Invention Grant
- Patent Title: Image registration using fourier phase matching
- Patent Title (中): 图像配准使用傅立叶相位匹配
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Application No.: US09221729Application Date: 1998-12-29
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Publication No.: US06373970B1Publication Date: 2002-04-16
- Inventor: Fang Dong , Weiguo Lu
- Applicant: Fang Dong , Weiguo Lu
- Main IPC: G06K900
- IPC: G06K900

Abstract:
A method and an apparatus for registering frames of imaging data using Fourier phase matching. Successive image frames of pixel data are processed using an image registration algorithm. Either image frames or the frames after edge detection are transformed into polar-logarithmic coordinates in the frequency domain and the phases of the Fourier transform of the resulting image representations, after inverse Fast Fourier transformation, are matched. The coordinates at the maximum phase difference are used to determine the scaling and rotation parameters needed for image frame registration. The frequency domain representation of one of the image frames is then scaled and rotated using an anti-aliasing algorithm in accordance with those parameters. The phase of the result is matched with the phase of the frequency domain representation of the other image frame to determine the translation parameters needed for image frame registration.
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