基于矩不变散焦原理的脉搏波形提取  

Pulse Wave Acquisition Based on Defocus and Moment Invariant

作　　者：李永平[1] 张爱华[1] 郭卫刚[1] 

机构地区：[1]兰州理工大学电气与信息工程学院,兰州730050

出　　处：《科学技术与工程》2008年第16期4550-4553,4559,共5页Science Technology and Engineering

摘　　要：由于动态图像各帧散焦程度不同,提出应用散焦测距原理提取脉搏波形的方法。由于图像的矩在图像分割前后具有不变性,基于此原理采用矩保持法求取与散焦图像弥散圆半径成比例的量值。依据散焦测深公式求出反映脉搏跳动强度变化的数据,提取脉搏波形。The method of acquiring pulse wave is proposed based on depth from defocus due to the difference of defocus on each frame in image sequences.Based on the principle that image square is invariable after image segmentation.The value of which in proportion to the radius of dispersion circle on defocus images is acquired by applying image square maintenance principle.Data reflecting pulse intension are acquired by formula of depth from defocus and the pulse wave is drawn.

关 键 词：散焦测距 矩保持 深度信息 脉搏波形 

分 类 号：TP753[自动化与计算机技术—检测技术与自动化装置]