c++ - OpenCV 2.4.9 - Traincascade problems -

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i use osx 10.11. i'm new opencv , i'm trying train simple (and surely weak) cascade classifier detect object. have read several answers, posts, guide, docs , tutorials cascade classifier have problems. referred guide:

guide

that follow opencv doc. have 8 jpg interest object , 249 background images (i know it's poor dataset it's attempt).

when call opencv_createsamples noticed author of guide generate 1500 samples , it. means generate 1500 samples 8 positive images?

perl bin/createsamples.pl positives.txt negatives.txt samples 1500 "opencv_createsamples -bgcolor 0 -bgthresh 0 -maxxangle 1.1 -maxyangle 1.1 maxzangle 0.5 -maxidev 40 -w 80 -h 40"

note in sample folder have 7 img*.jpg.vec file. not 1500? after when call:

g++ `pkg-config --libs --cflags opencv` -i. -o mergevec mergevec.cpp cvboost.cpp cvcommon.cpp cvsamples.cpp cvhaarclassifier.cpp cvhaartraining.cpp -lopencv_core -lopencv_calib3d -lopencv_imgproc -lopencv_highgui -lopencv_objdetect

i have errors because missing "opencl" "appkit" "quartzcore" "qtkit" "cocoa". can retrieve these? i'm tried continue , generate samples.vec file.

find ./samples -name '*.vec' > samples.txt ./mergevec samples.txt samples.vec

finally train classifier code:

opencv_traincascade -data classifier -vec samples.vec -bg negatives.txt -numstages 20 -minhitrate 0.999 -maxfalsealarmrate 0.5 -numpos 1000 -numneg 249 -featuretype lbp -w 80 -h 40 -precalcvalbufsize 2048 -precalcidxbufsize 4096

after read posts i've choosen -numpos smaller 1500 samples generated (but they?). when start training, 1 stuck in situation:

terminal

what learnt when tried follow same (and other) tutorial:

  • yes, createsamples turns single positive many. *.vec file contains many of them in 1 file. if display *.vec file using opencv_createsamples, can page through them arrow keys (i think).

  • you need mergevec program, combines *.vec files one, needed training. i'm using windows, have no idea how mac stuff.

  • the output of opencv_traincascade seems indicate found thousand images in samples.vec. if don't have mergevec, assume using prebuild samples.vec file.

  • what mean "stuck in situation"? no more output, no crash? sometimes, training takes hours.


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