Questions - OpenCV Q&A Forum

24

views

1

answer

-1

votes

2020-07-11 08:15:46 -0500 berak

how to resolve (-215:Assertion failed) !_src.empty() in function 'cv::boxFilter'

java
opencv

16

views

no

answers

1

vote

2020-07-08 17:03:17 -0500 bodell

VideoCapture.read blocking Java thread in RUNNING state

41

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no

answers

no

votes

2020-07-04 12:45:06 -0500 George Profenza

How to use OpenCV 4 in Java on Raspberry PI (armv6 and armv7 Raspian)?

21

views

1

answer

no

votes

2020-06-29 01:24:54 -0500 berak

lheibph = LBPHFaceRecognizer.create();

face
java

25

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no

answers

no

votes

2020-06-23 08:37:18 -0500 gvfbossa

OpenCV Java VS Objective C

57

views

1

answer

1

vote

2020-06-12 06:51:33 -0500 Miorii

ORB model conversion from python to java

40

views

no

answers

no

votes

2020-06-01 23:08:50 -0500 muas

I am using LBPH model yml to save images after train, how can i save images with their user-id

java
opencv

28

views

no

answers

no

votes

2020-06-01 10:44:02 -0500 kamadi

issue training using lbph model

29

views

no

answers

no

votes

2020-05-29 20:51:06 -0500 hawk-

applique smooth Gaussian using opencv with java?

opencv
java

57

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no

answers

no

votes

2020-05-21 03:48:49 -0500 pasqua_le

Why i cant build opencv 4.3.0_2 in java on macOS Catalina?

java

92

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no

answers

no

votes

2020-05-06 08:13:15 -0500 thor2.7182

Opencv430.jar was not created after cmake [closed]

104

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no

answers

no

votes

2020-05-04 22:01:39 -0500 Altheim

How to classify image of object on a game board

63

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no

answers

no

votes

2020-05-01 03:41:04 -0500 JulesHummelink

Memory leak with openCV on android

119

views

2

answers

1

vote

2020-04-27 01:45:58 -0500 pivdet

How to declare a small image for test in openCV Android?

75

views

no

answers

no

votes

2020-04-26 20:07:02 -0500 LiorA

Opencv 4.3.0 build Failure (gradle 6.3 fail twice)

77

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no

answers

no

votes

2020-04-13 12:28:54 -0500 dhirwinjr

How to best free up DNN and GPU resources when finished?

481

views

no

answers

no

votes

2020-04-13 12:01:53 -0500 DarkSkies

2 Euro Coin detector which Country is it? Is it front or backside from this coin?

java

58

views

no

answers

no

votes

2020-04-07 04:44:43 -0500 gaby

SIGSEGV in libopencv_core.4.1.dylib called from java, works on one machine but not another [closed]

42

views

no

answers

-1

votes

2020-04-05 13:25:52 -0500 lencls

How can i make matchtemplate with threshold (java maeven)

86

views

no

answers

-1

votes

2020-03-28 10:44:17 -0500 katabolerTeufel

OpenCV 4.2 build with contrib modules java

87

views

1

answer

no

votes

2020-03-28 05:49:53 -0500 otoker

Displaying UDP Multicast Stream

92

views

1

answer

no

votes

2020-03-23 17:51:04 -0500 ssokolow

Find only internal contours in JavaCV/OpenCV

90

views

no

answers

no

votes

2020-03-17 15:01:25 -0500 DrThrax

Java: Core.Pow: (-215:Assertion failed) depth == CV_32F || depth == CV_64F

83

views

no

answers

no

votes

2020-03-06 03:26:55 -0500 supra56

calling mat.copyto and mat.clone in loop causes machine to freeze in java [closed]

111

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no

answers

no

votes

2020-02-28 16:05:04 -0500 PressedTin

How do I make the method onCameraFrame() be called more frequently

59

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no

answers

no

votes

2020-02-28 14:44:41 -0500 ROMEL

from an image having multiple rectangles some rectangles are filled with lines an some are empty like given below in the image.i need to remove all the rectangles which are empty.Any suggestions?

344

views

1

answer

no

votes

2020-02-27 09:06:05 -0500 PressedTin

How do I get 0-255 RGB values from an RGBA mat?

100

views

1

answer

no

votes

2020-02-25 07:36:31 -0500 rm_ein

OpenCV 4.2: The method drawFrameAxes(Mat, Mat, Mat, Mat, Mat, float) is undefined for the type Calib3d

111

views

no

answers

no

votes

2020-02-25 07:25:11 -0500 Jonaskri

Upgraded from 3.4.9 to 4.2.0 and can no longer see camera view [Android]

96

views

no

answers

no

votes

2020-02-24 05:27:22 -0500 krjeev

1,356 questions

how to resolve (-215:Assertion failed) !_src.empty() in function 'cv::boxFilter'

VideoCapture.read blocking Java thread in RUNNING state

How to use OpenCV 4 in Java on Raspberry PI (armv6 and armv7 Raspian)?

lheibph = LBPHFaceRecognizer.create();

OpenCV Java VS Objective C

ORB model conversion from python to java

I am using LBPH model yml to save images after train, how can i save images with their user-id

issue training using lbph model

applique smooth Gaussian using opencv with java?

Why i cant build opencv 4.3.0_2 in java on macOS Catalina?

Opencv430.jar was not created after cmake [closed]

How to classify image of object on a game board

Memory leak with openCV on android

How to declare a small image for test in openCV Android?

Opencv 4.3.0 build Failure (gradle 6.3 fail twice)

How to best free up DNN and GPU resources when finished?

2 Euro Coin detector which Country is it? Is it front or backside from this coin?

SIGSEGV in libopencv_core.4.1.dylib called from java, works on one machine but not another [closed]

How can i make matchtemplate with threshold (java maeven)

OpenCV 4.2 build with contrib modules java

Displaying UDP Multicast Stream

Find only internal contours in JavaCV/OpenCV

Java: Core.Pow: (-215:Assertion failed) depth == CV_32F || depth == CV_64F

calling mat.copyto and mat.clone in loop causes machine to freeze in java [closed]

How do I make the method onCameraFrame() be called more frequently

from an image having multiple rectangles some rectangles are filled with lines an some are empty like given below in the image.i need to remove all the rectangles which are empty.Any suggestions?

How do I get 0-255 RGB values from an RGBA mat?

OpenCV 4.2: The method drawFrameAxes(Mat, Mat, Mat, Mat, Mat, float) is undefined for the type Calib3d

Upgraded from 3.4.9 to 4.2.0 and can no longer see camera view [Android]

Blob depth should be CV_32F or CV_8U

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