Method of controlling a segmented flash system

A method for operating a segmented flash system, the segmented flash system including an array of light emitting diodes (LEDs), the LEDs of the array of LEDs being configured to illuminate respective regions of a scene, the method comprising:

• measuring forward voltages of respective LEDs of the array of LEDs, the forward voltages being dependent on respective temperatures of the respective LEDs of the array of LEDs;
• receiving an illumination profile for illuminating the scene;
• computing drive power values based on the illumination profile and the forward voltages, the drive power values configured to at least partially compensate for at least one of temperature-related illuminance difference or temperature-related color shift across the array of LEDs;
• and
• providing the drive power values to the LEDs of the array of LEDs to generate a flash to illuminate the scene.

A segmented flash system, comprising:

• a light emitting diode (LED) array, the LED array including a plurality of individually controllable LED segments;
• a flash driver configured to control the LED array;
• a processor configured to cause the flash driver to controllably apply current to at least some of the LED segments in the plurality of LED segments;
• and
• memory including instructions that, when executed by the processor, cause the processor to perform operations, the operations comprising:
• generating a first flash by causing the flash driver to electrically power at least one LED segment of the plurality of LED segments;
• after generating the first flash, determining forward voltages of the LED segments of the plurality of LED segments;
• receiving an illumination pattern;
• and
• generating a second flash by causing the flash driver to electrically power the LED segments of the plurality of LED segments based at least in part on the illumination pattern and the forward voltages.