Sampling in 2D: specificities, difficulties and applications
 
 
Description:  Sampling strategies are a fundamental part of any measurement process. In the signal framework (one-dimensional, 1D - usually the time), sampling is a well-controlled process. For two (images, 2D) and three (volumes, 3D) spatial dimensions, one is frequently faced with unknown objects or objects whose symmetries only become evident as the spatial resolution increases, being easy to get results that can either describe the reality or just be a set of artifacts resulting from the measurement process.
On the other hand, one increasingly deals with information brought to us through "displays" based on several techniques or produced by dynamic scanning processes. Due to its periodic or quasi-periodic nature, such mathematical objects do not always make possible the natural application of the Shannon theorem, confronting us with the need of different analysis methods.
This seminar aims to draw the attention to a variety of artifacts emerging when processing images, from which several applications arise, profiting both from their stability, or from their singular nature and instability.
Date:  2012-06-20
Start Time:   16:00
Speaker:  José Manuel Rebordão (DF/FCUL)
Institution:  FCUL
Place:  Auditorium 1, FMUC Auditoriums (Health Sciences Campus, at IBILI)
Organization:  LCM and IBILI
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