高光谱成像结合BiTCN-SA的马铃薯晚疫病早期识别

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Abstract：Earlyidentificationofpotatolateblightiscrucialforcontrollingitsdevelopment.Tofullutilizetheinter-band characteristicinformationofhyperspectraldataandimprovetheaccuracyofmodels intheearlyidentificationofpotatolate blight，this study proposesa potato late blightearlyidentification model （BiTCN-SA）basedona Bidirectional Temporal Convolutional Network （BiTCN）fused witha Self-Atention （SA）mechanism.The BiTCNcaptures inter-bandcorrelation features through forwardand backward convolution branches，and fully exploits the asociations betweenprecedingand subsequent bands.The self-atention mechanism dynamically assigns importance weights to different bands，enhancing the contributionofkeybands tomodelclasification.TheBiTCN-SAmodel integratesself-atentionwith BiTCNtoachievea combinationoflocalconvolutionalfeaturesandglobalatention weights inboth directions，realizingdualfeatureextraction and improving the model's identificationaccuracy.This studycollectshyperspectral potato leaf data from three stages （healthy，asymptomatic，andearlysymptomatic），conductsmodelingandanalysis.Itvrifiesthesuperiorityofteroosed model bycomparing machine learning methods such as SVM and RF，and deep learning models including CNN，LSTM， TCN，and BiTCN.Theresults show thatthe BiTCN-SA model converges fasterthan standalone TCNand BiTCN models， withsignificantlyimprovedaccuracy.Itdemonstratesstronger featureextractioncapabilitythanothermachinelearningand deep learningmethods，achieving an overall accuracyof 98% and an identification rate of 96% forasymptomatic diseased leaves.Thismethodfullyutilizesdeepinter-band informationfromhyperspectraldataanditsidentificationrateshows substantial improvement over other machine learning and dep learning methods，providing technicalsupport forearly warning and control of potato late blight.

Keywords：Potatolate blight;hyperspectralimaging;earlyidentification;bidirectionaltemporalconvolutionalnetwork;selfattentionmechanism; feature extraction

马铃薯是全球第四大重要的粮食作物，我国是世界上马铃薯种植面积最大的国家，而由致病疫霉引起的马铃薯晚疫病是一种毁灭性病害[]，其爆发性强、蔓延速度快[2]，严重威胁我国粮食安全。（剩余11994字）