First time here? Check out the FAQ!
Hi there! Please sign in
help
faq
tags
users
badges
This forum is disabled, please visit
https://forum.opencv.org
ALL
UNANSWERED
Ask Your Question
RSS
Sort by »
date
activity
answers ▲
votes
29,830 questions
Tagged
2k
views
3
answers
no
votes
2018-06-21 04:28:34 -0600
azdoud.y
How to solve problem with VideoCapture loading in linux ?
opencv
13k
views
3
answers
1
vote
2020-08-13 22:51:08 -0600
jcrist
How to merge nearby rectangles
opencv
python
contours
rectangles
10k
views
3
answers
1
vote
2018-12-02 13:38:08 -0600
sturkmen
merge overlapping rectangles
groupRectangles
2k
views
3
answers
no
votes
2018-12-16 06:42:43 -0600
berak
Converting LUV-->RGB-->LUV results in different values
colorspace
CIE-LUV
4k
views
3
answers
2
votes
2019-01-24 15:49:23 -0600
LBerger
function "drawKeypoints" do not work in openCV 4.0.1
opencv
python
drawKeypoints
4k
views
3
answers
1
vote
2020-12-21 10:10:43 -0600
Antonio
How can I check if the monitor is connected in Windows / Linux?
imshow
namedwindow
windows
linux
monitor
661
views
3
answers
1
vote
2019-02-14 07:00:27 -0600
ya_ocv_user
How to incorporate white into color system?
HSV
color_detection
2k
views
3
answers
no
votes
2019-03-01 06:47:55 -0600
supra56
Python Opencv Structured Forests Edge Detection TypeError
opencv
python
numpy
image-processing
edgedetection
782
views
3
answers
no
votes
2019-04-08 11:09:32 -0600
HYPEREGO
OpenCV capabilities - image processing
image
processing
defect
recognition
4k
views
3
answers
1
vote
2019-04-17 09:01:14 -0600
HYPEREGO
Where to begin for a license car plate recognition system
opencv
4k
views
3
answers
no
votes
2019-05-19 21:57:59 -0600
supra56
OpenCV setup issue with dlib build on windows
Dlib
3k
views
3
answers
no
votes
2019-06-05 13:06:27 -0600
Eduardo
How to calculate scale factor between two images (by SIFT matching)
SIFT
8k
views
3
answers
no
votes
2019-07-22 03:16:06 -0600
Reino
Make error __atomic_fetch_add_8 on RaspberryPi4
raspberrypi4
build
error
12k
views
3
answers
no
votes
2019-07-20 08:22:03 -0600
supra56
How to put rotated text in OpenCV ?
cvPutText
3k
views
3
answers
1
vote
2019-10-30 12:35:30 -0600
MauroNRa
Generate custom opencv .so for Android [Windows 10] [Solved]
android
3k
views
3
answers
no
votes
2019-11-03 15:19:47 -0600
Billie
Extract Handwriting and Print from Background
2d-image
image-processing
OCR
16k
views
3
answers
no
votes
2019-11-13 06:25:47 -0600
supra56
How to fix error error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow' when trying to capture a video stream?
opencv
python
8k
views
3
answers
no
votes
2019-11-30 08:47:40 -0600
rtrahms
Importing OpenCV 4.X android SDK module into Android Studio
android
studio
java
opencv
drawcontour
1k
views
3
answers
no
votes
2019-12-02 09:17:47 -0600
supra56
Unable to see and take the picture in second time
image
in
Second
time
7k
views
3
answers
no
votes
2020-12-19 17:45:05 -0600
taesookim0412
HSV white color range in JS
cv.inRange
opencvjs
HSV
inRange
javascript
883
views
3
answers
no
votes
2019-12-30 03:36:01 -0600
Gandalf2019
cv::cuda::convolve artifacts
CUDA
Convolve
filter
artifacts
LinearFilter
11k
views
3
answers
no
votes
2020-01-14 23:45:29 -0600
Sherman
opencv 4.1.2 - TypeError: Expected Ptr<cv::UMat> for argument '%s'
TypeError
4.1.2
3k
views
3
answers
1
vote
2020-01-09 02:32:30 -0600
LBerger
convert cv::Mat to vector<vector<uchar>> img;
matrix
8k
views
3
answers
no
votes
2020-01-20 08:36:02 -0600
supra56
How to draw contour lines between every colour?
funny
1k
views
3
answers
no
votes
2020-07-13 18:39:56 -0600
Alice_aj
Converting ArUco axis-angle to Unity3D Quaternion
calibration
aruco
2k
views
3
answers
no
votes
2020-07-17 13:29:17 -0600
berak
show video and texts on single window
opencv
python
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
8k
views
3
answers
no
votes
2020-09-15 18:57:23 -0600
heavyswat
OpenCV GPU without compiling ?
opencv
gpu
CUDA
1k
views
3
answers
no
votes
2020-11-26 13:38:03 -0600
AndyK
Use Opencl to access Umat data
opencl
UMat
1k
views
3
answers
no
votes
2020-12-11 05:59:55 -0600
sturkmen
Optimizations on opencv hog implementation(interp_weight, gaussian)
HOGDescriptor
HOG
hogcompute
« previous
1
...
988
989
990
991
992
...
995
next page »
Links
Official site
GitHub
Wiki
Documentation
Contributors
Tags
opencv
×9
python
×5
image-processing
×3
android
×2
contours
×2
CUDA
×2
HSV
×2
image
×2
2d-image
×1
4.1.2
×1
artifacts
×1
aruco
×1
build
×1
calibration
×1
CIE-LUV
×1
color_detection
×1
colorspace
×1
Convolve
×1
cv.inRange
×1
cvPutText
×1
defect
×1
Dlib
×1
drawcontour
×1
drawKeypoints
×1
edgedetection
×1
error
×1
filter
×1
findContours
×1
funny
×1
gpu
×1
groupRectangles
×1
HOG
×1
hogcompute
×1
HOGDescriptor
×1
houghcircle
×1
imageprocessing
×1
imshow
×1
in
×1
inRange
×1
java
×1
javascript
×1
LinearFilter
×1
linux
×1
matrix
×1
monitor
×1
namedwindow
×1
numpy
×1
OCR
×1
opencl
×1
opencvjs
×1
Copyright
OpenCV foundation
, 2012-2018. Content on this site is licensed under a
Creative Commons Attribution Share Alike 3.0
license.
Powered by Askbot version 0.10.2
Please note: OpenCV answers requires javascript to work properly, please enable javascript in your browser,
here is how
dummy
×