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how can I solve this error?

asked 2018-07-06 12:23:42 -0600

delpozo95 gravatar image

updated 2018-07-07 03:54:59 -0600

berak gravatar image

I´m triying to create a vector using this opencv_createsamples -info info/info.lst -num 1330 -w 20 -h 20 -vec positives.vec in cmd.

I have 1350 pictures in info and info.lst has this structure: picturename.jpg objects x1 y1 x2 y2 (x and y are the first and the last point of the rectangle label).

But I get this problem: OpenCV Error: Assertion failed (0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows) in cv::Mat::Mat, file C:\build\master_winpack-build-win64-vc15\opencv\modules\core\src\matrix.cpp, line 538

Y use -show and i think that the problem is that mi pictures has 600x480 pixels and when any label has any point of the rectangle higher than 350, i get the same problem mensaje.

Anyone know any solution in order to keep my labels?

Sorry for my english. Thanks for your time.

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In my opinion, it is far easier to train a neural network (for example mobilenet ssd using for instance TensorFlow) to perform object detection than try to train a cascade of classifiers. The model can then be loaded with OpenCV.

Eduardo gravatar imageEduardo ( 2018-07-07 06:22:03 -0600 )edit

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answered 2018-07-07 03:48:56 -0600

berak gravatar image

please have another look at the tutorial

most likely, your txt file has the wrong structure. try with lines like:

/complete/path/to/img  numrects x y w h  x y w h ...

(you need to specify, how many rects there are, and those are x y w h, NOT x1 y1 x2 y2)

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Yes, this is my problem. Thanks.

delpozo95 gravatar imagedelpozo95 ( 2018-07-08 10:58:06 -0600 )edit

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Asked: 2018-07-06 12:23:42 -0600

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Last updated: Jul 07 '18