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
5,271 questions
Tagged
opencv
×
35k
views
no
answers
no
votes
2019-12-17 23:27:22 -0600
clefrks
error: (-215:Assertion failed) !_img.empty() in function 'imwrite [closed]
opencv
ffmpeg
Library
linux
164
views
no
answers
no
votes
2019-12-18 11:04:37 -0600
heisenburg007
Get video input when device not on uvc input
python
c++
opencv
238
views
no
answers
no
votes
2019-12-19 18:25:25 -0600
supra56
How to draw contours on squares drawn with pencil (Python)
opencv
python
contours
501
views
no
answers
no
votes
2019-12-24 14:18:38 -0600
karDilip
OpenCV Java: Iterate through all points in Line as obtained from FitLine & find distance of each point to Contour edge using pointPolygonTest - Little Help Please!
opencv
java
2k
views
no
answers
no
votes
2019-12-27 05:34:46 -0600
arnthorg
Syncing multiple cameras with the multiprocessing library
opencv
python
RaspberryPi
3k
views
no
answers
no
votes
2019-12-28 07:54:19 -0600
berak
Assertion failed (!fixedType() || ((Mat*)obj)->type() == mtype) in cv::_OutputArray::create while Performing DFT
assertion
c++
opencv
dft
154
views
no
answers
no
votes
2019-12-28 19:25:49 -0600
papabiceps
Learning the background model using images
opencv
BackgorundSubtractor
323
views
no
answers
no
votes
2019-12-29 10:39:00 -0600
AstroBen
CUDA: Has anyone tried passing GpuMats to other Python CUDA modules?
CUDA
python
opencv
cupy
557
views
no
answers
no
votes
2019-12-30 04:41:01 -0600
GW
How to get daytime of each frame when use cv2.VideoCapture("ip camera") python?
camera
opencv
python
daytime
cv2VideoCapture
time
693
views
no
answers
no
votes
2020-01-02 12:46:56 -0600
paul espinosa
opencv dnn shows error when use resnet50.cfg from darknet
darknet
opencv
c++dnnopencv
180
views
no
answers
no
votes
2020-01-03 17:14:26 -0600
JWKowns
20x20 Mat gets reshaped to 1x1200, expected 1x400 for kNearest [closed]
opencv
488
views
no
answers
no
votes
2020-01-04 17:41:31 -0600
abbeykevin
What is the best way to get the size and speed of a bubble in a video using python? [closed]
opencv
python
Video
812
views
no
answers
1
vote
2020-01-09 05:00:16 -0600
Sean87
Calibrating camera only for one plane
calibrateCamera
calibration
c++
opencv
2k
views
no
answers
no
votes
2020-01-13 03:16:26 -0600
FishCoder
Run Converted .pb model by using OpenCV's DNN Module
tensorflow
opencv
MaskRcnn
194
views
no
answers
no
votes
2020-01-14 01:44:50 -0600
Pradeep Chandra
How to connect to pelco camera using opencv python
opencv
python
pelco
121
views
no
answers
no
votes
2020-01-14 04:46:07 -0600
DoubleR
FastNlMeanDenoisingMulti - Faster way, improve time
opencv
python
fastNlMeansDenoising
image-processing
denoising
62
views
no
answers
no
votes
2020-01-16 18:07:46 -0600
Reshika
Orienting an Object in an image horizontally
python
opencv
274
views
no
answers
no
votes
2020-01-19 11:32:45 -0600
g40
Take 2: Building cv2_xxx.pyd for Windows x64/Python3.7
python
opencv
cmake
windows
1k
views
no
answers
no
votes
2020-01-24 14:20:35 -0600
hernancrespo
cv2.cvtColor causes to stop Python
python
pyqt5
opencv
623
views
no
answers
no
votes
2020-01-26 10:14:40 -0600
sreev
cuda nppial library not found while opencv compiling opencv-4.2.0
opencv
c++
CUDA
nvidia
239
views
no
answers
no
votes
2020-01-27 05:48:23 -0600
pitchaimuthu321
How to work with leaf disease detection Need a Help openCV
python
opencv
RaspberryPi
Leaf
Disease
detection
195
views
no
answers
no
votes
2020-01-28 07:18:46 -0600
kalv
Site_packages not updated after Windows Build of Open CV
opencv
build
python
696
views
no
answers
no
votes
2020-01-29 04:19:30 -0600
eLtronicsvilla
How can I re-track an object if track(using optical flow) lost?
object-tracking
image-processing
c++
opencv
computervision
opticalflow
1k
views
no
answers
no
votes
2020-02-01 01:18:00 -0600
Mohammad
OpenCV Exposure Compensation Without The Need To Stitch Images
opencv
python
ExposureCompensator
291
views
no
answers
no
votes
2020-02-01 09:11:48 -0600
hernancrespo
Mean of a frame always change? [closed]
opencv
1k
views
no
answers
no
votes
2020-02-03 03:40:51 -0600
Imran B
Cv2.cuda.remap assertion error
python
opencv
CUDA
remap
fisheye
1k
views
no
answers
no
votes
2020-02-06 01:39:59 -0600
Imran B
Image Stitching with cv2.cuda()
CUDA
opencv
python
videostitching
157
views
no
answers
no
votes
2020-02-06 01:53:55 -0600
Zana Zakaryaie Nejad
Does OpenCV uses GEMM for convolution?
opencv
GEMM
Convolution
sepFilter2d
193
views
no
answers
no
votes
2020-02-06 08:13:47 -0600
tsabbir96
Hello, I would like to segment some images based on some conditions, Could you help me with that?
opencv
python
8k
views
no
answers
no
votes
2020-02-06 19:19:04 -0600
gersonmlb
Error cv :: VideoWriter :: open VIDEOIO (CV_IMAGES): raised OpenCV exception: when executing a .exe packaged from a .py
opencv
python
videocapture
« previous
1
...
167
168
169
170
171
...
176
next page »
Links
Official site
GitHub
Wiki
Documentation
Contributors
Tags
opencv
×30
python
×18
c++
×5
CUDA
×4
image-processing
×2
RaspberryPi
×2
assertion
×1
BackgorundSubtractor
×1
build
×1
calibrateCamera
×1
calibration
×1
camera
×1
c++dnnopencv
×1
cmake
×1
computervision
×1
contours
×1
Convolution
×1
cupy
×1
cv2VideoCapture
×1
darknet
×1
daytime
×1
denoising
×1
detection
×1
dft
×1
Disease
×1
ExposureCompensator
×1
fastNlMeansDenoising
×1
ffmpeg
×1
fisheye
×1
GEMM
×1
java
×1
Leaf
×1
Library
×1
linux
×1
MaskRcnn
×1
nvidia
×1
object-tracking
×1
opticalflow
×1
pelco
×1
pyqt5
×1
remap
×1
sepFilter2d
×1
tensorflow
×1
time
×1
Video
×1
videocapture
×1
videostitching
×1
windows
×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
×