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secondary circle 【天文學】第二圈,副圈。

secondary coil

The technology of identification based on iris is researched in the article , the key point of the technology is the iris characteristic acquisition and recognition , therefore based on the iris image texture characteristic , using the wavelet transforms to get the characteristic of iris image , a new method named zero - crossing detection and secondary circle coding is used in the article 本文研究的就是用虹膜進行身份識別的技術,該技術的關鍵是虹膜特征提取和識別。基于虹膜圖像的紋理特征,利用小波變換來提取虹膜圖像的特征,本文提出了基于小波過零檢測的循環二次編碼的方法。