Questions - OpenCV Q&A Forum

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2016-06-30 10:13:20 -0600 bertumen.wj

I plan to recognize paper bills by denomination but i can't think of a way to do so ... it must be invariant of illumination, rotation and scale. can i use haar or LBP ? do you have any suggestions?

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2018-03-06 04:06:18 -0600 Joshitha

Are there any ways to generate a HAAR cascade faster?

137

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2016-10-07 03:48:13 -0600 StevenPuttemans

opencv_traincascade always halts on stage 4.i

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2016-10-07 13:00:11 -0600 Neldar

Haar Training detectMultiScale does not work very well when size vary

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2016-10-31 06:00:35 -0600 StevenPuttemans

Haar classifier limitations

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2016-11-04 09:00:44 -0600 m850140

My Haarcascade classifier uses a vector file of -w=20, -h=20 for training. There are some false negative results when testing. Does increasing -w and -h improve performance of my Haarcascade classifier?

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2016-11-18 08:48:11 -0600 IlyaLupa

Is it possible to port CascadeClassifier from v 2.4.11 to 3.1.0

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2016-11-09 04:22:33 -0600 StevenPuttemans

How to do HAAR training?

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2016-12-03 04:25:47 -0600 biagio montesano

A Haar classifier for trees in satellite image: how to generate positive samples?

cvhaartraining

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2016-12-17 01:50:22 -0600 berak

openCV 2.4.9.1 sample creation works but gives error message

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2017-03-24 14:45:20 -0600 sayem48

Haar Cascade training for leaves detection

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2017-05-30 05:52:30 -0600 berak

OpenCV HaarTraining Positive images background

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2017-06-28 10:07:31 -0600 eshirima

Cascade training parameters and time

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2017-07-26 05:59:26 -0600 Raki

Issues trying to create many samples Haar training

cvhaartraining

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2017-10-06 13:52:14 -0600 holdman

Cascade Classifier - detectmultiscale does not return MatOfRect objects

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2017-12-21 20:43:46 -0600 bateringzax

Poor Cascade Training Results

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2018-02-27 12:05:24 -0600 Himanshu Walia

How to increase the quality of sampled images ? and does it affect the classifiers accuracy ?

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2018-08-01 11:51:25 -0600 graham

Cascade Training - nneg setting with prepared negative images

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2018-09-17 03:47:48 -0600 RUCasul

Haar Cascade training not working as intended

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2018-09-26 13:09:17 -0600 Ryan Lewkowicz

Simple logo haar file I created causes tons of false positives.

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2019-02-05 18:02:51 -0600 sturkmen

Barcode/label detection

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2020-08-12 10:05:13 -0600 berak

“Incremental” [face] training

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2013-08-14 04:23:35 -0600 StevenPuttemans

how to recognize different postures of hand

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2015-03-13 02:34:33 -0600 dmilne

Generating good training data for haar cascades

cvhaartraining

184

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2015-03-23 19:42:21 -0600 superlou

Haar classifiers for multiple poses

cvhaartraining

55 questions

I plan to recognize paper bills by denomination but i can't think of a way to do so ... it must be invariant of illumination, rotation and scale. can i use haar or LBP ? do you have any suggestions?

Are there any ways to generate a HAAR cascade faster?

opencv_traincascade always halts on stage 4.i

Haar Training detectMultiScale does not work very well when size vary

Haar classifier limitations

My Haarcascade classifier uses a vector file of -w=20, -h=20 for training. There are some false negative results when testing. Does increasing -w and -h improve performance of my Haarcascade classifier?

Is it possible to port CascadeClassifier from v 2.4.11 to 3.1.0

How to do HAAR training?

A Haar classifier for trees in satellite image: how to generate positive samples?

openCV 2.4.9.1 sample creation works but gives error message

Haar Cascade training for leaves detection

OpenCV HaarTraining Positive images background

Cascade training parameters and time

Issues trying to create many samples Haar training

Cascade Classifier - detectmultiscale does not return MatOfRect objects

Poor Cascade Training Results

How to increase the quality of sampled images ? and does it affect the classifiers accuracy ?

Cascade Training - nneg setting with prepared negative images

Haar Cascade training not working as intended

Simple logo haar file I created causes tons of false positives.

Barcode/label detection

“Incremental” [face] training

how to recognize different postures of hand

Generating good training data for haar cascades

Haar classifiers for multiple poses

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