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1、2009年8月北京航空航天大学学报August2009第35卷第8期JournalofBeijingUniversityofAeronauticsandAstronauticsVol.35No.8定量胶体金试剂条浓度检测方法王ι旧;郑德智樊尚春(北京航空航天大学仪器科学与光电工程学院,北京100191)摘要:肢体金免疫层析浓度检测方法主要利用比色原理,当被检测液体中抗原与试剂条上抗体反应后,试剂条上检测区域颜色发生变化,与标准比色卡进行比较,即可定性分析浓度.目前肢体金试剂条大多为半定量测量,使其应用范围受到限制.采用
2、一种基于DSP(DigitalSignalProcessor)的嵌入式图像处理系统,利用CMOS(ComplementaryMetalOxideSemi•conductor)图像传感器获取定量肢体金试剂条图像信息,根据图像特点进行Bayer变换、白平衡处理,提取出图像特征量条纹强度,建立图像特征条纹强度与样本浓度值的函数关系,实现被检测液体浓度的精确测量.与其它方法相比,具有精度高、检测速度快等优点.实验结果表明:基于DSP硬件平台的定量肢体金试剂条浓度检测精度可达到土5%,重复性误差达到:t1%,具有一定的应用价值.
3、关键词:肢体颗粒;图像传感器;图像处理;浓度中图分类号:TN911.73文献标识码:A文章编号:1001-5965(2009)08-0942-04DetectingmethodofquantitativecolloidalgoldteststripconcentrationWangShuaiZhengDezhiFanShangchun(SchoolofInstrumentScienceandOpto-electronicsEngineering,BeijingUniversityofAeronauticsandAstr
4、onautics,Beijing100191,China)Abstract:Colloidalgoldimmunochromatographyassayconcentrationdetectingmethodusesthecolorimetricprinciple如whichcompareswiththecolorstandardcardbyusingcolorvarietaldetectionarea,afterareac•tionbetweenantigenofthemeasuredliquidandantibod
5、yofthereagentstrip.It'saqualitativeconcentrationa•nalysis.Atpresent,colloidalgoldteststripismostlysemi-quantitative,whichtendstolimititsuse.Itadopt•edanembeddedimageprocessingsystemwhichbasedonthedigitalsignalprocessor(DSP).Theimageinfor•mationofthequantitativec
6、olloidalgoldteststripwassampledbytheimagesensorcomplementarymetaloxidesemiconductor(CMOS),dealtbyBayertransformation,whitebalanceprocessing,imagefeatureinformationoffringeintensityextraction,andthenestablishedthefunctionalrelationbetweenimagefeatureinformationof
7、fringeintensityandsampleconcentration,soitcanrealizeaccuratemeasurement.Comparedwithothermeth•ods,ithasadvantagesofhighprecision,fastinspectionspeedandsoon.Theresultsshowthatthemethodofquantitativecolloidalgoldteststripconcentrationdetectionhasupperappliedvalue,
8、whichbasedontheDSPhardwareplatform,itprecisioncanbeupto:t5%,repeatabilityerrorreaches:t1%.Keywords:colloids-micellesjimagesensorsjimageprocessingjconcentration胶体金试剂条法