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c++opencvhaar-classifiercascade-classifierlbph-algorithm

Troubles on training Haar cascade with LBP

I'm trying to train some branch logos with haar_cascade. What I've done is, I've taken 2500 squared pictures of 500 x 500 to populate the samples for opencv_createsamples. Then I generate them as:

opencv_createsamples -info 'logo.info' -vec '../logo.vec' -bg '../Negatives/bg.txt' -w 24 -h 24 -num 2500

in my logo.info I've got lines which correspond to the relative path of every picture, with a 1 0 0 500 500 meaning "there's one object between (0,0) and (500, 500)"

then I train the cascade as:

opencv_traincascade -data 'cascade/' -vec '../logo.vec' -bg '../Negatives/bg.txt' -numPos 2500 -numNeg 3019 -numStages 25 -featureType LBP -w 24 -h 24

with these parameters:

PARAMETERS:

cascadeDirName: cascade/

vecFileName: ../logo.vec

bgFileName: ../Negatives/bg.txt

numPos: 2500

numNeg: 3019

numStages: 25

precalcValBufSize[Mb] : 256

precalcIdxBufSize[Mb] : 256

stageType: BOOST

featureType: LBP

sampleWidth: 24

sampleHeight: 24

boostType: GAB

minHitRate: 0.995

maxFalseAlarmRate: 0.5

weightTrimRate: 0.95

maxDepth: 1

maxWeakCount: 100

And I've got 2 kind of errors:

  1. OpenCV Error: One of arguments' values is out of range (No components/input_variables is selected!) in cvPreprocessIndexArray, file /tmp/buildd/opencv-2.3.1/modules/ml/src/inner_functions.cpp, line 432 terminate called after throwing an instance of 'cv::Exception' what(): /tmp/buildd/opencv-2.3.1/modules/ml/src/inner_functions.cpp:432: error: (-211) No components/input_variables is selected! in function cvPreprocessIndexArray

enter image description here

...

enter image description here

this errors uses to happen when you don't give a significant difference between your num of images and your -num parameter. So, let's try to give less 100!!

well, when I've adjusted the parameters to not to go out from the array, I get the same type of output than images, but I get this error:

OpenCV Error: Assertion failed (tempNode->left) in write, file /tmp/buildd/opencv-2.3.1/modules/traincascade/boost.cpp, line 628 terminate called after throwing an instance of 'cv::Exception' what(): /tmp/buildd/opencv-2.3.1/modules/traincascade/boost.cpp:628: error: (-215) tempNode->left in function write

Aborted

I've tried:

  • Changing the destiny size of the images (24x24, 36x36...)
  • Changing the -mode parameter.
  • Trying to put a #positiveSamples < #negativeSamples and #positiveSamples > #negativeSamples

What I have to do, is training obligatory with LBP (not HAAR). Do anyone have any clue?

Thank you in advance.

Solution

  • Uninstalling and rebuilding OpenCV solved the problem.