I have the following directory strucure: project root/ negatives/ the negatives files ngest/ 00palmo/ 1510 positives files 01pugno/ 1431 positive files 02indice/ 1073 positive files 03v/ 1462 positive files I want to train a cascade classifier with the following script #!/bin/bash touch negatives/ls.txt ls -1 negatives|sed -e "s/ *$//">negatives/ls.txt #list of negatives images for i in ~/workspace/sm/ngest/*;do cd $i find . -name '*' -exec identify -format '%i 1 0 0 %w %h' \{\} \; >ls.txt #list of all images in question opencv_createsamples -vec $(pwd)/coll.vec -info ls.txt -bg ../../negatives/ls.txt -w 24 -h 24 -num 1550 mkdir out #the directory where we put the classifiers opencv_traincascade -data out -bg ../../negatives/ls.txt -vec coll.vec -featureType LBP \ -w 24 -h 24 -numPos 1300 -minHitRate 0.99 -precalcValBufSize 4096 -precalcIdxBufSize 4096 echo #line to separate the various iterations done However ,while I got a full classifier in 00palmo/out/cascade.xml and in 03v/out/cascade.xml,in 01pugno/out teach up to the 10thstage before stopping(the other got up to the 12th before completing with success) and 02indice/out is an empty directory after the script complete. Both the command 01pugno and 02indice terminate with the following error message ,after respectively 10 and 0 stages: POS current sOpenCV Error: Bad argument (Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file. ) in get, file /build/buildd/opencv-2.4.8+dfsg1/apps/traincascade/imagestorage.cpp, line 162 terminate called after throwing an instance of 'cv::Exception' what(): /build/buildd/opencv-2.4.8+dfsg1/apps/traincascade/imagestorage.cpp:162: error: (-5) Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file. in function get Here the link to the output of the script: https://www.dropbox.com/s/jz4nidgw1zwm8f6/out.txt?dl=0 . And here the link to an archive with the files I used for creating the classifiers: https://www.dropbox.com/s/63r71jlqpdxsbwf/files.zip?dl=0 . Where did I got it wrong?
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