Encontrados 6 documentos, a visualizar página 1 de 1
Distance measures for image segmentation evaluation
Monteiro, Fernando C.; Campilho, Aurélio C.In this paper we present a study of evaluation measures that enable the quantification of the quality of an image segmentation result. Despite significant advances in image segmentation techniques, evaluation of these techniques thus far has been largely subjective. Typically, the effectiveness of a new algorithm is demonstrated only by the presentation of a few segmented images and is otherwise left to subject...
O reconhecimento de imagens na classificação automática de produtos naturais
Campilho, Aurélio Joaquim de CastroDissertação apresentada para obtenção do grau de Doutor na Faculdade de Engenharia da Universidade do Porto, sob a orientação do Prof. Doutor José Carlos Diogo Marques dos Santos
Region and graph-based motion segmentation
Monteiro, Fernando C.; Campilho, AurélioIndexado ISI ; This paper describes an approach for integrating motion estimation and region clustering techniques with the purpose of obtaining precise multiple motion segmentation. Motivated by the good results obtained in static segmentation we propose a hybrid approach where motion segmentation is achieved within a region-based clustering approach taken the initial result of a spatial pre-segmentation and ...
Image segmentation using region merging combined with a multi-class spectral me...
Monteiro, Fernando C.; Campilho, AurélioIn this paper we propose an image segmentation algorithm that combines region merging with spectral-based techniques. An initial partitioning of the image into primitive regions is produced by applying a region merging approach which produces a chunk graph that takes in attention the image gradient magnitude. This initial partition is the input to a computationally efficient region segmentation process that pro...
Performance evaluation of image segmentation
Monteiro, Fernando C.; Campilho, AurélioIn spite of significant advances in image segmentation techniques, evaluation of these methods thus far has been largely subjective. Typically, the effectiveness of a new algorithm is demonstrated only by the presentation of a few segmented images that are evaluated by some method, or it is otherwise left to subjective evaluation by the reader. We propose a new approach for evaluation of segmentation that takes...
Spectral methods in image segmentation: a combined approach
Monteiro, Fernando C.; Campilho, AurélioIndexado ISI ; Grouping and segmentation of images remains a challenging problem in computer vision. Recently, a number of authors have demonstrated a good performance on this task using spectral methods that are based on the eigensolution of a similarity matrix. In this paper, we implement a variation of the existing methods that combines aspects from several of the best-known eigenvector segmentation algorit...
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