Questions - OpenCV Q&A Forum

266

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1

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no

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2020-12-05 04:28:02 -0600 berak

Opencv based annotation is open

1k

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1

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no

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2020-12-05 03:42:42 -0600 sturkmen

installing 3.4.12 for ubuntu 18.04 LTS (install from source) for yolov4

installation-fails

835

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no

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no

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2020-12-04 09:17:00 -0600 fafafafa

pre-built OpenCv with extra modules for java

java
opencv

320

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no

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no

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2020-12-04 06:51:01 -0600 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

527

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1

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1

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2020-12-03 16:31:28 -0600 crackwitz

How to discover the input and output format of a cv::dnn::Net?

727

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1

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no

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2020-12-03 11:36:09 -0600 crackwitz

Training for roof tile detection

object_recognition

2k

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1

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no

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2020-12-03 11:11:26 -0600 crackwitz

Convert a Video.mp4 in a 2D Matrix where each row represents a frame

1k

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1

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no

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2020-12-03 09:34:06 -0600 berak

Real-time webcam stream very slow with pixel manipulation

1k

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1

answer

1

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2020-12-03 07:37:47 -0600 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

1k

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1

answer

1

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2020-12-03 07:02:10 -0600 fadeto404

Pixel-wise matrix multiplication

1k

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1

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1

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2020-12-02 21:10:57 -0600 sturkmen

Did convexityDefects function behaviour changed between cv2 versions 4.2.0 and 4.3.0?

209

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no

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no

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2020-12-02 16:22:39 -0600 pooooppppyyjhb

Why is the processImage delegate not getting called automatically?

1k

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no

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no

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2020-12-02 09:38:34 -0600 amateurpirate

Duplicate frames in saved file from cv2.VideoWriter

326

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1

answer

-1

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2020-12-02 08:54:07 -0600 berak

Finding center of contour in a game

findContours

583

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no

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no

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2020-12-02 08:00:45 -0600 Ting

Reduce the opencv framework size by using size optimization

1k

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no

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no

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2020-12-02 03:30:41 -0600 maw

imshow no window on Mac Big Sur with Python [closed]

588

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no

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-1

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2020-12-01 21:13:26 -0600 lilyily

Converting image to grayscale

820

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1

answer

1

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2020-12-01 11:25:19 -0600 crackwitz

stitch transform reuse

1k

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2

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no

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2020-12-01 11:24:36 -0600 kbarni

Birdseye transform with getPerspectiveTransform

perspective

496

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no

answers

no

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2020-12-01 10:18:57 -0600 sigmoid90

Pose estimation of image from a point cloud [closed]

246

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no

answers

no

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2020-12-01 07:39:09 -0600 Yaw Mensah

convert cv::Mat to a C Struct

OpenCVWrapper

2k

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no

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no

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2020-11-30 16:58:15 -0600 Phil2

guidance for mapping 2D image onto 3D geometry

2k

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1

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no

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2020-11-30 11:22:22 -0600 crackwitz

PatMax in OpenCV

1k

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1

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no

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2020-11-30 07:08:44 -0600 berak

How to eliminate Text underline?

1k

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1

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no

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2020-11-30 05:23:37 -0600 berak

Converting Mat of point cloud mesh to vector<cv::Point3d>

2k

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no

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1

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2020-11-30 03:48:20 -0600 sigmoid90

Projecting point cloud to image plane in order to estimate camera pose

1k

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1

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no

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2020-11-30 03:48:01 -0600 jaqueline.schweigert

OpenCV 4.5.0 Compile errors

19k

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1

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no

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2020-11-30 03:19:02 -0600 berak

How can I solve this problem? module 'cv2.cv2' has no attribute 'SURF'

attributeerror

3k

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1

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no

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2020-11-30 02:13:48 -0600 berak

Expired US patent on SIFT

1k

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no

answers

no

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2020-11-29 13:02:04 -0600 offsetnull1

29,830 questions

Opencv based annotation is open

installing 3.4.12 for ubuntu 18.04 LTS (install from source) for yolov4

pre-built OpenCv with extra modules for java

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?

How to discover the input and output format of a cv::dnn::Net?

Training for roof tile detection

Convert a Video.mp4 in a 2D Matrix where each row represents a frame

Real-time webcam stream very slow with pixel manipulation

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

Pixel-wise matrix multiplication

Did convexityDefects function behaviour changed between cv2 versions 4.2.0 and 4.3.0?

Why is the processImage delegate not getting called automatically?

Duplicate frames in saved file from cv2.VideoWriter

Finding center of contour in a game

Reduce the opencv framework size by using size optimization

imshow no window on Mac Big Sur with Python [closed]

Converting image to grayscale

stitch transform reuse

Birdseye transform with getPerspectiveTransform

Pose estimation of image from a point cloud [closed]

convert cv::Mat to a C Struct

guidance for mapping 2D image onto 3D geometry

PatMax in OpenCV

How to eliminate Text underline?

Converting Mat of point cloud mesh to vector<cv::Point3d>

Projecting point cloud to image plane in order to estimate camera pose

OpenCV 4.5.0 Compile errors

How can I solve this problem? module 'cv2.cv2' has no attribute 'SURF'

Expired US patent on SIFT

No rule to make target '/usr/local/lib/libz.so', needed by 'lib/libopencv_core.so.4.5.1

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