Time-of-flight offset correction method, tof device, electronic device and storage medium

Abstract

The present application discloses a time-of-flight offset correction method, a ToF device, an electronic device and a storage medium, wherein the correction method includes: acquiring the total number of sensing optical signal emission times of a relevant detection frame and the peak count of signal peaks in a photon count histogram and half-peak width. The offset compensation data of the flight time corresponding to the signal peak in the relevant detection frame is obtained according to the preset correlation relationship by using the total number of sensing optical signal transmission times, the peak count of the signal peak and the half-peak width of the relevant detection frame. The time-of-flight measured according to the corresponding signal peak in the relevant detection frame is corrected by using the obtained offset compensation data of the time-of-flight. In the above manner, the present application can effectively correct the offset of the measured flight time caused by the accumulation effect, thereby improving the accuracy of distance detection.

Description

technical field [0001] The present application relates to the technical field of ToF sensing, and in particular, to a time-of-flight offset correction method, a ToF device, an electronic device, and a storage medium. Background technique [0002] Time of Flight (ToF) measurement technology is a ranging method that uses Time-Correlated Single-Photon Counting (TCSPC) technology to measure the distance of external objects in a scene. The ToF device emits a sensing optical signal to the measurement scene according to a preset emission period, and through a photosensitive device, such as a single photon avalanche diode (Single Photon Avalanche Diode, SPAD), senses the optical signal from the measurement scene and generates the corresponding light After sensing the signal, the light sensing signal is counted according to the sensing time, and then the count of the light sensing signal is counted as a histogram, and the sensing time with the highest frequency is selected as the fli...

AI Technical Summary

Problems solved by technology

Therefore, if the reflected sensing light signal is too strong, the sensing light signal reflected back in the first part of the emission cycle has caused most of the SPAD to avalanche, which will cause the subsequent returned sensing light signal to be unable to be sensed and count lost

Then, the obtained photon counting histogram will be distorted, affecting the accuracy of time-of-flight ranging

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