Questions - OpenCV Q&A Forum

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2017-07-06 16:36:41 -0600 Fei

cv::cuda::CascadeClassifier::create() runs very slow

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2017-07-11 08:50:36 -0600 shincodex

cv::cuda::CascadeClassifier OpenCV 3.2 using data trained in OpenCV 2.4.11

cascadeclassifier

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2017-09-03 04:19:58 -0600 holdman

How to recognize specific objects

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2017-09-21 10:08:56 -0600 muhammad.umar600

Need Pre-trained classifier (xml) for Door detection

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2017-09-25 04:17:57 -0600 happy__

an exception occurs when calling getFeatureType

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

Cascade Classifier - detectmultiscale does not return MatOfRect objects

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2017-10-25 08:32:24 -0600 wpadka

My Own Cascade Classifier: Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file.

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2017-10-30 11:27:43 -0600 Machete

finger nails detection iOS

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2017-11-07 20:38:38 -0600 vbc

opencv traincascade positive and negative image

cascadeclassifier

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

Poor Cascade Training Results

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2017-12-25 19:54:20 -0600 bateringzax

High false alarm rates at step 100 for cascade training

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2018-01-24 17:12:31 -0600 loviso

How to evaluate a cascade classifier?

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2018-02-10 00:56:13 -0600 ice

Cascade Classifier

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2018-03-03 11:37:57 -0600 Jad

error while visualizing the cascade stage features

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2018-03-06 07:13:41 -0600 Jad

Is there a way to compute precision of a boosted cascade stages?

cascadeclassifier

103

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2018-03-07 09:21:15 -0600 Jad

The number of rejected windows in detectMultiScale()

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2018-04-17 13:38:55 -0600 guerreiro

error starting CascadeClassifier with xml file

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2018-05-03 12:06:23 -0600 RazeK

How to improve the performance of a Haar cascade classifier during training?

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2018-05-25 03:39:26 -0600 Jylomaki

openCV js Loading a trained model file

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2018-07-06 10:12:08 -0600 Bleach

Cascade file trained in traincascade in cuda::CascadeClassifier

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2018-08-02 09:57:12 -0600 Zizhao

Can we do model ensemble on several cascade classifiers ?

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2018-11-09 09:32:20 -0600 caiocanalli

Low accuracy of SVM on Android

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2019-01-05 10:11:41 -0600 wpadka

Haar cascade classifier - Multiple detecting same object

223

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2019-03-02 02:51:47 -0600 UnluckyTicket

Need help with training cascade classifier

130

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2019-05-07 04:20:08 -0600 lovehell

Stage threshold in cascade training

cascadeclassifier

234

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2019-06-05 03:44:48 -0600 supra56

CascadeClassifier doesn't work with cascade.xml trained by myself. It always blocked when use method detectMultiScale()

303

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2019-08-09 14:55:25 -0600 Programmerperson

OpenCV face detection results in "debug assertion failed"

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2020-04-28 17:41:28 -0600 AndrakoValle

How to train more accurate Haar Cascades?

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2020-06-24 23:05:05 -0600 neel19

I am getting this error: Invalid HAAR feature (expected: 'rw.r.x + rw.r.width <= W'), where > 'rw.r.x + rw.r.width' is 22 > must be less than or equal to > 'W' is 16

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2013-07-12 01:29:27 -0600 Ken Moore

97 questions

cv::cuda::CascadeClassifier::create() runs very slow

cv::cuda::CascadeClassifier OpenCV 3.2 using data trained in OpenCV 2.4.11

How to recognize specific objects

Need Pre-trained classifier (xml) for Door detection

an exception occurs when calling getFeatureType

Cascade Classifier - detectmultiscale does not return MatOfRect objects

My Own Cascade Classifier: Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file.

finger nails detection iOS

opencv traincascade positive and negative image

Poor Cascade Training Results

High false alarm rates at step 100 for cascade training

How to evaluate a cascade classifier?

Cascade Classifier

error while visualizing the cascade stage features

Is there a way to compute precision of a boosted cascade stages?

The number of rejected windows in detectMultiScale()

error starting CascadeClassifier with xml file

How to improve the performance of a Haar cascade classifier during training?

openCV js Loading a trained model file

Cascade file trained in traincascade in cuda::CascadeClassifier

Can we do model ensemble on several cascade classifiers ?

Low accuracy of SVM on Android

Haar cascade classifier - Multiple detecting same object

Need help with training cascade classifier

Stage threshold in cascade training

CascadeClassifier doesn't work with cascade.xml trained by myself. It always blocked when use method detectMultiScale()

OpenCV face detection results in "debug assertion failed"

How to train more accurate Haar Cascades?

I am getting this error: Invalid HAAR feature (expected: 'rw.r.x + rw.r.width <= W'), where > 'rw.r.x + rw.r.width' is 22 > must be less than or equal to > 'W' is 16

The elusive road to LBP cascade training... help!

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