First time here? Check out the FAQ!
Attention! This forum will be made read-only by Dec-20. Please migrate to
https://forum.opencv.org
. Most of existing active users should've received invitation by e-mail.
Hi there! Please sign in
help
faq
tags
users
badges
ALL
UNANSWERED
Ask Your Question
RSS
Sort by »
date
activity ▼
answers
votes
30,412 questions
Tagged
2
views
1
answer
no
votes
2020-12-04 11:04:18 -0500
berak
Opencv based annotation is open
opencv_annotation
cannot_open
3
views
no
answers
no
votes
2020-12-04 10:55:34 -0500
ConnorM
Triangulation with Ground Plane as Origin
calibration
cameras
transformation
rotation
translation
6
views
no
answers
no
votes
2020-12-04 09:27:18 -0500
hammockman
cv::dnn::blobFromImage() works in python but fails in c++
c++
dnn
opencv
blobfromImage
21
views
no
answers
no
votes
2020-12-04 09:17:00 -0500
fafafafa
pre-built OpenCv with extra modules for java
java
opencv
12
views
no
answers
no
votes
2020-12-04 06:51:01 -0500
berak
i am creating a dataset for real time face recognition using python. i want it should intimate if the image already available in dataset. how to implement in opencv?
opencv-python
33
views
no
answers
no
votes
2020-12-04 03:38:58 -0500
ryan227
installing 3.4.12 for ubuntu 18.04 LTS (install from source) for yolov4
installation-fails
19
views
1
answer
1
vote
2020-12-03 16:31:28 -0500
crackwitz
How to discover the input and output format of a cv::dnn::Net?
deep-neural-network
c++#dnn#opencv
37
views
1
answer
no
votes
2020-12-03 11:36:09 -0500
crackwitz
Training for roof tile detection
object_recognition
11
views
1
answer
no
votes
2020-12-03 11:11:26 -0500
crackwitz
Convert a Video.mp4 in a 2D Matrix where each row represents a frame
python3
opencv
12
views
no
answers
1
vote
2020-12-03 09:34:41 -0500
diablodale
historical performance test cast data in build pipeline?
performance
testing
build
pipeline
15
views
1
answer
no
votes
2020-12-03 09:34:06 -0500
berak
Real-time webcam stream very slow with pixel manipulation
opencv
python
54
views
1
answer
1
vote
2020-12-03 07:37:47 -0500
supra56
I am create a rectangle box in video stream using python. how to apply face detection in rectangular box inside only and don't need out of the rectangular box detect face
opencv-python
20
views
1
answer
1
vote
2020-12-03 07:02:10 -0500
fadeto404
Pixel-wise matrix multiplication
matrix
vector
multiplication
41
views
1
answer
1
vote
2020-12-02 21:10:57 -0500
sturkmen
Did convexityDefects function behaviour changed between cv2 versions 4.2.0 and 4.3.0?
python
build_opencv_python
convexityDefects
contours
20
views
no
answers
no
votes
2020-12-02 16:22:39 -0500
srsopoci
Why is the processImage delegate not getting called automatically?
processing
image
process
delegate
ios
unity
29
views
no
answers
no
votes
2020-12-02 09:38:34 -0500
amateurpirate
Duplicate frames in saved file from cv2.VideoWriter
CAP_PROP_FPS
USBcamera
cv2.videocapture
python
cv2.VideoWriter
27
views
1
answer
-1
votes
2020-12-02 08:54:07 -0500
berak
Finding center of contour in a game
findContours
17
views
no
answers
no
votes
2020-12-02 08:00:45 -0500
Ting
Reduce the opencv framework size by using size optimization
size
optimization
ios
xcode
gcc
compiler
25
views
no
answers
no
votes
2020-12-02 03:30:41 -0500
maw
imshow no window on Mac Big Sur with Python [closed]
opencv
python
imshow
18
views
no
answers
no
votes
2020-12-02 03:02:42 -0500
AndrewM
How can I track the disappearance of a TV logo in a certain area in a frame (ROI)?
opencv
video_processing
18
views
no
answers
-1
votes
2020-12-01 21:13:26 -0500
lilyily
Converting image to grayscale
opencv
python
26
views
1
answer
1
vote
2020-12-01 11:25:19 -0500
crackwitz
stitch transform reuse
image-stitching
stitching
python3
44
views
2
answers
no
votes
2020-12-01 11:24:36 -0500
kbarni
Birdseye transform with getPerspectiveTransform
perspective
17
views
no
answers
no
votes
2020-12-01 10:18:57 -0500
sigmoid90
Pose estimation of image from a point cloud [closed]
3dreconstruction
matching
pose_estimation
image-registration
pointcloud
19
views
no
answers
no
votes
2020-12-01 07:39:09 -0500
Yaw Mensah
convert cv::Mat to a C Struct
OpenCVWrapper
54
views
no
answers
no
votes
2020-11-30 16:58:15 -0500
Phil2
guidance for mapping 2D image onto 3D geometry
2d-3d-mapping
texture
calibration
point_cloud
33
views
1
answer
no
votes
2020-11-30 11:22:22 -0500
crackwitz
PatMax in OpenCV
locate
patmax
industrial
Pattern_recognition
pattern-matching
aoi
88
views
1
answer
no
votes
2020-11-30 07:08:44 -0500
berak
How to eliminate Text underline?
grayText
darkerText
darkenText
ScannedDoc
34
views
1
answer
no
votes
2020-11-30 05:23:37 -0500
berak
Converting Mat of point cloud mesh to vector<cv::Point3d>
point_cloud
3Dmesh
projection
c++
38
views
no
answers
1
vote
2020-11-30 03:48:20 -0500
sigmoid90
Projecting point cloud to image plane in order to estimate camera pose
3dreconstruction
opencv
matching
pose_estimation
image-registration
point_cloud
1
2
3
4
5
...
1014
next page »
Links
Official site
GitHub
Wiki
Documentation
Contributors
Tags
opencv
×8
python
×5
point_cloud
×3
3dreconstruction
×2
c++
×2
calibration
×2
image-registration
×2
ios
×2
matching
×2
opencv-python
×2
pose_estimation
×2
python3
×2
2d-3d-mapping
×1
3Dmesh
×1
aoi
×1
blobfromImage
×1
build
×1
build_opencv_python
×1
cameras
×1
cannot_open
×1
CAP_PROP_FPS
×1
c++#dnn#opencv
×1
compiler
×1
contours
×1
convexityDefects
×1
cv2.videocapture
×1
cv2.VideoWriter
×1
darkenText
×1
darkerText
×1
deep-neural-network
×1
delegate
×1
dnn
×1
findContours
×1
gcc
×1
grayText
×1
image
×1
image-stitching
×1
imshow
×1
industrial
×1
installation-fails
×1
java
×1
locate
×1
matrix
×1
multiplication
×1
object_recognition
×1
opencv_annotation
×1
OpenCVWrapper
×1
optimization
×1
patmax
×1
pattern-matching
×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
×
