Using LEDs To Determine a Video Camera’s True Framerate
Originally published on hackaday.com by Maya Posch on 23 October 2023
In marketing, two common techniques, interpolation, and digital cropping, are employed to enhance a device’s specifications. Digital cropping can be used to create a fictitious zoom level, and interpolation artificially inflates the frames per second (FPS) recorded by a sensor. Yuri D’Elia encountered this when he purchased a smartphone, the Motorola Edge 30 Fusion, which advertised a 960 FPS recording rate at 720p. However, upon closer examination, it was revealed that this was not entirely accurate.
The smartphone claimed to support 240 and 960 FPS framerates at 720p, but the 50 MP OmniVision OV50A sensor in the rear camera officially supported only up to 480 FPS at 720p. Yuri conducted an experiment using LEDs blinking at different frequencies to determine the actual captured framerate in the phone. The disappointing result revealed that the smartphone could only achieve 240 FPS, failing to meet even the sensor’s specified 480 FPS capability.
This discovery highlights how marketing claims can sometimes misrepresent a device’s true capabilities, serving as a reminder of the influence of marketing departments in shaping consumer perceptions.
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