Comparison of the performance of three types of correlation filters for rotational-invariant pattern recognition

摘要

In this paper, comparison of the performance of three types of correlation filters: linear high-pass circular harmonic filter (LHPCHF), ideal high-pass circular harmonic filter (IHPCHF), and wavelet transform circular harmonic filter (WTCHF), are presented. These filters combining 2D symmetrical edge detection filter and circular harmonic filter (CHF) are used to perform shift- and rotational-invariant optical pattern recognition.