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Automatic splicing and fusing method for digital holographic sub-aperture phase diagrams

A digital holographic and automatic splicing technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as low resolution, small recording range, and limited digital holographic applications, so as to improve registration accuracy and high stability , Avoid the effect of manual participation

Pending Publication Date: 2021-07-16
CHINA JILIANG UNIV
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Problems solved by technology

Compared with traditional holography, digital holography can quantitatively analyze the structural information of three-dimensional or phase objects, but due to the limited pixel size and photosensitive area of ​​photoelectric conversion devices in the recording process, the recorded digital hologram has a small recording range and Low resolution severely limits the application of digital holography in the field of large-scale high-precision measurement

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  • Automatic splicing and fusing method for digital holographic sub-aperture phase diagrams
  • Automatic splicing and fusing method for digital holographic sub-aperture phase diagrams
  • Automatic splicing and fusing method for digital holographic sub-aperture phase diagrams

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Embodiment Construction

[0039] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0040] The embodiment of the present invention is based on an automatic splicing and fusion method of digital holographic sub-aperture phase maps, which improves the splicing efficiency and accuracy of digital holographic sub-aperture phase maps, and realizes automatic splicing and fusion of digital holographic sub-aperture phase maps. signal figure 1 , which is the phase diagram of two adjacent sub-apertures of digital holography input by the method of the present invention. signal figure 2 , which is the result of phase stitching of two adjacent sub-apertures of digital holography according to the present invention. Correspondingly, the method of the present invention only needs to input the phase diagrams of two sub-apertures, and can automatically realize the splicing of digital holographic sub-apertures.

[0041] Another aspect of the present...

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Abstract

The invention discloses an automatic splicing and fusing method for digital holographic sub-aperture phase diagrams, and the method comprises the steps: carrying out the rough matching of two adjacent sub-aperture phase diagrams through a phase correlation algorithm, and obtaining an initial relative position and an initial overlapping region between the two sub-aperture phase diagrams; according to a Harris operator, respectively carrying out corner detection on the initial overlapping region of the two sub-aperture phase diagrams, and carrying out corresponding corner matching and mismatching point pair elimination to obtain an optimal Harris corner matching point pair; taking the obtained optimal Harris corner matching point pair as a center, respectively selecting corresponding sub-image blocks in the two sub-aperture phase diagrams, and calculating to obtain an optimal matching point pair and corresponding offset according to a full matching search algorithm (FS); and translating the two sub-aperture phase diagrams according to the two sub-aperture phase diagrams, the optimal matching point pair and the corresponding offset, and carrying out phase fusion on an overlapping region to realize automatic splicing fusion of the digital holographic sub-aperture phase diagrams.

Description

technical field [0001] The invention relates to an automatic splicing and fusion method of digital holographic sub-aperture phase diagrams, which can be used for automatic splicing and fusion when the digital holographic technology detects and reproduces the three-dimensional shape of the surface of a measured object. Background technique [0002] Digital holography technology is a non-contact, high-precision measurement technology, which is widely used in the measurement of three-dimensional information on the surface of objects, and is an important research content in the field of precision measurement. Compared with traditional holography, digital holography can quantitatively analyze the structural information of three-dimensional or phase objects, but due to the limited pixel size and photosensitive area of ​​photoelectric conversion devices in the recording process, the recorded digital hologram has a small recording range and The low resolution severely limits the app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T7/187G06T7/33
CPCG06T3/4038G06T7/187G06T7/33G06T2207/20164G06T2207/20221
Inventor 刘维谢中思郝玲徐佳男孔明王道档赵军郭天太许新科刘璐
Owner CHINA JILIANG UNIV
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