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29,830 questions
Tagged
2k
views
1
answer
no
votes
2020-09-14 02:19:42 -0600
berak
Where to find opencv_createsamples.exe in windows
copencv
python
opencv-windows
opencv_on_windows
86
views
no
answers
no
votes
2020-09-12 22:59:44 -0600
jc508
Help to choose an opencv module/method
opencv
python
array
1k
views
1
answer
2
votes
2020-09-13 04:17:10 -0600
berak
why the order of colors in drawChessboardCorners() changes?
calibrateCamera
chessboard
2k
views
2
answers
no
votes
2020-09-16 04:01:10 -0600
cudawarped
How Can I use CUDA in Python for fastNlMeanDenosingColored?
gpu
CUDA
denoising
python
534
views
no
answers
1
vote
2020-09-12 00:29:22 -0600
freeheartsz
how to use yolov3 with opencv.js in browser
OpenCV.js
Yolov3
809
views
no
answers
no
votes
2020-09-11 15:06:37 -0600
ConnorM
Triangulation - Combining Data from Multiple Cameras
camera
calibration
triangulation
stereo
multiple
1k
views
1
answer
no
votes
2020-09-22 10:41:03 -0600
ConnorM
Chessboard Calibration DBL_EPSILON error
camera
calibration
stereo
chessboard
1k
views
no
answers
no
votes
2020-09-11 13:10:58 -0600
berak
People Counter with Raspberry Pi 4 on Vertical View
OpenCV-2.4.9
raspberrypi4
footfall
285
views
no
answers
no
votes
2020-09-11 11:13:40 -0600
poornapragna
When to use fisheye camera calibration?
calibration
camera
cameraCalibration
fisheye
lens
lensdistortion
586
views
no
answers
no
votes
2020-09-11 09:23:10 -0600
berak
Why VideoCapture fails to open Aravis Camera?
CaptureVideo
opencv
camera
758
views
1
answer
no
votes
2020-09-11 02:28:44 -0600
berak
SystemError: <class 'cv2.UMat'> returned NULL without setting an error
UMat
perspectiveTransform
15k
views
no
answers
no
votes
2020-09-10 22:12:36 -0600
NiftyNev
cap_msmf.cpp (435) [ WARN:0] on cv2.VideoCapture break
cv2.videocapture
readwebcam
break
cap_msmf.cpp
253
views
no
answers
no
votes
2020-09-10 11:42:21 -0600
bixaw67773
checkerboard for camera calibration - does size matter?
camera
4k
views
1
answer
no
votes
2020-09-14 04:26:34 -0600
RoidDoi
Convert Images (cv::Mat)
convertTo
1k
views
no
answers
no
votes
2020-09-10 05:48:17 -0600
RashidLadj
Estimate camera pose from homography?
camera-pose
pose-estimation
homography-matrix
1k
views
no
answers
-1
votes
2020-09-10 03:17:14 -0600
hoseinimage
ValueError: setting an array element with a sequence.
findHomography
function
1k
views
no
answers
no
votes
2020-09-09 19:42:33 -0600
Ajith Nair
detect foreground and background colors from bounding rectangle
boundingBox
accessibility
foreground
backcolor
921
views
no
answers
no
votes
2020-09-09 15:17:42 -0600
AndrewSweter
Opencv4: Undefined reference to ippiw library symbols
opencv4
ippiw
7k
views
1
answer
no
votes
2020-09-09 11:56:24 -0600
grafy
opencv-4.4.0\modules\videoio\src\cap_msmf.cpp (682) CvCapture_MSMF::initStream Failed to set mediaType (stream 0, (640x480 @ 30) MFVideoFormat_RGB24(unsupported media type)
bug
243
views
no
answers
no
votes
2020-09-09 11:01:37 -0600
eyanson
Detect faces with facemask (COVID) [closed]
Facedetection
camera
1k
views
3
answers
1
vote
2020-09-13 03:28:30 -0600
sturkmen
Opencv multiple circle detection in a image
houghcircle
contours
imageprocessing
findContours
image-processing
2k
views
1
answer
no
votes
2020-09-10 02:08:23 -0600
berak
How to create 4D mat, like dnn::blobFromImage do?
4D
Mat
blobfromImage
17k
views
2
answers
no
votes
2020-09-12 09:57:59 -0600
AbhiTronix
RTSP Streaming, Gstreamer or FFmpeg ?
gstreamer
ffmpeg
c++
livestreaming
304
views
no
answers
no
votes
2020-10-04 14:42:35 -0600
supra56
Webcam generated image distorted and python stop working
webcam
opencv
python
516
views
no
answers
no
votes
2020-09-08 01:37:49 -0600
Warrior_KC
What is the best way to read frame from online streaming(using cv2.videocapture("sdp_file_name")) in every 5 secs from cv2.read ?
videostream
229
views
no
answers
no
votes
2020-09-07 23:35:36 -0600
jwk
About calibrateCamera()'s fx of standard deviation
calibration
calibrateCamera
3k
views
1
answer
no
votes
2020-09-09 19:44:29 -0600
auimager
How to use opencv demosaicing
demosaicing
debayering
249
views
no
answers
1
vote
2020-09-06 10:48:10 -0600
photogenx
OpenCV iOS - Camera Selection
ios
opencv
camera
iphone
278
views
no
answers
no
votes
2020-09-06 01:41:14 -0600
Nayan826
android Aruco. Cannot detect corners ?
aruco
android
2k
views
1
answer
1
vote
2020-10-13 16:52:03 -0600
Vijaykam
OpenCV 4.4 and multiprocessing on Windows 10
Windows-10
python3.8
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