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12,357 questions
Tagged
415
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answers
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2017-04-25 05:04:12 -0600
Nils Koehler
cvtColor RGB to GRAY end up in a shorter video with nine tiles instead of one
opencv
cvtColor
COLOR_RGB2GRAY
python
conda
jupyter
878
views
no
answers
1
vote
2013-05-16 16:06:43 -0600
bschlinker
Matching thermographic / non-thermographic images with OpenCV feature detectors
feature_detector
ImageMatching
2k
views
no
answers
no
votes
2017-02-16 01:12:55 -0600
Clementf2b
detect HSV color for skin color and extract the color in that region
skin
1k
views
no
answers
no
votes
2014-10-31 01:17:40 -0600
Jenny
How to calculate filter coefficients of low pass ButterWorth filter C++
#coefficients
#c++
#opencv
#smooth
#filter
#video-processing
1k
views
no
answers
-1
votes
2017-07-26 14:16:57 -0600
abhinavmathur96
Unable to run OpenCV code template in codeblocks
codeblocks16.01
Opencv3.2.0
ubuntu16.04
98
views
no
answers
no
votes
2019-03-16 17:58:34 -0600
Nabhan
RGB changing B value affects R and G as well.... How to solve?
java
opencv
getpixel
setPixel
217
views
no
answers
no
votes
2016-04-14 12:34:37 -0600
Silberlicht
OpenCV4Android - calcCovarMatrix for image averages
android
opencv
calcCovarMatrix
covariance
Mahalanobis
301
views
no
answers
no
votes
2016-05-16 18:28:33 -0600
USER_123
ORB rBRIEF greedy search
ORB
greedy
rBRIEF
401
views
no
answers
1
vote
2013-06-08 07:38:17 -0600
Marchello
native-activity example doesn't work on my tegra 3 device
native-activity
1k
views
no
answers
1
vote
2013-10-14 07:51:15 -0600
Robionic
Masking the area outside a 2D set of grid points OpenCV
2dgrid
mask
2.4.6
53
views
no
answers
no
votes
2017-12-30 02:01:01 -0600
Avoid
How to use latest master of opencv?
latestmaster
285
views
no
answers
no
votes
2017-10-30 20:59:07 -0600
BGYOO
opencv_contrib CMake build error in Windows10
opencv#cmake
2k
views
no
answers
no
votes
2015-02-13 10:31:49 -0600
Doombot
Subpixel location of keypoints. Why?
fast
brisk
keypoint
keypoint-matching
ORB
16k
views
no
answers
no
votes
2019-07-26 22:08:48 -0600
supra56
AttributeError: module 'cv2.cv2' has no attribute 'saliency'[SOLVED]
saliency
import
modules
6k
views
no
answers
no
votes
2020-04-04 20:50:36 -0600
supra56
AttributeError: 'NoneType' object has no attribute 'shape'
python#opencv#
288
views
no
answers
1
vote
2018-03-19 10:22:04 -0600
AnnaB
Is Flann thread-safe? C++
flann
с++
713
views
no
answers
1
vote
2015-05-26 09:59:29 -0600
brainsandwich
Issue with libnative_camera on Android >= 5.0
android-ndk
androidnative
109
views
no
answers
no
votes
2020-01-13 02:21:03 -0600
Magres
stereoRectify strange optical centres
stereorectify
156
views
no
answers
-1
votes
2018-12-07 01:47:37 -0600
Ameer Usman
OpenCV using Python to Detect any Object
python#detection#
614
views
no
answers
no
votes
2020-04-03 05:52:54 -0600
simonsk1990
Why its necessary to have cv2.waitKey() & 0xff to run video
cv2.imshow
7k
views
no
answers
1
vote
2012-10-08 18:28:11 -0600
rannock
Training of SVM classifier in OpenCV using HOG, SIFT and ORB features
HOG
SIFT
SVM
270
views
no
answers
no
votes
2019-07-01 09:06:16 -0600
anyahaddon
Detecting tennis balls with HoughCircles
circledetection
houghcircle
199
views
no
answers
no
votes
2014-04-20 10:04:17 -0600
LadyUnknowing
Question about unknown parameter- I am not a coder
camCalibrationMatrix
distorsion
translation
1k
views
no
answers
no
votes
2013-12-21 08:21:01 -0600
Takatoshi Nao
UnsatisfiedLinkError: bitmapToMat on Android
#opencv#java#android
1k
views
no
answers
no
votes
2018-07-24 10:18:47 -0600
vkg93
Aruco Markers white margin
aruco
3k
views
no
answers
6
votes
2015-07-14 05:00:54 -0600
mkc
Is there a reason why OpenCV does not support (CV_32U) 32 bit depth unsigned integer Mat?
Mat
CV_32U
general
4k
views
no
answers
no
votes
2019-04-03 10:08:02 -0600
HYPEREGO
Extracting the Essential matrix from the Fundamental matrix
findFundamentalMat
Fundamental
svd
essential
KITTI
1k
views
no
answers
no
votes
2014-11-22 16:07:02 -0600
ido
compilation error when #include opencv.h with vs2010
#vs10
#Compile
359
views
no
answers
no
votes
2016-09-21 09:42:37 -0600
Serge
Gpu API call <misaligned adress>
CUDA
error
histogram
1k
views
no
answers
no
votes
2018-06-28 02:55:37 -0600
Akhilesh
What is the minimum version of OpenCL required for OpenCV dnn module.
dnn
opencl
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