Patent ID: 11930569
Assignee: PROCEMEX OY
Field: Measurement (Instruments)
Classification: CPC G  H  D  F | IPC F  G  H

Claim 9:
10. A computer program product embodied on a non-transitory computer readable medium, comprising computer program code configured to, when executed on at least one processor, cause a system to perform the method comprising:
obtaining image data,
analyzing image data,
detecting intensity deviations in an illumination pattern provided by an LED matrix lighting device in the captured images, which LED matrix lighting device comprises a plurality of LEDs, a collimating lens in front of each LED for collimating light of the LED, and a light refracting element in front of collimating lenses arranged to refract light of at least a first part of the LEDs with a different refraction angle than at least a second part of the LEDs, and wherein current provided for at least one LED is adjustable based on detected intensity deviations in a captured image, and which a FWHM viewing angle of the collimated light of LEDs is substantially as large as the difference between the refraction angles, and
adjusting current provided for at least one LED of the LED matrix lighting device based on detected intensity deviations in a captured image.