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GRASP Special Seminar: Ziwei Wang, Australian National University, “A Linear Comb Filter for Event Flicker Removal”

May 31, 2022 @ 11:00 am - 12:00 pm

*This is a HYBRID Event with in-person attendance in Levine 307 and virtual attendance via Zoom.


Event cameras are bio-inspired sensors that capture per-pixel asynchronous intensity change rather than the synchronous absolute intensity frames captured by a classical camera sensor. Such cameras are ideal for robotics applications since they have high temporal resolution, high dynamic range and low latency. However, due to their high temporal resolution, event cameras are particularly sensitive to flicker such as from fluorescent or LED lights. During every cycle from bright to dark, pixels that image a flickering light source generate many events that provide little or no useful information for a robot, swamping the useful data in the scene. In this talk, I will introduce a novel linear filter to preprocess event data to remove unwanted flicker events from an event stream. The algorithm achieves over 4.6 times relative improvement in the signal-to-noise ratio when compared to the raw event stream due to the effective removal of flicker from fluorescent lighting. Thus, it is ideally suited to robotics applications that operate in indoor settings or scenes illuminated by flickering light sources.


Ziwei Wang

Ziwei Wang

Ziwei Wang is a PhD student at the College of Engineering and Computer Science, the Australian National University (ANU). She received her BE in Mechatronic Systems (first-class honors) from the ANU. Her research interests lie in neuromorphic cameras, image/video processing and robotic systems.


May 31, 2022
11:00 am - 12:00 pm
Event Category:


Levine 307
3330 Walnut St
Philadelphia, PA 19104 United States
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