Real time phase calculation of phase shifted structured light based on one-dimensional look-up table

Ying Songlin; Hu Dan; Liu Kai

doi:10.11884/HPLPB202234.220159

Volume 34 Issue 12

Nov. 2022

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Ying Songlin, Hu Dan, Liu Kai. Real time phase calculation of phase shifted structured light based on one-dimensional look-up table[J]. High Power Laser and Particle Beams, 2022, 34: 121003. doi: 10.11884/HPLPB202234.220159

Citation:

Ying Songlin, Hu Dan, Liu Kai. Real time phase calculation of phase shifted structured light based on one-dimensional look-up table[J]. High Power Laser and Particle Beams, 2022, 34: 121003. doi: 10.11884/HPLPB202234.220159

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Real time phase calculation of phase shifted structured light based on one-dimensional look-up table

doi: 10.11884/HPLPB202234.220159

Ying Songlin^1
,,
Hu Dan^{2
,
,},
Liu Kai^1
,

1.
College of Electrical Engineering, Sichuan University, Chengdu 610065, China
2.
Chengdu Institute of Product Quality Inspection, Chengdu 610199, China

Received Date: 2022-05-16
Accepted Date: 2022-06-20
Rev Recd Date: 2022-05-29

Available Online: 2022-11-02

Publish Date: 2022-11-02

Abstract

Abstract

We propose a fast phase decoding algorithm based on a one-dimensional look-up table. Firstly, according to the property of the arctangent function in the phase calculation formula, the phase relationship between the four quadrants is obtained. A linear function is used to map the coordinate points in the first quadrant to a discrete integer interval, and a one-dimensional look-up table of phases is established in advance by combining the interval with the linear function. In the process of phase calculation, firstly, the index of the one-dimensional look-up table is calculated by using relevant information to directly obtain the phase value, and then the phase value is adjusted by the linear interpolation method and phase relationship to obtain the final real phase. Experiments have verified the effectiveness of the proposed algorithm. Compared with the traditional phase calculation method, the proposed method can improve the speed by 3.97 times, 1.29 times compared with the traditional polynomial approximation algorithm, and 1.20 times compared with the traditional one-dimensional look-up table algorithm.
- phase shifted structured light,
- phase calculation,
- arctangent function,
- look-up table,
- real-time calculation

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References(20)

References

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