长春理工大学学报(自然科学版)
長春理工大學學報(自然科學版)
장춘리공대학학보(자연과학판)
JOURNAL OF CHANGCHUN UNIVERSITY OF SCIENCE AND TECHNOLOGY(NATURAL SCIENCE EDITION)
2015年
2期
103-107
,共5页
车牌%字符识别%LabVIEW IMAQ
車牌%字符識彆%LabVIEW IMAQ
차패%자부식별%LabVIEW IMAQ
LabVIEW%The license plate%Character%recognize
车牌识别是指通过图像处理、模式识别和统计分析等方法从实时车辆图像中提取车牌字符信息,从而确定车辆身份的技术。通过对车牌识别中的图像采集与处理、车牌定位、字符分割和字符识别这4个核心技术的研究,在LabVIEW平台上,利用IMAQ强大的图像处理功能,对USB摄像机获得的实现车牌图像进行格式转换,灰度变换以及二值变换等预处理,将边缘提取与图像投影两种方法相结合精确定位车牌,最后根据特征匹配的方法识别出车牌字符信息。结果表明,基于IMAQ程序可以很好的对车牌图像进行处理,并在平均时间为3s左右情况下完成对车牌字符的识别。
車牌識彆是指通過圖像處理、模式識彆和統計分析等方法從實時車輛圖像中提取車牌字符信息,從而確定車輛身份的技術。通過對車牌識彆中的圖像採集與處理、車牌定位、字符分割和字符識彆這4箇覈心技術的研究,在LabVIEW平檯上,利用IMAQ彊大的圖像處理功能,對USB攝像機穫得的實現車牌圖像進行格式轉換,灰度變換以及二值變換等預處理,將邊緣提取與圖像投影兩種方法相結閤精確定位車牌,最後根據特徵匹配的方法識彆齣車牌字符信息。結果錶明,基于IMAQ程序可以很好的對車牌圖像進行處理,併在平均時間為3s左右情況下完成對車牌字符的識彆。
차패식별시지통과도상처리、모식식별화통계분석등방법종실시차량도상중제취차패자부신식,종이학정차량신빈적기술。통과대차패식별중적도상채집여처리、차패정위、자부분할화자부식별저4개핵심기술적연구,재LabVIEW평태상,이용IMAQ강대적도상처리공능,대USB섭상궤획득적실현차패도상진행격식전환,회도변환이급이치변환등예처리,장변연제취여도상투영량충방법상결합정학정위차패,최후근거특정필배적방법식별출차패자부신식。결과표명,기우IMAQ정서가이흔호적대차패도상진행처리,병재평균시간위3s좌우정황하완성대차패자부적식별。
The license plate recognition extracts license plate characters through image processing, pattern recognition and statistical analysis,to determine the vehicle identification technology.Through the research of the four key technolo-gy of collecting and processing the image,locating the license plate,separating and identifying the character on the li-cense plate recognition.We offer to process real time license plate image first by converting format, transform into gray and binarization,which is collected by USB camera,and locate license plate by combining with edge extraction and im-age projection. Finally recognize the character information of the license plate based on the method of feature matching, using powerful image processing function of IMAQ on the platform of LabVIEW. The results show that, the license plate image can be well processed by the procedure based on IMAQ, and the average time of discerning the license plate character is about 70ms.