Budget-aware Semi-Supervised Semantic and Instance Segmentation

Methods that move towards less supervised scenarios are key for image segmentation, as dense labels demand significant human intervention. Generally, the annotation burden is mitigated by labeling datasets with weaker forms of supervision, e.g. image-level labels or bounding boxes. Another option are semi-supervised settings, that commonly leverage a few strong annotations and a huge number of unlabeled/weakly-labeled data. In this paper, we revisit semi-supervised segmentation schemes and narrow down significantly the annotation budget (in terms of total labeling time of the training set) compared to previous approaches. With a very simple pipeline, we demonstrate that at low annotation budgets, semi-supervised methods outperform by a wide margin weakly-supervised ones for both semantic and instance segmentation. Our approach also outperforms previous semi-supervised works at a much reduced labeling cost. We present results for the Pascal VOC benchmark and unify weakly and semi-supervised approaches by considering the total annotation budget, thus allowing a fairer comparison between methods.Comment: To appear in CVPR-W 2019 (DeepVision workshop

Puertos y comercio marítimo en la España visigoda

Nuestro trabajo aborda el estudio de los puertos existentes en el reino\ud visigodo de Toledo. Junto al intento de establecer su número, distribución y\ud estructura -tarea complicada debido a la escasez de fuentes, tanto escritas como\ud arqueológicas-, pretendemos analizar las relaciones de los comerciantes con\ud el poder visigodo, así como las vías por las que se realizaba este comercio\ud ultramarino, destacando la profunda divergencia que se establecía entre los\ud ámbitos cantábrico y mediterráneo.Our paper looks out the ports that existed during the Visigothic kingdom in\ud Toledo. We are trying to find out not only their number, distribution an structure,\ud but also to analyse the relationships between the traders and the visigothic power,\ud as well as the very way this trade was carried out. We also point out the major\ud differences between the Cantabrian and Mediterranean coast at the time

Per avançar, millor amb claror

Publicat el 24 de maig de 2016 al diari Ar