Okay, also good afternoon, everybody. In fact, not everybody. We have our speaker now from

Chicago. So I say good morning, Florian. Morning, yeah. Welcome on the screen here.

The disclaimer was already given by Norbert Lindlein, so I can just switch to the introduction

of Florian here. He's now a research assistant professor at Northwestern University. As you

see here, it is an Ivy League university in the background. It's Ivy, I hope, not a vineyard.

And what he is doing there, I think he will tell us immediately, so I don't care about

this now. But I can say something about the past because Florian came, we've known each

other since, I don't know, 15 years or even more. So he came to my group, I think, very

early before the master thesis. And we did a lot of joint work about 3D sensors and specifically

about the physical and information theoretical limits of those sensors. And obviously, this

is something very fascinating. So he tries to push this in America as well. And what

I have to say as well, which is important, he not even did the research there, but he

implemented the sensors. So there are several sensors working in industry and medical, for

medical cares, for dental care. And one of the sensors is even at the Max Planck Institute,

or has been there, to measure the future Nobel Award winner's face. But I think I don't tell

too much more, give him the microphone. And did I forget something? Yeah, I forgot that

he made his PhD in 2017 here at Erlang before he went to Northwestern. Yeah, Florian, I

think we will all be very curious about what you are talking, seeing around the corners.

I think most of us can't really imagine what that is.

I will tell you, hopefully. Okay. So you should see my screen now, PowerPoint presentation,

and I start the presentation. And you should see the slide view, right? Not this. Yes,

we can see it. Yes. Okay. Good. How do I do this here? Okay. Yeah. Good afternoon to Erlangen.

And thank you, Gerd, for this very nice introduction. So first, I have to say that I'm extremely

excited to be back to my former university, even if it's not in the physical form today

and only virtual. And of course, I also want to say that I feel basically very honored

about this kind invitation to speak today at the physics colloquium. So again, my name

is Florian Willemitzer, and I'm currently working as a research assistant professor

at Northwestern University in the computational photography lab. And in my talk today, I'm

going to talk about a relatively new and fancy problem in computational imaging, which is

the ability to image around corner and through scatterers. And the funny thing is that the

basic techniques we use to solve this problem are already relatively old, but we exploit

these techniques to do something very new and exciting, namely holography through scattering

scenes. And before I start, I will shortly introduce Northwestern University and our

group. And so quick question, can you see my cursor here? Hello? Yes. Yes. You can see

my cursor. Okay. Good. So Northwestern University, as I was already saying earlier, is located

in Evanston, Illinois. And this is approximately a 30 minutes drive away from Chicago here.

And as you can see, it has a lovely campus, which is directly on the shore of Lake Michigan.

And if you look very closely, you even see here Chicago in the background. And this is

the current roster of our group, the computational photography lab. And together with our collaborators

here on the bottom, we are working on a wide range of computational imaging applications

that basically reach from the micro scale to the astronomical scale. And a few projects

are shown on this slide here. So here on this slide, you see a subset of group projects

that I'm currently working on with my students and my colleagues and my collaborators. And

some of these projects are extensions of things that we did in Erlangen and some others we

also have started from scratch when I joined Northwestern University. And as you can see,

the projects on this slide, they span some range between very applied research and development

and also more basic research. But of course, it's a little bit in the eye of the beholder

what basic research really means here, because for some of you, all this research that you

see on this slide might still be very applied research.

And since I will only introduce you to the synthetic wavelengths holography project today