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1、西北农业学报2007,16(3):175~179ActaAgriculturaeBoreali2occidentalisSinica*基于颜色特征的加工番茄叶片氮素评价初步研究11111,2*1,2李艳,王娟,马腾飞,朱健,危常州,褚贵新(1.石河子大学农学院,新疆石河子832000;2.新疆生产建设兵团绿洲生态农业重点实验室,新疆石河子832000)摘要:利用数码相机获取加工番茄地上部分彩色图像,通过图像处理软件提取RGB及其组合的颜色特征值,同时与氮素指标叶片叶绿素含量、SPAD值、叶片含氮量及单株吸氮量作回归分析,根据统计性检验,有相当数量的颜色特征与4
2、个氮素指标呈较高的相关性,相关系数达到r=0.7以上。综合筛选出的颜色特征指标,结合地面覆盖度与氮素营养指标建立以叶片含氮量为应变量的估算模型。经模型校验,其预测值与实测值在n=15,P<0.01水平上达r=0.8以上的极显著相关。因此,可依据颜色特征参数通过建立相应的统计模型进行加工番茄叶片氮素含量的评价,进而为加工番茄氮素营养诊断提供依据。关键词:颜色特征参数;加工番茄;氮素;统计模型中图分类号:TP79;S641.2文献标识码:A文章编号:100421389(2007)0320175205APrimaryStudyonNEvaluatingofProce
3、ssingTomatoLeavesBasedonColorFeatures1111LIYan,WANGJuan,MATeng2fei,ZHUJian,1,2*1,2WEIChang2zhouandCHUGui2xin(1.CollegeofAgronomy,ShiheziUniversity,ShiheziXinjiang832000,China;2.KeyLaboratoryofOasisEcologicalAgricultureofXinjiangProductionandConstructionCorps,ShiheziXinjiang832000,Ch
4、ina)Abstract:ThisresearchintroducedCCDdigitalcameraasasensorthroughwhichprocessingtomatoplantcolorimageswerecaptured.Then,tomatocanopyandbackgroundpixelwasidentifiedbyimageprocessingsoftware.Backgroundnoisewaseliminatedsuchashotspotandshadowandsoiletc.Colorcharacteristicsofleafimage
5、ssuchasRGBwererecordedwiththeimageprocessingsoftware.Mean2while,leaves'chlorophyllcontentsandSPADvalueandleaves'nitrogenconcentrationandNabsorbedcontentwasmeasuredinLab.Canopyparametersandcolorinformationwerepairedforregressiona2nalysis.Empiricalstatisticalshowedthatasignificanthigh
6、coefficientbetweenthecolorcharacteristicsandthefournitrogennutritionparameters.Thecorrelativecoefficientwashigherthan0.7.Further2more,astatisticcorrelationmodelsweredevelopedbetweencolorcharacteristicparametersandPGCV%andnitrogennutritionparameters.Validationtestshowedthecorrelative
7、coefficientbetweentheestimatedvalueandtestingvaluewasover0.8.Therefore,thecolorcharacteristicparameterscanbeusedtoestablishstatisticmodelandevaluateprocessingtomatoleaves'nitrogennutritionstates,andforthediagnosisofNstatusofprocessingtomato.Keywords:Colorcharacteristicsparameters;Pr
8、ocessingtomato;Nitr
