Ana Pérez Grassi

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Varnishing and painting are quite delicate processes susceptible to failures. This becomes especially critical whenever an aesthetic finish is decisive for the final product. Such is the case, for example, in production of furniture, musical instruments, and paper, among many others. Dozens of different defects with very varied shapes can affect varnished(More)
A novel approach to detect pedestrians and to classify them according to their moving direction and relative speed is presented in this paper. This work focuses on the recognition of pedestrian lateral movements , namely: walking and running in both directions, as well as no movement. The perception of the environment is performed through a lidar sensor and(More)
During the manufacturing of printed electronic circuits, different layers of coatings are applied successively on a substrate. The correct thickness of such layers is essential for guaranteeing the electronic behavior of the final product and must therefore be controlled thoroughly. This paper presents a model for measuring two-layer systems through thin(More)
Some surfaces, likemetallic and varnished ones, can only be properly controlled , if theya re inspected under different illumination directions. This requires a three-dimensional input signal: aseries of images, where each image shows the same surface butisilluminated from adifferent angle. This paper presents amethod to extract translation and rotation(More)
Some surfaces can only be inspected reliably, if they are observed under variable illumination. An automated inspection based on this principle requires taking and processing series of images in which each image shows the same surface's section with an illumination from a different angle. This paper presents a method to extract translation and rotation(More)
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