Estimação de Movimento com Uso de Sequências de Baixa Discrepância para Compressão de Vídeo
DOI:
https://doi.org/10.5540/tema.2011.012.03.0211Abstract
Em processamento de vídeo, um problema relevante é a estimação de movimento, visto que corresponde a aproximadamente 80% da complexidade computacional dos sistemas de codificação de vídeo. Parte desta complexidade diz respeito a medida de similaridade usada no casamento de blocos. Neste artigo, ao invés de usar uma medida que avalia todos os pixels dentro do bloco, usa-se uma que seleciona um subconjunto destes pixels induzida pelas sequências de baixa discrepância. O método proposto é aplicado ao algoritmo de busca em três passos (TSS) tradicionalmente usado como técnica de estimação de movimento em aplicações de vídeo a uma baixa taxa de transferência. Os resultados mostram uma redução da complexidade computacional do TSS em 90% com pouca degradação do quadro recuperado.References
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