opencv_traincascade Error - classifier/params.xml can not be opened

[mrnugget]

opencv_traincascade Error - classifier/params.xml can not be opened

[mrnugget]

Glad you found a solution :)

[rajarao47]

Hello,
I have uploaded 655 positive and 1975 negative pictures. I could generate and merge .vec file.
While executing below command;
opencv_traincascade -data classifier -vec samples.vec -bg negatives.txt -numStages 20 -minHitRate 0.999 -maxFalseAlarmRate 0.5 -numPos 1976 -numNeg 655 -w 24 -h 24 -mode ALL -precalcValBufSize 1024 -precalcIdxBufSize 1024 -featureType LBP
I am getting following error message:

OpenCV Error: Assertion failed (_img.rows * _img.cols == vecSize) in get, file /build/opencv-SviWsf/opencv-2.4.9.1+dfsg/apps/traincascade/imagestorage.cpp, line 157
terminate called after throwing an instance of 'cv::Exception'
what(): /build/opencv-SviWsf/opencv-2.4.9.1+dfsg/apps/traincascade/imagestorage.cpp:157: error: (-215) _img.rows * _img.cols == vecSize in function get

Aborted (core dumped)

I am using web server with 1Gb RAM and hope this is adequate enough to train the cascade.
I have installed opencv-2.4.9.
Positive image size used is 50 by 50
Negative image size is 100 by 100

Please help.

[MilindKgp]

@rajarao47
Try changing -w 50 -h 50 in your command.
I encountered a similar problem, changed them to image dimensions and it worked.

[jpmoraga]

Hello,

After the opencv_traincascade command I have this error message :
Parameters can not be written, because file classifier/params.xml can not be opened.

I think that the folder have to be created by hand, no ?

[EDIT] I've got it.
I was not using your tool from the default folder.
Despite for mergevec which is creating "samples" folder, opencv_traincascade is not creating "classifier" folder.

Where do you create the classifier folder? In the data folder?