• 作者： 張冀青; 游漢輝; 歐陽文勇
• 作者服務機構： 中正理工學院應用物理系
• 中文摘要： 在本文中，我們揉合了純粹相位濾波器和圓諧濾波器兩種觀念而發展出一種新的濾波器，電腦模擬之結果顯示出此種新的濾波器同時具有位移和旋轉不變性。此外，模擬的結果更顯示出此種純粹相位圓諧濾波器所產生之交互相關函數比普通之圓諧濾波器所產生的較矮小以及所佔的範圍也較小；但其所產生之自相關函數則比普通圓諧濾波器所產生的較高窄，因此純粹相位圓諧濾波器比較不容易產生誤認訊號（false alarm）以及具有較佳之從緊密之圖形中辨認出目標的能力。
• 英文摘要： The idea of the pure phase matched filter (Horner and Gianino,1984) has been incorporated in thescheme of circular-harmonic matched filtering (Hsu and Arsenault, 1982). Computer simulations haveshown that the pure phase circular-harmonic matched filter not only possesses the shift-invariant propertybut also the rotational-invariant property. In addition, simulation has demonstrated that pure phase filter-ing produces smaller, less extensive cross-correlations and sharper auto-correlations than those produced byordinary circular harmonic filtering. Consequently, pure phase circular harmonic filtering is less liable togive rise to a false alarm and its performance is better in recognizing closely placed targets.
• 中文關鍵字： Pattern recognition phase-only circular harmonic
• 英文關鍵字： --