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29,830 questions
Tagged
229
views
no
answers
no
votes
2020-09-07 23:35:36 -0600
jwk
About calibrateCamera()'s fx of standard deviation
calibration
calibrateCamera
515
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
561
views
1
answer
no
votes
2020-09-08 19:42:12 -0600
johncederholm
DistanceTransform not working in Swift/Xcode
Swift
distanceTransform
146
views
no
answers
no
votes
2020-09-09 06:03:09 -0600
JWilliams
How can I calibate distortion using a series of lines
calibrateCamera
243
views
no
answers
no
votes
2020-09-09 11:01:37 -0600
eyanson
Detect faces with facemask (COVID) [closed]
Facedetection
camera
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
919
views
no
answers
no
votes
2020-09-09 15:17:42 -0600
AndrewSweter
Opencv4: Undefined reference to ippiw library symbols
opencv4
ippiw
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
3k
views
1
answer
no
votes
2020-09-09 19:44:29 -0600
auimager
How to use opencv demosaicing
demosaicing
debayering
2k
views
1
answer
1
vote
2020-09-10 01:13:30 -0600
sturkmen
Replace Color of Components that have specific color and are have transparent pixels as neighbours
shapedetection
segmentation
colorsegmentation
help
learningOpenCV
copencv
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
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
2020-09-10 05:48:17 -0600
RashidLadj
Estimate camera pose from homography?
camera-pose
pose-estimation
homography-matrix
253
views
no
answers
no
votes
2020-09-10 11:42:21 -0600
bixaw67773
checkerboard for camera calibration - does size matter?
camera
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
757
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
586
views
no
answers
no
votes
2020-09-11 09:23:10 -0600
berak
Why VideoCapture fails to open Aravis Camera?
CaptureVideo
opencv
camera
284
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
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
805
views
no
answers
no
votes
2020-09-11 15:06:37 -0600
ConnorM
Triangulation - Combining Data from Multiple Cameras
camera
calibration
triangulation
stereo
multiple
529
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
17k
views
2
answers
no
votes
2020-09-12 09:57:59 -0600
AbhiTronix
RTSP Streaming, Gstreamer or FFmpeg ?
gstreamer
ffmpeg
c++
livestreaming
951
views
no
answers
no
votes
2020-09-12 16:47:55 -0600
Pawel Kranzberg
Using findHomography to align scanned documents; How do I avoid obviously-bad (non-planar/3D) transforms?
image-registration
findHomography
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
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
1k
views
1
answer
2
votes
2020-09-13 04:17:10 -0600
berak
why the order of colors in drawChessboardCorners() changes?
calibrateCamera
chessboard
1k
views
no
answers
no
votes
2020-09-13 09:19:24 -0600
x-nikolas
Opencv does not works (Python 3) [closed]
opencv#python#
5k
views
1
answer
2
votes
2020-09-13 09:50:07 -0600
AbhiTronix
how to stream preprocessed video over network
opencv
Network
501
views
no
answers
no
votes
2020-09-13 10:34:12 -0600
Shay
Iris Recognition - Iris localization
iris-detection
704
views
no
answers
no
votes
2020-09-13 19:22:39 -0600
dubbiescoobie99
multiple opencv processes running
Multithreading
c++
opencv
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