Triangular Series Fitting-Based Harmonic Error Correction Method for Indirect Time-of-Flight Camera 基于三角级数拟合的间接飞行时间相机谐波误差校正方法

Zhaoxiang，Jiang1,2; Zhan，Song1; Zhenzhong，Xiao2; Xuan，Ma3; Shaoguang，Shi2; Fei，Wang4

2023-04-01

10.3788/LOP230458

Laser and Optoelectronics Progress   Impact Factor & Quartile

1006-4125

A swinging harmonic error occurs between the measured distance of the indirect timeofflight (ITOF) camera and the real distance due to the nonideal factors of the optical waveform of the laser transmitter and the tap response of the imaging sensor. The harmonic error can interfere with the accuracy of distance measurement. This paper analyzes the causes of harmonic error in ITOF cameras and clarifies the relationship between the harmonic error period, ranging period, and number of pixel taps. Based on triangular series fitting, this work proposes a method to correct such harmonic errors in a short calibration range and a large calibration step, which improves the calibration efficiency. The effectiveness of the proposed method is verified through 66. 67 MHz 3-tap ITOF camera ranging experiments. The experimental results show that the average distance measurement accuracy of the principal point pixel is 2. 5787 mm, while the average plane fitting error in the plane distance measurement is 4. 3876 mm. Thus, the findings emphasize that the proposed method can effectively reduce the harmonic errors in distance measurements using ITOF cameras.

depth calibration harmonic error indirect time-of-flight camera remote sensing and sensor

ESCI

Chinese

Others

Engineering ; Optics

Engineering, Electrical & Electronic ; Optics

WOS:000996093000027

SHANGHAI INST OPTICS & FINE MECHANICS, CHINESE ACAD SCIENCE

2-s2.0-85158867298

Scopus

1.Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen,Guangdong,518055,China
2.Orbbec Inc,Shenzhen,Guangdong,518062,China
3.School of Microelectronics,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.Shenzhen Oxin Technology Co.,Ltd.,Shenzhen,Guangdong,518062,China

Zhaoxiang，Jiang,Zhan，Song,Zhenzhong，Xiao,等. Triangular Series Fitting-Based Harmonic Error Correction Method for Indirect Time-of-Flight Camera 基于三角级数拟合的间接飞行时间相机谐波误差校正方法[J]. Laser and Optoelectronics Progress,2023,60(8).

Zhaoxiang，Jiang,Zhan，Song,Zhenzhong，Xiao,Xuan，Ma,Shaoguang，Shi,&Fei，Wang.(2023).Triangular Series Fitting-Based Harmonic Error Correction Method for Indirect Time-of-Flight Camera 基于三角级数拟合的间接飞行时间相机谐波误差校正方法.Laser and Optoelectronics Progress,60(8).

Zhaoxiang，Jiang,et al."Triangular Series Fitting-Based Harmonic Error Correction Method for Indirect Time-of-Flight Camera 基于三角级数拟合的间接飞行时间相机谐波误差校正方法".Laser and Optoelectronics Progress 60.8(2023).