Results 1 to 10 of about 47,227 (224)

A New Approach of Image Denoising Based on Adaptive Multi-Resolution Technique

open access: yesNigerian Journal of Technological Development, 2022
Medical imaging and diagnostic techniques have become popular over the last two decades with the advancement of data science, data analysis, data storage, and the internet.
Lalit Mohan Satapathy, Pranati Das
doaj  

Impact of H.264/AVC and H.265/HEVC Compression Standards on the Video Quality for 4K Resolution

open access: yesAdvances in Electrical and Electronic Engineering, 2014
This article deals with the impact of H.264/AVC and H.265/HEVC compression standards on the video quality for 4K resolution. In the first part a short characteristic of both compression standards is written.
Miroslav Uhrina   +3 more
doaj   +1 more source

The fidelity of compressed and interpolated medical images

open access: yesTechnical Transactions, 2020
Due to the amount of medical image data being produced and transferred over networks, employing lossy compression has been accepted by worldwide regulatory bodies. As expected, increasing the degree of compression leads to decreasing image fidelity.
Urbaniak Ilona Anna, Wolter Marcin
doaj   +1 more source

Application of a Radar Echo Extrapolation‐Based Deep Learning Method in Strong Convection Nowcasting

open access: yesEarth and Space Science, 2021
Strong convection nowcasting has been gaining importance in operational weather forecasting. Recently, deep learning methods have been used to meet the increasing requirement for precise and timely nowcasting. One of the promising deep learning models is
Jian Yin, Zhiqiu Gao, Wei Han
doaj   +1 more source

CW-SSIM based image classification [PDF]

open access: yes2011 18th IEEE International Conference on Image Processing, 2011
Complex wavelet structural similarity (CW-SSIM) index has been proposed as a promising image similarity measure that is robust to small geometric distortions such as translation, scaling and rotation of images, but how to make the best use of it in image classification problems has not been deeply investigated.
Yang Gao, Abdul Rehman, Zhou Wang
openaire   +1 more source

Research on Huffman algorithm based on PCA and SPIHT for image compression(基于主成分分析和分层树集合划分的Huffman算法图像压缩研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2018
互联网的飞速发展,产生了大量的图像信息.为了减少图片占用的存储空间,提高图像质量,提出了一种将主成分分析(PCA)和分层树集合划分(SPIHT)压缩算法相结合的有损图像压缩算法.首先对图像进行主成分分解,选取主要特征值进行压缩,再利用SPIHT算法将图像分解成不同子带的小波系数进行压缩,对SPIHT压缩系数进行哈夫曼编码,实现图像二级压缩.将本文提出的算法与SPIHT、SPIHT的哈夫曼编码、JEPG2000、PCA压缩算法进行了比较,结果表明本算法较其他压缩算法具有更好的性能 ...
FANGXiansu(方炫苏)   +2 more
doaj   +1 more source

Comparing Simulation Model for Objective QoE Video Evaluation with real IPTV Test Scenario During Appearance of Packet Losses

open access: yesTelfor Journal, 2020
The aim of this article is to explain benefits of the simulation model for objective QoE (Quality of Experience) video evaluation in order to find similarities with real IPTV (Internet Protocol TeleVision) system distribution in a DSL (Digital Subscriber
N. Goran, A. Begović, N. Škaljo
doaj   +1 more source

A Combination of SHA-256 and DES for Visual Data Protection

open access: yesJurnal Masyarakat Informatika
This study employs SHA-256 and DES algorithms to safeguard visual data through encryption and decryption processes. Research findings demonstrate that this method provides robust security with image histograms that are difficult to recognize and randomly
Aristides Bima Wintaka   +3 more
doaj   +1 more source

Simulation of Scour at Bridge Supports

open access: yesGrađevinar, 2020
Groups of piers are used on bridges to minimise scour around bridge supports. The prediction of scour around piers due to interaction of vortices around bridge piers is more complex compared to scour prediction around a single pier.
Yasser Moussa, Mahoud Atta
doaj   +1 more source

Merger as Intermittent Accretion

open access: yes, 2008
The Self-Similar Secondary Infall Model (SSIM) is modified to simulate a merger event. The model encompass spherical versions of tidal stripping and dynamical friction that agrees with the Syer & White merger paradigm's behaviour.
Ascasibar   +27 more
core   +2 more sources

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