We are excited to share that Yanding will be speaking at AutoSens Europe in Barcelona on October 8. Our talk will focus on a new approach to spatial frequency response (SFR) measurement, which is central to evaluating imaging performance in automotive camera systems.

The current industry standard, the edge-based SFR (e-SFR) defined by ISO 12233, has proven highly effective but shows limitations when applied to wide-angle automotive cameras. Geometric distortion can bend straight edges and alter edge orientation, making accurate measurements challenging.

To address this, we propose using circular edges for SFR measurement. This method leverages binary sphere patterns—simple and accessible—while maintaining compatibility with the well-established straight-edge SFR algorithm. It also integrates the directional flexibility of Siemens star patterns with the broad spatial frequency coverage of edge-type patterns. Thanks to its omnidirectional nature, this approach eliminates the need for rotating test targets in mass production environments.

We believe this method offers a more robust and efficient way to measure SFR in wide-angle automotive camera modules, paving the way for more reliable performance evaluation in advanced driver-assistance systems (ADAS).

Looking forward to connecting with fellow researchers, engineers, and industry leaders in Barcelona!