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Phase unwrapping method, device, system, computer equipment and storage medium

A technology of unpacking and phasing, applied in the field of image processing research, to achieve the effect of improving precision, improving efficiency and accuracy, and avoiding manually setting thresholds

Active Publication Date: 2021-01-08
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a phase unwrapping method, device, system, computer equipment and storage medium, which has high precision of phase unwrapping, improves the efficiency and accuracy of the real phase restoration of the wrapped phase interferogram, and solves the problem of solves the problems existing in the existing phase unwrapping algorithm

Method used

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  • Phase unwrapping method, device, system, computer equipment and storage medium
  • Phase unwrapping method, device, system, computer equipment and storage medium
  • Phase unwrapping method, device, system, computer equipment and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0076] Phase contrast method is a common quantitative phase distribution imaging method, which is widely used in transparent biomedical cell microscopic imaging, transparent material or microlens detection, interferometry, flow field density distribution measurement and other fields. The phase unwrapping process is often involved in the reconstruction of real phase distribution by phase contrast method in the whole field.

[0077] Suppose the sample of the target object is a pure phase transparent object, referred to as a phase object, and the parallel light with amplitude A is incident on the object plane, then the complex amplitude of the object light field can be expressed as:

[0078]

[0079] If the influence of the finite aperture of the coherent optical system is ignored, its spectrum is:

[0080]

[0081] If a Zernike phase plate is added to the spectrum surface, its spatial filtering function is:

[0082]

[0083] Among them, t and are the amplitude transm...

Embodiment 2

[0129] like Figure 9 As shown, this embodiment provides a phase unwrapping device, which can be applied to a computer, which includes an acquisition module 901, a preprocessing module 902, a first determination module 903, a second determination module 904, and a flip replacement module 905 , processing module 906, calculation module 907, return module 908, first output module 909 and second output module 910, the specific functions of each module are as follows:

[0130] The acquiring module 901 is configured to acquire the wrapping phase interferogram.

[0131] The preprocessing module 902 is used to preprocess the wrapping phase interferogram, and convert the arccosine wrapping phase interferogram into an arctangent wrapping phase interferogram if necessary in the actual process.

[0132] The first determining module 903 is configured to determine a threshold.

[0133] The second determining module 904 is configured to determine a concave boundary wrapping the phase matr...

Embodiment 3

[0147] This embodiment provides a computer device, which may be a computer, such as Figure 11As shown, it includes a processor 902 connected through a system bus 1101, a memory, an input device 1103, a display 1104, and a network interface 1105. The processor is used to provide computing and control capabilities. The memory includes a non-volatile storage medium 1106 and internal Memory 1107, the non-volatile storage medium 906 stores an operating system, computer programs and databases, the internal memory 1107 provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium, and the processor 1102 executes memory storage During the computer program, realize the phase unwrapping method of above-mentioned embodiment 1, as follows:

[0148] Obtain the package phase interferogram;

[0149] determine the threshold;

[0150] Determine the concave boundary wrapping the phase matrix through the threshold to form a flipping...

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Abstract

The invention discloses a phase unwrapping method, device and system, computer equipment and a storage medium. The method comprises the steps of obtaining a wrapped phase interferogram; determining athreshold value; determining a recess boundary wrapping the phase interferogram through the threshold value to form an overturning critical line; automatically overturning and replacing a recess partof the wrapped phase interferogram to obtain a first unwrapping phase matrix; filtering and smoothing the first unwrapping phase matrix to obtain a second unwrapping phase matrix; calculating and storing a relative error between the first unwrapping phase matrix and the second unwrapping phase matrix; when the threshold value does not reach a preset value, re-determining the threshold value and executing subsequent operation; when the threshold value reaches the preset value, outputting the threshold value corresponding to the minimum relative error and the second unwrapping phase matrix; andoutputting reconstructed real phase distribution according to the second unwrapping phase matrix corresponding to the minimum relative error. According to the invention, the efficiency and accuracy ofreal phase restoration of the wrapped phase interferogram are improved.

Description

technical field [0001] The invention relates to a phase unwrapping method, device, system, computer equipment and storage medium, belonging to the field of image processing research. Background technique [0002] Phase unwrapping calculation is widely used in interferometric synthetic aperture radar, three-dimensional measurement based on structured light, optical interferometry and imaging and other measurement methods. In the process of obtaining the phase from the wrapped interferogram, it is generally necessary to use the arctangent norm to extract the phase, so that the continuous phase is truncated, and the value range is limited to (-π, π], forming a wrapped phase diagram. Therefore, it is necessary to analyze the wrapped phase Perform unwrapping and reconstruct the truncated phase to obtain the real continuous phase. However, in actual situations, due to factors such as undersampling, noise, and local shadows, residual point areas often appear in the wrapped phase, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24G01B11/00G01S13/90
CPCG01B11/00G01B11/2433G01S13/9005G01S13/9023
Inventor 黄佐华林盼明罗都彭力
Owner SOUTH CHINA NORMAL UNIVERSITY
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