FIELD: electrical communication equipment.
SUBSTANCE: invention relates to image processing. Device (6) comprises an input for receiving image data representing light captured by camera (16), the camera having an exposure time and the light being captured over a sequence of exposures, each lasting for an instance of the exposure time, image analysis module (12) for detecting a coded light component modulated into the light with a modulation frequency, there being a frequency blind spot in said detection due to an effect of said exposure time. An output for controlling one or more parameters of the camera which affect the exposure time, and controller (14) configured to control the parameters to avoid a situation when modulation frequency corresponds to the frequency blind spot.
EFFECT: technical result is elimination of the frequency blind spot.
15 cl, 8 dwg
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