<div dir="ltr"><div class="gmail_default" style=""><div style=""><p style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;margin:0px"><font face="georgia, serif" style=""><b style=""><font style="vertical-align:inherit"><font style="vertical-align:inherit">When:    </font></font></b><font style="vertical-align:inherit"><font style="vertical-align:inherit"> Friday, May 5th at <b><font color="#000000" style="background-color:rgb(255,255,0)">10:30 AM CT</font></b></font></font><br></font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif"> </font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif"><font style="vertical-align:inherit"><font style="vertical-align:inherit"><b>Where:    </b><span class="gmail_default"><b></b></span><span class="gmail_default">T</span></font></font><span style="color:rgb(0,0,0)">alk will be giv</span><span style="color:rgb(0,0,0)">en </span><font style="color:rgb(0,0,0);font-weight:bold"><u style="background-color:rgb(255,255,0)">live, in-person</u></font><font style="color:rgb(0,0,0);font-weight:bold"> </font><span style="color:rgb(0,0,0)">at</span></font></p><p class="MsoNormal" style="margin:0in;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font color="#000000" face="georgia, serif">                     TTIC, 6045 S. Kenwood Avenue</font></p><p class="MsoNormal" style="margin:0in;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font color="#000000" face="georgia, serif">                     5th Floor, Room 530<b> </b></font></p><p class="MsoNormal" style="margin:0in;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font color="#000000" face="georgia, serif"><b><br></b></font></p><p class="MsoNormal" style="margin:0in;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif"><b style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap">Virtually:  </b><span style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap">  via Panopto</span><b style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap"> (<a href="https://www.google.com/url?q=https://uchicago.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id%3De3aaf8be-0719-4b83-a446-aff50147fa10&sa=D&source=calendar&ust=1683402961318621&usg=AOvVaw3SVc5wQfUSy1EORxGDIn-5" target="_blank">Livestream</a>) </b><font color="#000000"><b><br></b></font></font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif"> </font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif"><b><font style="vertical-align:inherit"><font style="vertical-align:inherit">Who:      <span class="gmail_default"></span>   </font></font></b>Johannes Schmidt-Hieber, University of Twente</font></p></div><div style=""><b style="color:rgb(33,33,33)"><font face="georgia, serif"><br></font></b></div><div style=""><font face="georgia, serif"><b style="color:rgb(33,33,33)">Title:         </b>Intrinsic images, lighting, and relighting without any labelling</font></div><div style=""><p style=""></p><div style=""><div class="gmail_default" style=""><font face="georgia, serif" style=""><b style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap">Abstract:   </b><span style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap">The availability of massive image databases resulted in the development of scalable machine learning</span><span style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap">methods such as convolutional neural network (CNNs) filtering and processing these data. While the very recent theoretical work on CNNs focuses on standard nonparametric denoising problems, the variability in image classification datasets does, however, not originate from additive noise but from variation of the shape and other characteristics of the same object across different images. To address this problem, we consider a simple supervised classification problem for object detection on grayscale images. While from the function estimation point of view, every pixel is a variable and large images lead to high-dimensional function recovery tasks suffering from the curse of dimensionality, increasing the number of pixels in our image deformation model enhances the image resolution and makes the object classification problem easier. We propose and theoretically analyze two different procedures. The first method estimates the image deformation by support alignment. Under a minimal separation condition, it is shown that perfect classification is possible. The second method fits a CNN to the data. We derive a rate for the misclassification error depending on the sample size and the number of pixels. Both classifiers are empirically compared on images generated from the MNIST handwritten digit database. The obtained results corroborate the theoretical findings. This is joint work with Sophie Langer (Twente).</span><span style="letter-spacing:0.2px"><br style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap"><br style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap"></span></font><p style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap"><font face="georgia, serif"><b>B</b><b>io:</b>     Johannes Schmidt-Hieber received the master’s degree from the University of Göttingen, Germany, in 2007, and the joint Ph.D. degree from the University of Göttingen and the University of Bern, Switzerland, in 2010. His Ph.D. degree was followed by two one-year post-doctoral visits at Vrije Universiteit Amsterdam, The Netherlands, and ENSAE, Paris, France. From 2014 to 2018, he was an Assistant Professor at the University of Leiden. Since 2018, he has been a Full Professor at the University of Twente, The Netherlands. His research interests include mathematical statistics, including nonparametric Bayes and statistical theory for deep neural networks. He serves as an Associate Editor for the Annals of Statistics, Bernoulli, Electronic Journal of Statistics, and Information and Inference.</font></p><p style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap"><font face="georgia, serif"><br></font></p><p style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap"><font face="georgia, serif" style=""><b style="">Hos</b><b style="">t: <a href="mailto:nati@ttic.edu" style="">Nathan Srebro</a></b></font></p></div><div style="font-size:small;font-family:Arial,Helvetica,sans-serif"><br></div></div></div></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><b style="background-color:rgb(255,255,255)"><font color="#3d85c6">Brandie Jones </font></b><div><div><div><font color="#3d85c6"><b><i>Executive </i></b></font><b style="color:rgb(61,133,198)"><i>Administrative Assistant</i></b></div></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6">Toyota Technological Institute</font></span></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6">6045 S. Kenwood Avenue</font></span></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6">Chicago, IL  60637</font></span></div></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6"><a href="http://www.ttic.edu" target="_blank">www.ttic.edu</a> </font></span></div><div><font color="#3d85c6"><div style="background-color:rgb(238,238,238)"><div style="color:rgb(32,33,36)"><span style="color:rgb(61,133,198)">Working Remotely on Tuesdays</span></div></div></font></div></div></div></div>