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Phase unwrapping method based on layered quantification tracking strategy

A technology of phase unwrapping and strategy, which is applied in the direction of measuring device, radio wave measurement system, radio wave reflection/re-radiation, etc., can solve the problems of low efficiency of phase unwrapping method, improve phase unwrapping accuracy, reduce error transfer effect, robust effect

Active Publication Date: 2015-10-28
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0003] What the present invention aims to solve is the problem of low efficiency in the existing phase unwrapping method, and provides a phase unwrapping method based on layered quantization tracking strategy

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  • Phase unwrapping method based on layered quantification tracking strategy
  • Phase unwrapping method based on layered quantification tracking strategy
  • Phase unwrapping method based on layered quantification tracking strategy

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Embodiment Construction

[0035] A phase unwrapping method based on a layered quantization tracking strategy. First, the interferometric pixels are divided into different quality levels by using the interferometric phase quality map, and the interferogram is sequentially expanded from high-quality level pixels to low-quality level pixels; then, the establishment of Based on the interferometric phase quality map as the path guidance map for guiding the integration path, it is quantized into an integer to guide the integration path; finally, the strategy of quantizing the path guidance map is introduced, and the adjacent winding pixels of the unfolded pixels are put into the queue array as the Expand the pixel, and determine the expansion order according to the size of the quantized path guide value of the pixel to be expanded in the queue array, expand the pixel to be expanded with the largest quantized path guide value in the queue array in each expansion step, and finally complete all winding Phase unw...

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Abstract

The present invention discloses a phase unwrapping method based on a layered quantification tracking strategy, comprising the steps of: dividing interference pixels into different quality grades by utilizing an interference phase quality graph, and unwrapping an interference pattern in the order from high-quality-grade pixels to low-quality-grade pixels; establishing a path guidance graph which is used for guiding an integration path based on the interference phase quality graph, quantizing the path guidance graph into integers and then guiding the integration path; introducing a quantized path guidance graph strategy, putting adjacent wound pixels of the unwrapped pixels into a queuing array to serve as to-be-unwrapped pixels, determining an unwrapping sequence according to the sizes of quantized path guidance values of the to-be-unwrapped pixels in the queuing array, unwrapping the to-be-unwrapped pixel with the maximum quantized path guidance value in the queuing array in each unwrapping step, and finally completing phase unwrapping of the all wound pixels. The phase unwrapping method of the present invention has the characteristics of simpleness, effectiveness, small calculated amount, high precision, and good robustness.

Description

technical field [0001] The invention relates to the technical field of interference synthetic aperture radar, in particular to a phase unwrapping method based on a layered quantization tracking strategy. Background technique [0002] Interferometric Synthetic Aperture Radar (INSAR) inherits the advantages of ordinary SAR imaging. Compared with traditional visible light and infrared remote sensing technology, it has all-weather and all-weather working ability, which can make up for the time and space constraints of optical sensors. The observation "blind area" caused by the limitation makes it have special applications in geological disasters and polar glacier monitoring, polar and tropical rainforest area surveying and mapping, etc. Interferometric phase unwrapping is the most critical step and difficult problem in the application of INSAR technology. It has always been the focus of INSAR data processing technology research, attracting the attention of many scholars at home ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/9023
Inventor 谢先明
Owner GUILIN UNIV OF ELECTRONIC TECH
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