Questions - OpenCV Q&A Forum

373

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

“Incremental” [face] training

366

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no

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2020-03-10 12:59:21 -0600 dunnoguy

How to live stream to a website using cv2 library

614

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2019-03-03 03:44:29 -0600 LBerger

How do I evaluate the performance of Haar Cascade in test data ? How do we classify the set of images in different categories using Haar Cascade, just like CNN does?

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2

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

Barcode/label detection

195

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

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

230

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

Haar Cascade training not working as intended

306

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2018-08-04 19:39:49 -0600 m7ammad7assan

I want to detect trees in image

100

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

Cascade Training - nneg setting with prepared negative images

557

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

Are there any ways to generate a HAAR cascade faster?

160

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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 ?

133

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

Poor Cascade Training Results

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

Cascade Classifier - detectmultiscale does not return MatOfRect objects

301

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

Issues trying to create many samples Haar training

cvhaartraining

168

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

Cascade training parameters and time

473

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

OpenCV HaarTraining Positive images background

1k

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no

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

Haar Cascade training for leaves detection

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

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

cvhaartraining

155

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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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2016-11-04 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?

2k

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

Haar classifier limitations

342

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

Haar Training detectMultiScale does not work very well when size vary

137

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

opencv_traincascade always halts on stage 4.i

283

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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?

1k

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1

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no

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2016-05-26 06:47:32 -0600 StevenPuttemans

Haar cascade training

1k

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2016-05-21 14:42:50 -0600 slnowak

Training cascade classifier: Can not get new positive sample

182

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2016-05-14 13:17:15 -0600 iamnikolie

Train Haar classifier faster

127

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no

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2016-03-03 09:04:53 -0600 DD

opencv_traincascade.exe crashes without an errormessage

180

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1

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2016-03-03 04:54:00 -0600 StevenPuttemans

55 questions

“Incremental” [face] training

How to live stream to a website using cv2 library

How do I evaluate the performance of Haar Cascade in test data ? How do we classify the set of images in different categories using Haar Cascade, just like CNN does?

Barcode/label detection

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

Haar Cascade training not working as intended

I want to detect trees in image

Cascade Training - nneg setting with prepared negative images

Are there any ways to generate a HAAR cascade faster?

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

Poor Cascade Training Results

Cascade Classifier - detectmultiscale does not return MatOfRect objects

Issues trying to create many samples Haar training

Cascade training parameters and time

OpenCV HaarTraining Positive images background

Haar Cascade training for leaves detection

openCV 2.4.9.1 sample creation works but gives error message

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

Is it possible to port CascadeClassifier from v 2.4.11 to 3.1.0

How to do HAAR training?

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?

Haar classifier limitations

Haar Training detectMultiScale does not work very well when size vary

opencv_traincascade always halts on stage 4.i

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?

Haar cascade training

Training cascade classifier: Can not get new positive sample

Train Haar classifier faster

opencv_traincascade.exe crashes without an errormessage

Reference footage for people

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