A novel virtual four-ocular stereo measurement system based on single high speed camera is proposed for measuring double beating wings of a high speed flapping insect. The principle of virtual monocular system consist...A novel virtual four-ocular stereo measurement system based on single high speed camera is proposed for measuring double beating wings of a high speed flapping insect. The principle of virtual monocular system consisting of a few planar mirrors and a single high speed camera is introduced. The stereo vision measurement principle based on optic triangulation is explained. The wing kinematics parameters are measured. Results show that this virtual stereo system not only decreases system cost extremely but also is effective to insect motion measurement.展开更多
在检测误判率足够低的前提下,检测速度通常是制约视觉检测系统在线应用的关键因素.鉴于PCB图像具有大面积绿色阻焊膜且目标组件的位置相对固定的特点,本文提出了一种以区域分割思想为基础的多通道检测技术,用以提高PCBA视觉检测系统的...在检测误判率足够低的前提下,检测速度通常是制约视觉检测系统在线应用的关键因素.鉴于PCB图像具有大面积绿色阻焊膜且目标组件的位置相对固定的特点,本文提出了一种以区域分割思想为基础的多通道检测技术,用以提高PCBA视觉检测系统的检测速度.首先以单个组件的区域为基本单元,将PCB图像划分为多个独立小区域;然后将系统设置成多个同步检测的通道,并将分割好的小区域图像按照预先设定的顺序分别同时送入不同的通道内进行同步检测;最后基于虚拟仪器开发平台L abV IEW及其视觉开发工具IM AQ V is ion开发出了PCBA 10通道视觉检测系统.通过实验证实,折算之后,10通道系统的单片元件最大检测时间是12.5 m s,内存消耗量是205.0 KB;100通道系统的单片元件最大检测时间是1.25 m s,内存消耗量是2 050 KB.展开更多
基金The work was supported by the National Science Fund for Distinguished Young Scholars of China under Grant No. 50125518.
文摘A novel virtual four-ocular stereo measurement system based on single high speed camera is proposed for measuring double beating wings of a high speed flapping insect. The principle of virtual monocular system consisting of a few planar mirrors and a single high speed camera is introduced. The stereo vision measurement principle based on optic triangulation is explained. The wing kinematics parameters are measured. Results show that this virtual stereo system not only decreases system cost extremely but also is effective to insect motion measurement.
文摘在检测误判率足够低的前提下,检测速度通常是制约视觉检测系统在线应用的关键因素.鉴于PCB图像具有大面积绿色阻焊膜且目标组件的位置相对固定的特点,本文提出了一种以区域分割思想为基础的多通道检测技术,用以提高PCBA视觉检测系统的检测速度.首先以单个组件的区域为基本单元,将PCB图像划分为多个独立小区域;然后将系统设置成多个同步检测的通道,并将分割好的小区域图像按照预先设定的顺序分别同时送入不同的通道内进行同步检测;最后基于虚拟仪器开发平台L abV IEW及其视觉开发工具IM AQ V is ion开发出了PCBA 10通道视觉检测系统.通过实验证实,折算之后,10通道系统的单片元件最大检测时间是12.5 m s,内存消耗量是205.0 KB;100通道系统的单片元件最大检测时间是1.25 m s,内存消耗量是2 050 KB.