Synchronization of a New Light-Flashing Shield With an External-Triggered Camera

• Castillo-Zamora José de Jesus
• Nègre Amaury
• Ingargiola Jean-Marc
• Ndoye Abdoullah
• Pouthier Florian
• Dumon Jonathan
• Durand Sylvain
• Marchand Nicolas
• Ruffier Franck

• Sensor packaging
• Light-flashing shield and camera synchronization
• External-triggered camera
• Image capture
• Light-flashing shield
• Poor light conditions
• Synchronization

In this letter, we describe a new light-flashing shield to be used at flash-based imaging or event-based vision tasks performed in environments with poor light conditions. The shield incorporates a multiplexer that permits setting of the operation mode, the nominal current, the pulse width, and the trigger sensitivity of up to 2 high-brightness LEDs by means of a single inter-integrated circuit (I2C) bus. A trigger conditioning circuit permits synchronization of the LEDs light and an Intel RealSense d455 camera to obtain a set of clear images while the LEDs are illuminated, this feature being the main novelty and contribution of this work, in order to provide light on-demand in visual-based tasks performed in environments with poor light conditions. Images obtained during real tests prove the correct synchronization between the light-flashing shield and the camera.