摘要
在透镜的傅氏变换中 ,改变物与后焦面的距离可灵活调整物的频谱的空间尺寸 ,结合匹配滤波实现比例不变的相关识别 ;采用数字全息记录物波 ,免去干版的化学处理 ,可实现自动化相关识别 。
The Fourier transform of object placed between lens and its back focus plane is analyzed,it shows that its spatial frequency is adjustable by changing the distance to the back focus plane.This method can apply to scale invariant correlation.To avoid making matched filter,digital holography is introduced,and this makes correlation automatically.
出处
《激光杂志》
CAS
CSCD
北大核心
2004年第3期61-63,共3页
Laser Journal
关键词
尺度可变
傅氏变换
比例不变
相关识别
匹配滤波
Fourier transform
scale invariant
correlation recognition
digital holography
