Constancy characteristics of antetype matching in Fourier transform

摘要

The paper proposes an antetype matching algorithm in Fourier Transform domain (AMFT), which is robust against geometrical changes in time domain. We present several methods to eliminate the geometry interferences induced by the limited changes of objects, such as shift, amplitude, scale, rotation and their combination in time domain: (1) Using the Time-shifting property of Fourier Transform. To eliminate the time shifting of signal, (2) normalizing the disturbance out of signal intensity with auto-correlativity operation, (3). The scale factor in time-domain being transformed to time shifting with semi-logarithm operation, (4) constructing a energy distribution function to keep the correlation between the antetype and a target and eliminate the interference induced by rotating the larget. The experimental results show that the geometrical changes of targets can efficiently be rid of during matching processes with a constant prototype using this algorithm.