Questions - OpenCV Q&A Forum

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2018-07-18 12:47:32 -0600 Philia

Choosing which image to take as input with a dialogue box.

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2018-07-21 23:52:27 -0600 sasalicat

I am learning openCV.after I set my Visual Studio,the code can not be Compiled

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2018-07-20 14:50:44 -0600 cjacquel

Superimpose a GUI on a video

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2018-07-24 06:44:15 -0600 flaviu2

Error loading CascadeClassifier

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2018-07-24 06:28:22 -0600 berak

How to use opencv videocapture in django

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2018-07-25 02:24:11 -0600 sazr

Watermarking Images: preserve quality, control opacity

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2018-07-26 19:18:15 -0600 Bhargav

color detection [closed]

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2018-07-29 23:43:04 -0600 berak

How to sort std::vector<cv::Rect>?

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2018-07-31 19:24:04 -0600 Shmall27

How do I just get pixel data when using imread? [closed]

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2018-08-01 11:11:36 -0600 user8469759

Opencv shows images totally white?

c++
opencv

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2018-08-01 16:51:11 -0600 Abhi2244

C:\ci\opencv_1512688052760\work\opencv_contrib-3.3.1\modules\face\src\lbph_faces.cpp:400: error: (-5) This LBPH model is not computed yet. Did you call the train method? in function cv::face::LBPH::predict [closed]

help

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2018-08-03 07:39:25 -0600 Oluwatosin

Open CV Face Matching on Android Device

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

I want to detect trees in image

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2018-08-06 15:55:18 -0600 cjsb

WarpPoint returns negative value

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2018-08-07 04:15:33 -0600 Manikandan Rajendran

Vegetation Change Detection [closed]

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2018-08-10 08:00:10 -0600 Samjith888

Where can i get trained haarcascade XML file to count human heads?

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2018-08-10 10:41:41 -0600 Venelyne

Python OpenCV stream to Android Studio

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2018-08-24 00:28:00 -0600 berak

Send/Receive vector <Mat> over Socket C/C++

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2018-08-21 04:34:19 -0600 kbarni

My code was compiling a month ago now it is giving so many errors

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2018-08-22 02:54:41 -0600 berak

erasing the rectangle drawn in image [closed]

95

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2018-08-22 15:58:58 -0600 LBerger

i GOT AN DLL ERROR WHILE IMPORT CV2

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2018-08-23 02:34:33 -0600 berak

Strugging with MinGW while trying to link OpenCV libraries to Eclipse

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2018-08-23 05:13:45 -0600 Kush

TypeError: R is not a numpy array, neither a scalar

267

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2018-08-23 08:15:22 -0600 Kush

Got an error in stereo vision fish eye camera calibration

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2018-08-23 08:44:40 -0600 berak

how capture frame then save it to .yuv file(422)

YUV420

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2018-08-24 04:48:01 -0600 li19960612

opencv dnn failed

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2018-08-25 00:57:58 -0600 Mohsin

AttributeError: 'NoneType' object has no attribute 'copy'

FaceRecognition

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2018-08-29 10:36:57 -0600 srinath14144

how to take points InputArray objectPoints, InputArray imagePoints could you please explain in detail with an example

solvePnP

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2018-08-29 15:06:17 -0600 Lorenzi

Can OpenCV be used to perform actions based on conditions [closed]

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2018-08-31 00:38:43 -0600 bfialkoff

29,830 questions

Choosing which image to take as input with a dialogue box.

I am learning openCV.after I set my Visual Studio,the code can not be Compiled

Superimpose a GUI on a video

Error loading CascadeClassifier

How to use opencv videocapture in django

Watermarking Images: preserve quality, control opacity

color detection [closed]

How to sort std::vector<cv::Rect>?

How do I just get pixel data when using imread? [closed]

Opencv shows images totally white?

C:\ci\opencv_1512688052760\work\opencv_contrib-3.3.1\modules\face\src\lbph_faces.cpp:400: error: (-5) This LBPH model is not computed yet. Did you call the train method? in function cv::face::LBPH::predict [closed]

Open CV Face Matching on Android Device

I want to detect trees in image

WarpPoint returns negative value

Vegetation Change Detection [closed]

Where can i get trained haarcascade XML file to count human heads?

Python OpenCV stream to Android Studio

Send/Receive vector <Mat> over Socket C/C++

My code was compiling a month ago now it is giving so many errors

erasing the rectangle drawn in image [closed]

i GOT AN DLL ERROR WHILE IMPORT CV2

Strugging with MinGW while trying to link OpenCV libraries to Eclipse

TypeError: R is not a numpy array, neither a scalar

Got an error in stereo vision fish eye camera calibration

how capture frame then save it to .yuv file(422)

opencv dnn failed

AttributeError: 'NoneType' object has no attribute 'copy'

how to take points InputArray objectPoints, InputArray imagePoints could you please explain in detail with an example

Can OpenCV be used to perform actions based on conditions [closed]

Illegal argument exception and thread issues on lockCanvas

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