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29,830 questions
Tagged
297
views
1
answer
no
votes
2018-10-24 07:27:13 -0600
berak
cv::putText without a GUI thread, or named window?
GUI
addText
697
views
1
answer
no
votes
2018-10-24 08:27:50 -0600
berak
How large should the dataset be when using cv2 recognizers (FisherFace, LBPH)? 10 images? 20? 100?
facialrecognition
recognizer
dataset
Fisherfaces
LBPH
Haar
818
views
1
answer
1
vote
2018-10-24 14:19:24 -0600
LBerger
max ksize for sobel
sobel
ksize
367
views
1
answer
no
votes
2018-10-24 17:33:30 -0600
Nbb
Can only save first 28 frames from a video with 31830 frames
imwrite
2k
views
1
answer
no
votes
2018-10-24 18:42:03 -0600
berak
Mat::at throws error: Assertion failed ((unsigned)i0 < (unsigned)size.p[0]) in opencv\build\include\opencv2\core\mat.inl.hpp, line 1100
Mat
at
1100
235
views
1
answer
no
votes
2018-10-25 01:30:02 -0600
berak
what is the most effective way to measure middle width of trapezoid? C++
c++
opencv
contours
measure
Mat
1k
views
no
answers
no
votes
2018-10-25 02:20:18 -0600
ghifarahadian
Error when opening video stream from IP camera
Windows-10
cap_ffmpeg_impl
ipcamera
videostream
211
views
no
answers
no
votes
2018-10-25 02:56:13 -0600
carsanbu
HoughLines with theta greater than PI
Hough
HoughLines
33k
views
no
answers
no
votes
2018-10-25 04:12:58 -0600
Kostas
Remove zlib dependency
zlib
3k
views
no
answers
no
votes
2018-10-25 05:46:03 -0600
wildwallaby
python cv2 stereoCalibrate [closed]
stereo-calibration
calibrateCamera
assertionerror
opencv
python
332
views
no
answers
no
votes
2018-10-25 05:59:31 -0600
Deepak3994
How to get more than one bounding box value from a single segmented-image for a given value? [closed]
image-processing
python
3k
views
no
answers
no
votes
2018-10-25 09:06:16 -0600
massimo
opencv python - how to enable debug logging?
opencv
python
loggin
413
views
1
answer
no
votes
2018-10-25 13:54:50 -0600
SylvainArd
I have a leaf dataset that I will use to build a model in classifying the disease. However, i have to separate the foreground from the background and retain the leaf only. Can someone please help me with this? thanks.
python
segmentation
215
views
1
answer
no
votes
2018-10-25 14:39:27 -0600
aaff119911
OpenCV derivative kernel maximum aperture size 7 or 31
derivative
kernel
getDerivKernels
size
1k
views
no
answers
no
votes
2018-10-25 23:02:53 -0600
berak
Tried to compile tracker from tutorial and got error "‘Tracker’ was not declared in this scope Ptr<Tracker> tracker = TrackerKCF::create();" [closed]
error
tracker
c++
1k
views
no
answers
no
votes
2018-10-26 04:46:52 -0600
ldr007
Make Failure: cuda_compile_1_generated_gpu_mat.cu.o
cuda#cmake#opencv
780
views
no
answers
no
votes
2018-10-26 07:12:19 -0600
sean2018
Opencv on MacOS Xcode can not use imread to read image based on c++
c++opencv
macos
1k
views
1
answer
no
votes
2018-10-26 09:21:17 -0600
kbarni
Calculation of focal length
focal_lenght
1k
views
1
answer
no
votes
2018-10-26 16:39:51 -0600
Hatmpatn
Identify object on a conveyor belt
templade
matching
rotation
locate
object
114
views
no
answers
no
votes
2018-10-27 06:48:09 -0600
berak
OpenCV on Debian Linux, runs code on Terminal but doesnt load as APP
debian
opencv
Texas
Instruments
AM5728
4k
views
1
answer
no
votes
2018-10-27 08:51:04 -0600
berak
Opencv Java Convert Mat object to bytebuffer
java
506
views
1
answer
no
votes
2018-10-27 12:06:50 -0600
berak
color percentage in image
python
opencv
pixel
Count
747
views
no
answers
no
votes
2018-10-27 12:59:58 -0600
jayaise
putText not working for video frame
javaopencv
227
views
no
answers
1
vote
2018-10-27 14:48:16 -0600
tobix10
HOG groupRectangles [closed]
HOG
nms
groupRectangles
426
views
no
answers
no
votes
2018-10-28 00:56:37 -0600
TSL_
unexpected large reprojection error returned by solvePnPRansac
solvePnpRansac
192
views
no
answers
-1
votes
2018-10-28 01:45:45 -0600
mpknap
Pixel Counting [closed]
delphi
5k
views
1
answer
no
votes
2018-10-28 04:30:06 -0600
berak
Find Centroid Coordinate of whole frame in OpenCV
opencvcentroidframe
189
views
1
answer
no
votes
2018-10-28 05:31:32 -0600
berak
Checking the Sample Size Input for `cv::ml::StatModel::predict()` Loaded from File?
ml
477
views
no
answers
no
votes
2018-10-28 05:44:26 -0600
berak
OpenCV 4.0 Alpha Installation
opencv4
macos
1k
views
no
answers
no
votes
2018-10-28 09:44:12 -0600
berak
How do i autosize an image so that i do not get IndexError: index 303 is out of bounds for axis 0 with size 303
opencv
numpy
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