<div dir="ltr">Hola,<div><br></div><div>el profesor Pedro Andrés de la Universidad de Valencia, España, visitará el departamento de Física el día 2 de junio. A las 15 horas nos reuniremos en la pecera grande para escuchar sobre sus últimas investigaciones en "Single- pixel multi-dimensional imaging". A continuación envío un resumen de esta línea de investigación, para los que estén interesados. Saludos,</div>
<div><br></div><div><br></div><div>Silvia</div><div><br></div><div><br></div><div>-------------------------------------------------------------------------------------------------------------<br clear="all"><div><div>Single-pixel multi-dimensional imaging </div>
<div>P. Andrés </div><div>Departamento de Óptica, Universidad de Valencia, E46100 Burjassot, Spain. </div><div> </div><div>Compressive sensing turns out to be an ongoing revolution in information theory that </div><div>allows us to acquire less data than traditional techniques though still recover the same </div>
<div>amount of information. The quintessential example of compressive sensing in optics is </div><div>the single-pixel camera. </div><div>In this direction, in the last years we developed some unconventional imaging </div>
<div>techniques that use light detectors without spatial resolution, i.e., having a single pixel, </div><div>as a photodiode and other dedicated sensors. In this way, we have implemented </div><div>different single-pixel cameras to measure not only the 2D spatial intensity distribution </div>
<div>of the object, but also others useful dimensions of the image, as polarization, spectrum, </div><div>and phase. </div><div>In the first part of the presentation we are going to discuss the basic ideas of </div><div>compressive sensing and how to apply the above concepts to implement a single-pixel </div>
<div>imaging architecture. In the second part we design a single-pixel polarimetric imaging </div><div>setup and a single-pixel hyperspectral camera that provide the two-dimensional </div><div>spatially-resolved inhomogeneous distribution of the state of polarization or the </div>
<div>chromatic information, respectively, of the input object. Additionally we show a digital </div><div>holographic technique for the detection of the amplitude and phase of the input signal </div><div>with a detector without spatial resolution. Finally we will also show that single-pixel </div>
<div>optical cameras can overcome the fundamental limitation imposed by multiple </div><div>scattering to successfully transmit information through a turbid medium. Experimental </div><div>results of the above novel imaging approaches will be shown.</div>
</div>-- <br><div>Dra. Silvia Ledesma<br>Laboratorio de Procesado de Imágenes<br>Departamento de Física<br>FCEyN, UBA</div>
<div>Tel 54 11 45763300 Int 269</div>
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