Minimum discontinuousness two-dimension phase unwrapping method based on phase discontinuousness area detection

A technology of continuous area and phase unwrapping, applied in measuring devices, electromagnetic wave re-radiation, radio wave measurement systems, etc., can solve the problems of large resource occupation, low operating efficiency, and no contribution, so as to improve efficiency and overcome low efficiency, speed up effect

Inactive Publication Date: 2009-12-02
NANJING UNIV
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Problems solved by technology

Therefore, a large number of scans of non-phase discontinuity regions in the whole image scanning process have no contribution to the final phase unwrapping and are redundant. The Fylnn minimum discontinuity algorithm has the defects of large resource consumption and low operating efficiency.

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  • Minimum discontinuousness two-dimension phase unwrapping method based on phase discontinuousness area detection
  • Minimum discontinuousness two-dimension phase unwrapping method based on phase discontinuousness area detection
  • Minimum discontinuousness two-dimension phase unwrapping method based on phase discontinuousness area detection

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention is not limited thereto.

[0042] The phase diagram of the package to be unfolded is as follows: figure 2Shown is a wrapped phase map of a helical shear surface, with an image size of 257×257 pixels. It contains two planes that are entangled with each other and inclined to each other. The contour discontinuity between the two planes constitutes the boundary of the spiral shear. This wrapped phase map can be used to test the ability of the phase unwrapping method to handle complex contour discontinuities.

[0043] Firstly, the isolated noise pixels are removed from the wrapped phase image, and the specific process is as follows:

[0044] (1) According to the formula

[0045] v m , n = Int ...

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Abstract

A minimal in-continuous two-dimensional phase development method based on phase in-continuous region detection relates to the signal processing field, comprising the steps of; first, eliminating isolated noise pixel for a package phase diagram; then detecting phase in-continuous region in the phase diagram by an edge detection, an inflation and erosion method; searching for an increased circle in the phase in-continuous region to increase or decrease the number of jumps to make the minimal sum of number of jumps; last, developing entire package phase diagram according to the number of the jumps. The method avoids the increased circle cycled search of a redundancy in the non-phase in-continuous region, which overcomes defects of low technology utilization ratio and large resource occupation, improves efficiency of the phase development method; the method, by limiting the increased circle searching region in the region by detecting the phase in-continuous region, enables the noise not to be spread to the region, except the regions, where the phase development reliability is high and improves the phase development accuracy of the package phase diagram.

Description

technical field [0001] The present invention relates to the field of signal processing, in particular to a minimum discontinuous two-dimensional phase unwrapping method based on phase discontinuous region detection, which is used for fast and efficient wrapping phase maps wrapped in [-π, π) principal value intervals The phase unwrapping of , can be applied to fields involving coherent wave processing, such as optical interferometric topography, interferometric synthetic aperture radar, adaptive optics, and medical magnetic resonance imaging. Background technique [0002] The two-dimensional phase unwrapping problem exists in many research and application fields involving coherent wave processing, such as optical interferometric topography, interferometric synthetic aperture radar, adaptive optics, and medical magnetic resonance imaging. In these fields, the surface topography information of the research object is represented by the phase distribution on the two-dimensional p...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00G06F19/00G02B26/06G01B11/24G01S17/89
Inventor 路元刚张婷
Owner NANJING UNIV
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