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Flight time migration correction method, ToF device, electronic equipment and storage medium

A time-of-flight and offset compensation technology, which is applied in electronic equipment and storage media, ToF devices, and correction of time-of-flight offsets, and can solve the problems affecting the accuracy of time-of-flight ranging, the loss count of sensing optical signals, and the histogram of photon counts. Image distortion and other problems, to achieve the effect of improving the low flight time, accurate 3D sensing function, and improving the accuracy of ranging

Active Publication Date: 2022-05-17
SHENZHEN FUSHI TECH CO LTD
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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

Method used

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  • Flight time migration correction method, ToF device, electronic equipment and storage medium
  • Flight time migration correction method, ToF device, electronic equipment and storage medium
  • Flight time migration correction method, ToF device, electronic equipment and storage medium

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[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0019] An embodiment of the present application provides a method for correcting a time-of-flight offset, which is used to correct the time-of-flight offset that exists when performing distance sensing based on the principle of time-correlated single photon counting. The correction method includes the steps of: obtaining a correlation detection The total number of sensing light signal emissions of a frame and the peak count and half-peak width of t...

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Abstract

The invention discloses a time-of-flight migration correction method, a ToF device, electronic equipment and a storage medium, and the correction method comprises the steps: obtaining the total emission times of a sensing optical signal of a related detection frame, and the peak value count and the half-peak width of a signal peak in a photon counting histogram; and obtaining the offset compensation data of the flight time corresponding to the signal peak in the related detection frame according to a preset association relationship by using the total sensing optical signal emission times of the related detection frame, the peak value count of the signal peak and the half-peak width. And correcting the flight time measured according to the corresponding signal peak in the related detection frame by using the obtained offset compensation data of the flight time. Through the above mode, deviation of the measured flight time caused by a stacking effect can be effectively corrected, and the accuracy of distance detection is improved.

Description

technical field [0001] The present application relates to the technical field of ToF sensing, in particular to a method for correcting time-of-flight offsets, a ToF device, electronic equipment, 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 the scene. The ToF device emits sensing light signals to the measurement scene according to the preset emission cycle, and senses the light signal from the measurement scene through a photosensitive device, such as Single Photon Avalanche Diode (SPAD), and generates corresponding light After sensing the signal, count the light sensing signal according to the sensing time, and then make histogram statistics on the count of the light sensing signal, and select the sensing time with the highest frequency of occurrence as the flight time of the sensing light si...

Claims

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Application Information

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IPC IPC(8): G01S7/487G01S7/4863G01S7/497G01S17/08G01S17/894G06F30/25
CPCG01S7/487G01S7/4863G01S7/497G01S17/08G01S17/894G06F30/25
Inventor 李佳鹏莫良华吕晨晋张耿立陈艺章汪浩
Owner SHENZHEN FUSHI TECH CO LTD
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