaszewski ◽  
Krzysztof Dowalla ◽  
Ryszard Kowalik
Keyword(s):  
Measurement System ◽  
Cross Correlation ◽  
Pulse Signal ◽  
Signal Generator ◽  
Experimental Results ◽  
The Novel ◽  
End User ◽  
Standard Classification ◽  
Electrical Appliance

The paper presents the novel HF-GEN method for determining the characteristics of Electrical Appliance (EA) operating in the end-user environment. The method includes a measurement system that uses a pulse signal generator to improve the quality of EA identification. Its structure and the principles of operation are presented. A method for determining the characteristics of the current signals’ transients using the cross-correlation is described. Its result is the appliance signature with a set of features characterizing its state of operation. The quality of the obtained signature is evaluated in the standard classification task with the aim of identifying the particular appliance’s state based on the analysis of features by three independent algorithms. Experimental results for 15 EAs categories show the usefulness of the proposed approach.

scholarly journals Pediatric Endocrinology in the Time of COVID-19: Considerations for the Rapid Implementation of Telemedicine and Management of Pediatric Endocrine Conditions

2020 ◽  
Vol 93 (6) ◽  
pp. 343-350
Author(s):  
Molly O. Regelmann ◽  
Rushika Conroy ◽  
Evgenia Gourgari ◽  
Anshu Gupta ◽  
Ines Guttmann-Bauman ◽  
...  
Keyword(s):  
Patient Care ◽  
Care Patient ◽  
The Novel ◽  
Patient Privacy ◽  
Pediatric Endocrinology ◽  
Quality Of Patient Care ◽  
Care Outcomes ◽  
Novel Coronavirus ◽  
The Impact

<b><i>Background:</i></b> Pediatric endocrine practices had to rapidly transition to telemedicine care at the onset of the novel coronavirus disease 2019 (COVID-19) pandemic. For many, it was an abrupt introduction to providing virtual healthcare, with concerns related to quality of patient care, patient privacy, productivity, and compensation, as workflows had to change. <b><i>Summary:</i></b> The review summarizes the common adaptations for telemedicine during the pandemic with respect to the practice of pediatric endocrinology and discusses the benefits and potential barriers to telemedicine. <b><i>Key Messages:</i></b> With adjustments to practice, telemedicine has allowed providers to deliver care to their patients during the COVID-19 pandemic. The broader implementation of telemedicine in pediatric endocrinology practice has the potential for expanding patient access. Research assessing the impact of telemedicine on patient care outcomes in those with pediatric endocrinology conditions will be necessary to justify its continued use beyond the COVID-19 pandemic.

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