Anomaly detection in compressed H.264/AVC video

Real time anomaly detection is the need of the hour for any security applications. In this article, we have proposed a real time anomaly detection for H.264 compressed video streams utilizing pre-encoded motion vectors (MVs). The proposed work is principally motivated by the observation that MVs have distinct characteristics during anomaly than usual. Our observation shows that H.264 MV magnitude and orientation contain relevant information which can be used to model the usual behavior (UB) effectively. This is subsequently extended to detect abnormality/anomaly based on the probability of occurrence of a behavior. The performance of the proposed algorithm was evaluated and bench-marked on UMN and Ped anomaly detection video datasets, with a detection rate of 70 frames per sec resulting in 90x and 250x speedup, along with on-par detection accuracy compared to the state-of-the-art algorithms.

A survey on compressed domain video analysis techniques

Image and video analysis requires rich features that can characterize various aspects of visual information. These rich features are typically extracted from the pixel values of the images and videos, which require huge amount of computation and seldom useful for real-time analysis. On the contrary, the compressed domain analysis offers relevant information pertaining to the visual content in the form of transform coefficients, motion vectors, quantization steps, coded block patterns with minimal computational burden. The quantum of work done in compressed domain is relatively much less compared to pixel domain. This paper aims to survey various video analysis efforts published during the last decade across the spectrum of video compression standards. In this survey, we have included only the analysis part, excluding the processing aspect of compressed domain. This analysis spans through various computer vision applications such as moving object segmentation, human action recognition, indexing, retrieval, face detection, video classification and object tracking in compressed videos.

Dealing with Energy-QoE Trade-Offs in Mobile Video

Scalable video coding allows an efficient provision of video services at different quality levels with different energy demands. According to the specific type of service and network scenario, end users and/or operators may decide to choose among different energy versus quality combinations. In order to deal with the resulting trade-off, in this paper we analyze the number of video layers that are worth to be received taking into account the energy constraints. A single-objective optimization is proposed based on dynamically selecting the number of layers, which is able to minimize the energy consumption with the constraint of a minimal quality threshold to be reached. However, this approach cannot reflect the fact that the same increment of energy consumption may result in different increments of visual quality. Thus, a multiobjective optimization is proposed and a utility function is defined in order to weight the energy consumption and the visual quality criteria. Finally, since the optimization solving mechanism is computationally expensive to be implemented in mobile devices, a heuristic algorithm is proposed. This way, significant energy consumption reduction will be achieved while keeping reasonable quality levels.

Diário da Constituinte [gravação de video] : [programa n. 069]

A Comissão da Organização dos Poderes e Sistema de Governo discute duas questões de ordem. Na primeira o deputado Amaral Netto (PDS-RJ)propõe a substituição dos relatores que tiveram os anteprojetos rejeitados e na segunda o deputado José Genoíno (PT-SP) quer mudar a composição da Comissão de Sistematização. A Comissão da Organização Eleitoral, Partidária e Garantia das Instituições discutiu duas questões que passaram por mais de uma subcomissão, e tiveram propostas diferentes, como o mandato presidencial, por exemplo. a Subcomissão do Poder executidvo proôs cinco anos, mas a Subcomissão do Sistema Eleitora sugeriu quatro. O deputados Paulo Delgado (PT-SP) diz que esta é uma questão política, e deve ser debatida com serenidade. Quarenta dias de trabalho sem interrupção, várias seções e audiências públicas e três viagens a regiões com conflito agrário, este o balanço dos trabalhos da Subcomissão da Política Agrícola e Fundiária e da Reforma Agrária. No resultado final houveram muitas divergências. O parecer do relator Oswaldo Lima Filho (PMDB-PE) foi preterido por um substitutivo, do deputado Rosa Prata (PMDB-MG), o que foi considerado irregular pelo Regimento Interno. Oswaldo Lima Filho (PMDB-PE) diz que o substitutivo é uma fraude. Já o deputado Rosa Prata (PMDB-MG) diz que é uma proposta menos radical e ajustada a realidade do país. Outro tema a ser discutido é o tamanho da propriedade rural. Os deputados Amaury Muller (PDT-RS) e Fernando Sant'Anna (PCB-BA) são a favor da limitação da propriedade. Ivo Vanderlinde (PMDB-SC) acredita no entendimento, para fazer da Reforma Agrária, uma realidade.

Case study: Video learning for engineering apprentices

Case study on level 2 and 3 engineering apprentices at PETA training and consultancy services.