Questions - OpenCV Q&A Forum

865

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2020-10-13 04:33:44 -0600 berak

I'm getting the following error while using OpenCV

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2020-07-28 06:51:26 -0600 berak

TypeError: Expected Ptr<cv::UMat> for argument 'src'

271

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2020-07-27 18:08:39 -0600 mdaccrim97

opencv_traincascade keeps core dumping [closed]

336

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-1

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2020-06-28 10:54:26 -0600 Dragonfly Robotics

OpenCV Training Custom Haar Cascade with Python 3

135

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2020-06-23 12:06:19 -0600 supra56

LBPHFaceRecognizer slows down processes

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2020-05-21 02:45:09 -0600 berak

Can you help me with nail detection please?

objectdetection

357

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

How to train more accurate Haar Cascades?

384

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no

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2020-04-06 22:01:23 -0600 LearningCV

training haar cascade with single positive sample

478

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2

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2020-03-29 04:56:40 -0600 ComputerVisionary

Train cascade classifier for game screenshots

cascadeclassifier

423

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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

316

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1

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no

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2019-11-24 12:12:33 -0600 berak

cascade training... help!

traincascade

504

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2020-03-29 05:51:41 -0600 ComputerVisionary

Cannot detect cars

166

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2019-09-05 13:41:55 -0600 vito95

how does opencv handle rectangles feature of haar cascade classifier?

346

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2019-08-20 07:37:10 -0600 LBerger

Not able to identify the images correctly

407

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2020-03-29 06:08:41 -0600 ComputerVisionary

Training Haar cascades for face detection..

246

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no

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

Need help with training cascade classifier

1k

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1

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-2

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2019-01-07 11:09:29 -0600 berak

I'm trying to run a face recognition program in python using OpenCV but I'm getting the following error which I'm unable to resolve. Any help is greatly appreciated

FaceRecognizer

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2018-12-19 08:16:51 -0600 oja

Hey guys I am doing a face recognition project using LBPHFaceRecognizer the problen is that for few images (test images) the model is recognizing and for few images it is giving this error: (-215:Assertion failed) s >= 0 in function 'cv::setSize' [closed]

FaceRecognition

266

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

Haar Cascade training not working as intended

471

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1

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2018-08-16 11:56:40 -0600 yoggiee

lbp cascade training to detect traffic signs [closed]

428

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1

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2018-07-24 04:09:01 -0600 StevenPuttemans

Error while opencv_traincascade

213

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1

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no

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

how can I solve this error?

train_cascade

897

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no

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no

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2018-05-07 12:17:49 -0600 karimbgmail

Problem with Haar cascade

Haar
cascade

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no

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no

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

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

2k

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no

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-1

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2018-05-02 17:18:03 -0600 mssm1996

OpenCV Detecting Traffic Light green signal

512

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1

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2018-05-01 05:28:04 -0600 berak

Face Prediction is invalid in Opencv Python

324

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1

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no

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2018-04-19 03:39:32 -0600 StevenPuttemans

Opencv_traincascade training too fast?

921

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1

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no

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2018-04-19 03:47:53 -0600 StevenPuttemans

opencv traincascade on windows

721

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1

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no

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2018-04-16 00:35:24 -0600 kapil goyal

aborted core dumped :NEG current samples: 7250 terminate called after throwing an instance of 'std::out_of_range' what(): basic_string::substr: __pos (which is 140) > this->size() (which is 11) Aborted (core dumped)7254

405

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2018-04-03 12:45:05 -0600 Philia

222 questions

I'm getting the following error while using OpenCV

TypeError: Expected Ptr<cv::UMat> for argument 'src'

opencv_traincascade keeps core dumping [closed]

OpenCV Training Custom Haar Cascade with Python 3

LBPHFaceRecognizer slows down processes

Can you help me with nail detection please?

How to train more accurate Haar Cascades?

training haar cascade with single positive sample

Train cascade classifier for game screenshots

How to live stream to a website using cv2 library

cascade training... help!

Cannot detect cars

how does opencv handle rectangles feature of haar cascade classifier?

Not able to identify the images correctly

Training Haar cascades for face detection..

Need help with training cascade classifier

I'm trying to run a face recognition program in python using OpenCV but I'm getting the following error which I'm unable to resolve. Any help is greatly appreciated

Hey guys I am doing a face recognition project using LBPHFaceRecognizer the problen is that for few images (test images) the model is recognizing and for few images it is giving this error: (-215:Assertion failed) s >= 0 in function 'cv::setSize' [closed]

Haar Cascade training not working as intended

lbp cascade training to detect traffic signs [closed]

Error while opencv_traincascade

how can I solve this error?

Problem with Haar cascade

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

OpenCV Detecting Traffic Light green signal

Face Prediction is invalid in Opencv Python

Opencv_traincascade training too fast?

opencv traincascade on windows

aborted core dumped :NEG current samples: 7250 terminate called after throwing an instance of 'std::out_of_range' what(): basic_string::substr: __pos (which is 140) > this->size() (which is 11) Aborted (core dumped)7254

Detecting Brain Tumor?

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