Parametric modeling and experimental measurement of rolling shutter characteristics for optical camera communication...

Area of Science:

• Optoelectronics
• Image Sensors
• Optical Communications

Background:

• Rolling shutter cameras are widely used in complementary metal-oxide-semiconductor (CMOS) imaging.
• Optical Camera Communication (OCC) systems utilize visible light for data transmission.
• Demodulating undersampled On-Off Keying (OOK) symbols in OCC is sensitive to camera characteristics.

Purpose of the Study:

• To develop a parametric model for the rolling shutter transfer function in CMOS cameras.
• To analytically characterize how light intensity is converted to image brightness by the rolling shutter.
• To provide insights for improving OCC performance with undersampled modulation.

Main Methods:

• A parametric model was proposed to describe the rolling shutter transfer function.
• An effective sampling technique was employed to measure the rolling shutter effect.
• Low-frame-rate CMOS cameras were used for experimental validation.

Main Results:

• The proposed model accurately characterizes the rolling shutter transfer function.
• Experimental measurements validated the analytical model.
• The study provided insights into threshold adaptation for OCC.

Conclusions:

• The developed parametric model is crucial for understanding rolling shutter effects in OCC.
• The findings contribute to the error performance analysis of OCC systems using undersampled modulation.
• This research enhances the practical application of OCC technology.