Questions - OpenCV Q&A Forum

32k

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1

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no

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2020-05-10 15:41:13 -0600 supra56

OpenCV(3.4.2) C:\projects\opencv-python\opencv\modules\highgui\src\window.cpp:356: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow

copencv2

5k

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1

answer

no

votes

2020-05-10 15:23:21 -0600 HYPEREGO

Mat to Eigen, eigen2cv and cv2eigen errors [closed]

509

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1

answer

-1

votes

2020-05-10 12:15:58 -0600 LiorA

Eyes bags removal using OpenCV ?

face

344

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no

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no

votes

2020-05-10 11:53:28 -0600 trsh

Video frames problem

Video

4k

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1

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no

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2020-05-10 09:27:32 -0600 HYPEREGO

How to automatically align an image using OpenCV in Python

python

512

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1

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no

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2020-05-10 05:03:23 -0600 Aquas

Using non-free modules in OpenCV

134

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no

answers

-1

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2020-05-09 14:27:06 -0600 jeeva

find distance of x and y in discontinuity in alignment

Overlooked

2k

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2

answers

no

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2020-05-09 10:12:14 -0600 HYPEREGO

How to align images of a known object with a 3D model of that object using opencv?

calibration

927

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1

answer

no

votes

2020-05-09 09:55:14 -0600 HYPEREGO

How does the Sobel operator handle gradients over 255?

677

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1

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no

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2020-05-09 04:59:37 -0600 kpachinger

How to draw canvas as same resolution/size across multiple android devices?

deleted

893

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no

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no

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2020-05-08 09:41:49 -0600 FilipVW

Cmake error OpenCV contrib CUDA

CUDA

5k

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no

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no

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2020-05-08 09:32:36 -0600 trsh

Where can I get "face_landmark_model.dat" for createFacemarkKazemi? [closed]

FacemarkKazemi

423

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1

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no

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2020-05-08 03:04:38 -0600 berak

Why do I miss "seamlessClone" function in openCV.js ?

seamlessClone

436

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no

answers

no

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2020-05-07 20:50:51 -0600 VigneshSuresh

Is there a package or module in python for xray scanning??? [closed]

213

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no

answers

no

votes

2020-05-07 15:40:30 -0600 trsh

Face swaping for video

Video

316

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no

answers

no

votes

2020-05-07 11:30:45 -0600 LiorA

Looking for a recent guide to build Opencv4Android.

723

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no

answers

no

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2020-05-07 08:47:59 -0600 cudawarped

CUDA DNN initialization when changing in batch size

CUDA
dnn

274

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no

answers

no

votes

2020-05-07 05:57:00 -0600 Onic009

Perspective Transform (Homography) on rgb-d images

cvWarpPerspective

1k

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no

answers

no

votes

2020-05-07 05:13:39 -0600 snehal

Remove vignetting effect [closed]

opencv
c++

238

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no

answers

1

vote

2020-05-07 04:11:45 -0600 ksenobojca

"_InputArray::isVector()" with Python data

1k

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1

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no

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2020-05-06 20:54:58 -0600 kastaa

Imprecise intrinsic/extrinsic calibration with Aruco markers

239

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no

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no

votes

2020-05-06 13:17:58 -0600 sumant

How to upgrade cv2 from 4.2.34 to 4.3.0

opencv4.3.0

967

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1

answer

no

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2020-05-06 11:45:31 -0600 cavuselami

Is opencv’s ‘dnn’ module working on jetson nano

CUDA
Nano

327

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1

answer

no

votes

2020-05-06 11:43:31 -0600 supra56

How to merge rectangles of matchTemplate?

python

455

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1

answer

no

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2020-05-06 09:43:36 -0600 berak

OpenCV.js Face landmark detection

landmarks

817

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no

answers

no

votes

2020-05-06 09:11:42 -0600 SimonKirkman

Applying external calibration parameters to an image

calibration

1k

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no

answers

no

votes

2020-05-06 08:13:15 -0600 thor2.7182

Opencv430.jar was not created after cmake [closed]

3k

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1

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no

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2020-05-06 07:02:58 -0600 supra56

/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:901

549

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1

answer

no

votes

2020-05-06 04:58:36 -0600 berak

2.4.2 DLL download for Windows

opecv2.4.2

2k

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1

answer

no

votes

2020-05-06 01:15:07 -0600 berak

29,830 questions

OpenCV(3.4.2) C:\projects\opencv-python\opencv\modules\highgui\src\window.cpp:356: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow

Mat to Eigen, eigen2cv and cv2eigen errors [closed]

Eyes bags removal using OpenCV ?

Video frames problem

How to automatically align an image using OpenCV in Python

Using non-free modules in OpenCV

find distance of x and y in discontinuity in alignment

How to align images of a known object with a 3D model of that object using opencv?

How does the Sobel operator handle gradients over 255?

How to draw canvas as same resolution/size across multiple android devices?

Cmake error OpenCV contrib CUDA

Where can I get "face_landmark_model.dat" for createFacemarkKazemi? [closed]

Why do I miss "seamlessClone" function in openCV.js ?

Is there a package or module in python for xray scanning??? [closed]

Face swaping for video

Looking for a recent guide to build Opencv4Android.

CUDA DNN initialization when changing in batch size

Perspective Transform (Homography) on rgb-d images

Remove vignetting effect [closed]

"_InputArray::isVector()" with Python data

Imprecise intrinsic/extrinsic calibration with Aruco markers

How to upgrade cv2 from 4.2.34 to 4.3.0

Is opencv’s ‘dnn’ module working on jetson nano

How to merge rectangles of matchTemplate?

OpenCV.js Face landmark detection

Applying external calibration parameters to an image

Opencv430.jar was not created after cmake [closed]

/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:901

2.4.2 DLL download for Windows

Segmentation fault when cv::Mat is constructed by Image buffer and not by VideoCapture::retreive

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