publications: - title: "Data-Driven Motion Estimation with Spatial Adaptation" author: - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Vânia Vieira Estrela" link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100" - name: "Vânia Estrela" link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/" - name: "Vânia Estrela" link: "http://researchr.org/alias/v%C3%A2nia-vieira-estrela" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Vania Vieira Estrela" link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Vania Vieira Estrela" link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0" year: "2012" abstract: "Besides being an ill-posed problem, the pel-recursive computation of 2-D optical flow raises a wealth of issues, such as the treatment of outliers, motion discontinuities and occlusion. Our proposed approach deals with these issues within a common framework. It relies on the use of a data-driven technique called Generalized Cross Validation (GCV) to estimate the best regularization scheme for a given moving pixel. In our model, a regularization matrix carries information about different sources of error in its entries and motion vector estimation takes into consideration local image properties following a spatially adaptive. Preliminary experiments indicate that this approach provides robust estimates of the optical flow." links: "url": "http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.224.9608" tags: - " spatial adaptation" - "data validation" - "video processing" - " image motion estimation " - "meta-model" - "regularization" - "2D optical flow " - "image processing" - "Motion estimation" - " generalized cross-validation technique " - "information models" - " occlusion " - "Meta-Environment" - " regularization matrix " - " regularized pel-recursive algorithms " - "systematic-approach" researchr: "https://researchr.org/publication/citeulike%3A11966066" cites: 17 citedby: 7 pages: "54-67" booktitle: "INTERNATIONAL JOURNAL OF IMAGE PROCESSING (IJIP)" kind: "inproceedings" key: "citeulike:11966066" - title: "Blind signal separation and identification of mixtures of images" author: - name: "Felipe Pereira do Carmo" link: "http://academic.research.microsoft.com/Author/49826901/f-p-do-carmo" - name: "Joaquim Teixeira de Assis" link: "http://lattes.cnpq.br/7307238902576135" - name: "Vania Vieira Estrela" link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial" - name: "Joaquim Teixeira de Assis" link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis" - name: "Joaquim Teixeira Assis" link: "http://academic.research.microsoft.com/Author/35574429/joaquim-teixeira-de-assis" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial" year: "2009" month: "nov" doi: "10.1109/ACSSC.2009.5470083" abstract: "In this paper, a novel technique for blind signal separation based on a combination of second order and higher order approaches is introduced. The problem of blind signal separation was solved in a wavelet domain. The main idea behind this approach is that the mixing signal can be decomposed into a sum of uncorrelated and/or independent sub-bands using the wavelet transform. In the beginning, the observed signal is prewhitened in the time domain then, the initial separation matrix will be estimated from second order statistics decorrelation method in the wavelet domain. The estimating matrix will be used as an initial separating matrix in the higher order statistics method in order to estimate the final separation matrix. The algorithm was tested using natural images. Extensive experiments have confirmed that the use of the proposed procedure provides promising results in separating the image from noisy mixtures of images." links: "url": "http://dx.doi.org/10.1109/ACSSC.2009.5470083" tags: - "rule-based" - "testing" - "systematic-approach" researchr: "https://researchr.org/publication/citeulike%3A7598576" cites: 24 citedby: 0 pages: "337-342" booktitle: "2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers" address: "http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=5470083" publisher: "IEEE" isbn: "978-1-4244-5825-7" kind: "inproceedings" key: "citeulike:7598576" - title: "Data-Driven Motion Estimation with Spatial Adaptation" author: - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Vânia Vieira Estrela" link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100" - name: "Vânia Estrela" link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/" - name: "Vânia Estrela" link: "http://researchr.org/alias/v%C3%A2nia-vieira-estrela" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Vania Vieira Estrela" link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Alessandra Martins Coelho" link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho" - name: "Vania Vieira Estrela" link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0" - name: "Vania Vieira Estrela" link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7" - name: "Vania Vieira Estrela" link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0" year: "2012" abstract: "Besides being an ill-posed problem, the pel-recursive computation of 2-D optical flow raises a wealth of issues, such as the treatment of outliers, motion discontinuities and occlusion. Our proposed approach deals with these issues within a common framework. It relies on the use of a data-driven technique called Generalized Cross Validation (GCV) to estimate the best regularization scheme for a given moving pixel. In our model, a regularization matrix carries information about different sources of error in its entries and motion vector estimation takes into consideration local image properties following a spatially adaptive. Preliminary experiments indicate that this approach provides robust estimates of the optical flow." links: "url": "http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.224.9608" tags: - " spatial adaptation" - "data validation" - "video processing" - " image motion estimation " - "meta-model" - "regularization" - "2D optical flow " - "image processing" - "Motion estimation" - " generalized cross-validation technique " - "information models" - " occlusion " - "Meta-Environment" - " regularization matrix " - " regularized pel-recursive algorithms " - "systematic-approach" researchr: "https://researchr.org/publication/citeulike%3A11966066" cites: 17 citedby: 7 pages: "54-67" booktitle: "INTERNATIONAL JOURNAL OF IMAGE PROCESSING (IJIP)" kind: "inproceedings" key: "citeulike:11966066"