摘要
利用单目多视角摄像装置直接获取5个不同视角的珍珠表面图像,对其进行图像预处理并按照成像规则进行融合拼接,从融合拼接的珍珠全景图像中提取出珍珠表面颜色、光泽度及均匀度等特征参数;依据与国家标准相一致的判断指标与相应的检测算法来识别和检测珍珠品质。实验结果表明,设计的基于单目多视角机器视觉装置能保证在一个统一的颜色系统中一次获得珍珠整个球体表面的图像,可实时完成珍珠的颜色、光泽度及均匀度等外观品质指标的视觉检测与分类,各个指标的检测精度均达到了80%以上。
In order to evaluate pearl color and luster,a monocular multi-view imaging device was designed by placing a HD camera in front of a symmetric bucket cavity body which constituted by the multiple pieces of plane mirror.The device could achieve the pearl's surface images taken from five different perspectives.Then image processing was used to fuse the five pearl images and achieve a new image which contained the pearl's whole surface.After that,a pearl's region was divided into highlight areas and bright area,then the characteristic parameter of color was picked-up from bright area and the characteristic parameter of luster from highlight area.Finally,the feature fusion was used to determine the quality of the pearl.The experimental results showed that the monocular multi-view machine vision device could obtain the entire surface of the pearl in the same color system,and accomplish the real-time detection and grading for pearl's color,luster and uniformity.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2014年第4期276-283,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(61070134)
关键词
珍珠
品质检测
机器视觉
单目多视角
图像融合
Pearl
Quality detection
Machine vision
Monocular multi-view
Image fusion