Applications of Digital Image Processing XLV最新文献_第2页

CLASSROOM: synthetic high dynamic range light field dataset 教室:合成高动态范围光场数据集

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2633615

Mary Guindy, V. K. Adhikarla, P. A. Kara, T. Balogh, Anikó Simon

{"title":"CLASSROOM: synthetic high dynamic range light field dataset","authors":"Mary Guindy, V. K. Adhikarla, P. A. Kara, T. Balogh, Anikó Simon","doi":"10.1117/12.2633615","DOIUrl":"https://doi.org/10.1117/12.2633615","url":null,"abstract":"Light field images provide tremendous amounts of visual information regarding the represented scenes, as they describe the light traversing in all directions for all the points of 3D space. Due to the recent technological advancements of light field visualization and its increasing relevance in research, the need for light field image datasets has risen significantly. Among the applications for which light field datasets are considered, high dynamic range light field image reconstruction has gained notable attention in the past years. When capturing a scene, either a single camera with a 2D microlense array or a 2D array of cameras is used to produce narrow- and wide-baseline light field images, respectively. Additionally, the turn-table methodology may be used as well for narrow-baseline light fields. While the majority of these methods enables the creation of plausible and reliable light field image datasets, such baseline-specific setups can be extremely expensive and may require immense computing resources for proper calibration. Furthermore, the resulting light field is commonly limited with regard to angular resolution. A suitable alternative to produce a light field dataset is to do it synthetically by rendering light field images, which may easily overcome the aforementioned issues. In this paper, we discuss our work on creating the “CLASSROOM” light field image dataset, depicting a classroom scene. The content is rendered in horizontal-only parallax and full parallax as well. The scene contains a high variety of light distribution, particularly involving under-exposed and over-exposed regions, which are essential to HDR image applications.","PeriodicalId":330866,"journal":{"name":"Applications of Digital Image Processing XLV","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130102635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

FPGA synthesis of original chaotic system with application in imagen transmission 原始混沌系统的FPGA合成及其在图像传输中的应用

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2633257

R. Herrera-Charles, T. Álvarez-Sánchez, J. Álvarez-Cedillo

引用次数: 0

Benchmarking and analysis of AV1 software decoding on Android devices AV1软件解码在Android设备上的测试与分析

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2633692

Janne Grunnau, Jean-Baptiste Kempf, Martin Storsjo, Jeevanantham Arumugam, K. Patankar, Mukund Srinivasan, Ronald Bultje, Henrik Gramner, Luc N. Trudeau, Victorien Le Couviour Tuffet, Zhijun Lei, I. Katsavounidis, D. Ronca

引用次数: 0

Enhancing SVT-AV1 with LCEVC to improve quality-cycles trade-offs and enhance sustainability of VOD transcoding 利用LCEVC增强SVT-AV1，改善质量周期权衡，增强VOD转码的可持续性

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2633882

Guendalina Cobianchi, G. Meardi, Stergios Poularakis, Alexei Walisiewicz, Omran Abdelkafi, F. Ben Amara, F. Kossentini, Cosmin Stejerean, Hassene Tmar

{"title":"Enhancing SVT-AV1 with LCEVC to improve quality-cycles trade-offs and enhance sustainability of VOD transcoding","authors":"Guendalina Cobianchi, G. Meardi, Stergios Poularakis, Alexei Walisiewicz, Omran Abdelkafi, F. Ben Amara, F. Kossentini, Cosmin Stejerean, Hassene Tmar","doi":"10.1117/12.2633882","DOIUrl":"https://doi.org/10.1117/12.2633882","url":null,"abstract":"The trade-offs between compression performance and encoding complexity are key in software video encoding, even more so with increasing pressure on sustainability. Previous work “Towards much better SVT-AV1 quality-cycles tradeoffs for VOD applications” [1] described three approaches of evaluating compression efficiency vs cycles trade-offs within a convex-hull framework using the Dynamic Optimizer (DO) algorithm developed in [2] [3] for VOD applications. In parallel, the new video codec enhancer LCEVC (Low Complexity Enhancement Video Coding) [4], designed to provide gains in speed-quality trade-offs, has recently been standardized as MPEG-5 Part 2. The core idea of LCEVC is to use any video coding standard (such as AV1) as a base encoder at a lower resolution, and then reduce artifacts and reconstruct a full resolution output by combining the decoded low-resolution output with up to two low-complexity reconstruction enhancement sub-layers of the residual data. This paper starts by applying LCEVC to SVT-AV1 [5], as well as x264 [6] and x265 [7], while using two of the approaches presented in [1] to evaluate the resulting compression efficiency vs cycles trade-offs. The paper then discusses the benefits of LCEVC towards higher playback speed and lower battery power consumption when using AV1 software decoding. Results show that, with fast-encoding parameter selection using the discrete convex hull methodology, LCEVC improves the quality-cycles trade-offs for all the tested codecs and across the full complexity range. In the case of SVT-AV1, LCEVC yields a ~40% reduction in computations while achieving the same quality levels according to VMAF_NEG [8]. LCEVC also enlarges the set of mobile devices capable of playing HD as well as high-frame-rate content encoded with AV1 and extends mobile battery life by up to 50% with respect to state-of-the-art AV1 software decoding.","PeriodicalId":330866,"journal":{"name":"Applications of Digital Image Processing XLV","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128976285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

H.264 or H.265 for lossy surveillance video transmission: a database study H.264或H.265的有损监控视频传输:数据库研究

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2633819

P. Topiwala, W. Dai

引用次数: 0

Joint backward and forward temporal masking for perceptually optimized x265-based video coding 基于感知优化的x265视频编码的联合向后和向前时间掩蔽

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2624774

D. Grois, A. Giladi, Praveen Kumar Karadugattu, Niranjan Balasubramanian

引用次数: 0

Noise removal of thermal images using deep learning approach 基于深度学习方法的热图像去噪

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2637042

Ahmet Çapci, H. E. Güven, B. U. Töreyin

引用次数: 0

Effective know-your-customer method for secure and trustworthy non-fungible tokens in media assets 有效的了解您的客户方法，在媒体资产中安全可靠的不可替代令牌

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2636679

Clément Sanh, K. Homayounfar, T. Ebrahimi

引用次数: 0

Private key and password protection by steganographic image encryption 隐写图像加密的私钥和密码保护

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2632631

Debesh Choudhury, S. Chakraborty

引用次数: 0

A study on flexible block partitioning for future video coding standards 面向未来视频编码标准的柔性块划分研究

Applications of Digital Image Processing XLV Pub Date : 2022-10-03 DOI: 10.1117/12.2633001

F. Urban, Karam Naser, Franck Galpin, Tangi Poirier

引用次数: 0