Open AccessAutomatic Measurement of Digital Cameras’ Exposure Time Using Equivalent Sampling
Author(s) -
Gyula Simon,
Mark Ratosi,
Gergely Vakulya
Publication year - 2022
Publication title -
ieee transactions on instrumentation and measurement
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 119
eISSN - 1557-9662
pISSN - 0018-9456
DOI - 10.1109/tim.2022.3186372
Subject(s) - power, energy and industry applications , components, circuits, devices and systems
This article presents a novel method to measure the exposure time of digital cameras. The measurement relies on a sequence of images taken by the camera in video mode, using the effect of equivalent sampling. The hardware requirements of the proposed method are low: a signal generator drives an LED source and the blinking LED is recorded by the camera under test. The exposure time is determined from the recorded images and the frequency of the generator. The detailed error analysis of the proposed method is provided, and its performance is validated by real measurements. The measurements indicate that the proposed solution is able to provide estimates with uncertainties in the low microsecond range.