Questions - OpenCV Q&A Forum

6k

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1

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no

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2018-10-28 04:30:06 -0600 berak

Find Centroid Coordinate of whole frame in OpenCV

opencvcentroidframe

462

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no

answers

no

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2018-10-28 00:56:37 -0600 TSL_

unexpected large reprojection error returned by solvePnPRansac

solvePnpRansac

241

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no

answers

1

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2018-10-27 14:48:16 -0600 tobix10

HOG groupRectangles [closed]

898

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no

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2018-10-27 12:59:58 -0600 jayaise

putText not working for video frame

javaopencv

531

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1

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no

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2018-10-27 12:06:50 -0600 berak

color percentage in image

209

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no

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-1

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2018-10-28 01:45:45 -0600 mpknap

Pixel Counting [closed]

delphi

126

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no

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no

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2018-10-27 06:48:09 -0600 berak

OpenCV on Debian Linux, runs code on Terminal but doesnt load as APP

798

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no

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no

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2018-10-26 07:12:19 -0600 sean2018

Opencv on MacOS Xcode can not use imread to read image based on c++

783

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2

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no

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2018-10-28 10:01:11 -0600 BALAKRISHANAN NAGARAJAN

How to concat Mat1's top half with Mat2's bottom half

1k

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2018-10-26 04:46:52 -0600 ldr007

Make Failure: cuda_compile_1_generated_gpu_mat.cu.o

cuda#cmake#opencv

1k

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1

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no

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2018-10-26 09:21:17 -0600 kbarni

Calculation of focal length

focal_lenght

1k

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1

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no

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2018-10-26 16:39:51 -0600 Hatmpatn

Identify object on a conveyor belt

1k

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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]

4k

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2018-10-25 09:06:16 -0600 massimo

opencv python - how to enable debug logging?

348

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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]

3k

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no

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no

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2018-10-25 05:46:03 -0600 wildwallaby

python cv2 stereoCalibrate [closed]

475

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1

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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.

4k

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1

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2018-10-27 08:51:04 -0600 berak

Opencv Java Convert Mat object to bytebuffer

java

33k

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no

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2018-10-25 04:12:58 -0600 Kostas

Remove zlib dependency

zlib

236

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no

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no

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2018-10-25 02:56:13 -0600 carsanbu

HoughLines with theta greater than PI

1k

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no

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2018-10-25 02:20:18 -0600 ghifarahadian

Error when opening video stream from IP camera

264

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1

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no

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2018-10-25 01:30:02 -0600 berak

what is the most effective way to measure middle width of trapezoid? C++

395

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1

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no

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2018-10-24 17:33:30 -0600 Nbb

Can only save first 28 frames from a video with 31830 frames

imwrite

237

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1

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no

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2018-10-25 14:39:27 -0600 aaff119911

OpenCV derivative kernel maximum aperture size 7 or 31

2k

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1

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no

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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

885

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1

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1

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2018-10-24 14:19:24 -0600 LBerger

max ksize for sobel

sobel
ksize

742

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1

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no

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2018-10-24 08:27:50 -0600 berak

How large should the dataset be when using cv2 recognizers (FisherFace, LBPH)? 10 images? 20? 100?

761

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1

answer

-1

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2018-10-24 05:08:15 -0600 berak

Is OpenCV frames passed by referenced?

6k

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1

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no

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2018-10-23 20:40:20 -0600 Tetragramm

Source code for GaussianBlur

1k

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no

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no

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2018-10-23 17:03:31 -0600 yancey

29,830 questions

Find Centroid Coordinate of whole frame in OpenCV

unexpected large reprojection error returned by solvePnPRansac

HOG groupRectangles [closed]

putText not working for video frame

color percentage in image

Pixel Counting [closed]

OpenCV on Debian Linux, runs code on Terminal but doesnt load as APP

Opencv on MacOS Xcode can not use imread to read image based on c++

How to concat Mat1's top half with Mat2's bottom half

Make Failure: cuda_compile_1_generated_gpu_mat.cu.o

Calculation of focal length

Identify object on a conveyor belt

Tried to compile tracker from tutorial and got error "‘Tracker’ was not declared in this scope Ptr<Tracker> tracker = TrackerKCF::create();" [closed]

opencv python - how to enable debug logging?

How to get more than one bounding box value from a single segmented-image for a given value? [closed]

python cv2 stereoCalibrate [closed]

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.

Opencv Java Convert Mat object to bytebuffer

Remove zlib dependency

HoughLines with theta greater than PI

Error when opening video stream from IP camera

what is the most effective way to measure middle width of trapezoid? C++

Can only save first 28 frames from a video with 31830 frames

OpenCV derivative kernel maximum aperture size 7 or 31

Mat::at throws error: Assertion failed ((unsigned)i0 < (unsigned)size.p[0]) in opencv\build\include\opencv2\core\mat.inl.hpp, line 1100

max ksize for sobel

How large should the dataset be when using cv2 recognizers (FisherFace, LBPH)? 10 images? 20? 100?

Is OpenCV frames passed by referenced?

Source code for GaussianBlur

dnn unresolved external symbol during linking [closed]

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