Graph Spectral Image Processing

Recent advent of graph signal processing (GSP) has spurred intensive studies of signals that live naturally on irregular data kernels described by graphs (e.g., social networks, wireless sensor networks). Though a digital image contains pixels that reside on a regularly sampled 2D grid, if one can design an appropriate underlying graph connecting pixels with weights that reflect the image structure, then one can interpret the image (or image patch) as a signal on a graph, and apply GSP tools for processing and analysis of the signal in graph spectral domain. In this article, we overview recent graph spectral techniques in GSP specifically for image / video processing. The topics covered include image compression, image restoration, image filtering and image segmentation

VLSI architectures of a wiener filter for video coding

In the modern age, the use of video has become fundamental in communication and this has led to its use through an increasing number of devices. The higher resolution required for images and videos leads to more memory space and more efficient data compression, obtained by improving video coding techniques. For this reason, the Alliance for Open Media (AOMedia) developed a new open-source and royalty-free codec, named AOMedia Video 1 (AV1). This work focuses on the Wiener filter, a specific loop restoration tool of the AV1 video coding format, which features a significant amount of computational complexity. A new hardware architecture implementing the separable symmetric normalized Wiener filter is presented. Furthermore, the paper details possible optimizations starting from the basic architecture. These optimizations allow the Wiener filter to achieve a 100× reduction in processing time, compared to existing works, and 5× improvement in megasamples per second

Electronic Imaging & the Visual Arts. EVA 2012 Florence

The key aim of this Event is to provide a forum for the user, supplier and scientific research communities to meet and exchange experiences, ideas and plans in the wide area of Culture & Technology. Participants receive up to date news on new EC and international arts computing & telecommunications initiatives as well as on Projects in the visual arts field, in archaeology and history. Working Groups and new Projects are promoted. Scientific and technical demonstrations are presented

Livrable D4.2 of the PERSEE project : Représentation et codage 3D - Rapport intermédiaire - Définitions des softs et architecture

51Livrable D4.2 du projet ANR PERSEECe rapport a été réalisé dans le cadre du projet ANR PERSEE (n° ANR-09-BLAN-0170). Exactement il correspond au livrable D4.2 du projet. Son titre : Représentation et codage 3D - Rapport intermédiaire - Définitions des softs et architectur

Hierarchical-p reference picture selection based error resilient video coding framework for high efficiency video coding transmission applications

In this paper, a new reference picture selection (RPS) is proposed for a high efficiency video coding (HEVC) framework. In recent studies, HEVC has been shown to be sensitive to packet error which is unavoidable in transmission applications especially for wireless networks. RPS is an effective error resilient technique for video transmission systems where a feedback channel with short round trip delay time is available. However, its procedure cannot directly apply to the HEVC framework and thus this paper expands it. In RPS, error propagation can still happen during round trip delay time. To alleviate the effect of error propagation for better quality, the proposed algorithm considers both the RPS technique and the region-based intra mode selection method by using some novel features of HEVC. Experimental results demonstrate that the proposed method outperforms the hierarchical-P RPS algorithm in terms of PSNR and other metrics. The average PSNR improvement of the proposed algorithm over the reference algorithm under 10% packet error rate is 1.56 dB for 1080p sequences, 2.32 dB for 720p sequences and 1.01 dB for wide video graphics array (WVGA) sequences, respectively. The performance of proposed method is also tested for applications where feedback information is not available. The proposed method shows noticeable improvement for video sequences that contain low or moderate level of motions

3D coding tools final report

Livrable D4.3 du projet ANR PERSEECe rapport a été réalisé dans le cadre du projet ANR PERSEE (n° ANR-09-BLAN-0170). Exactement il correspond au livrable D4.3 du projet. Son titre : 3D coding tools final repor

China: Rule-taker or Rule-maker in the International Intellectual Property System?

Intellectual property has been a crucial issue for China in the past four decades. Internationally, it was central to China’s fifteen-year negotiation on its accession to the WTO and has been a priority in China-US bilateral relations. Domestically, changes in the regulation and use of intellectual property reflect a larger picture of rapid economic and social transition in China. Initially, China was a rule-taker in intellectual property, experiencing pressure from abroad to do much more on intellectual property. In response, China enacted comprehensive domestic intellectual property laws. From 2001, the Chinese Trademark Office was registering more trademarks than any other office in the world and from 2011, the State Intellectual Property Office of China (SIPO) became the world's largest patent office. Today the Chinese government promotes intellectual property protection in its national strategy of “innovation-driven development” and seeks to transform China into the world’s leading intellectual property power. This thesis focuses on whether the large-scale deployment of intellectual property by China in various markets means that it has become a regulatory power in intellectual property, in the sense of being an agenda setter and source of global influence over IP rules. The UK in the nineteenth century and the US in the twentieth were regulatory IP powers in this sense. China’s regulatory and international influence over IP rules is tracked empirically through case studies on geographical indications (Chapter 3), the disclosure obligation (Chapter 4), and intellectual property and standardization (Chapter 5), along with an examination of China’s international IP engagement at the bilateral level (Chapter 6) and plurilateral and multilateral levels (Chapter 7). This thesis also analyses the roles of sub-state actors and non-state actors in China’s international intellectual property engagement (Chapter 8). This thesis argues that China’s role in international intellectual property regulation is more nuanced and complicated than a binary categorization of “rule-maker” or “rule-taker”. China’s international IP engagement is guided by a group of key principles, specifically the principles of IP instrumentalism and a set of foreign policy principles. These principles have been implemented through a process of modeling, while potential conflicts have been minimized through a strategy of balancing. The effects of modeling are compliance and institutional isomorphism which makes the Chinese IP system similar to those of developed countries. Balancing leads to constructed inconsistency and has led China into keeping a low-profile in international policy debates on intellectual property