Questions - OpenCV Q&A Forum

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2020-01-02 08:06:43 -0600 Gourav

Error while implementing the "out of focus deblur tutorial" in java

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1

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2020-01-03 07:05:22 -0600 supra56

java.lang.UnsupportedOperationException: Mat data type is not compatible: 6[SOLVED]

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1

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2020-01-06 09:37:59 -0600 Gourav

Java (-215:Assertion failed) mv[i].size == mv[0].size && mv[i].depth() == depth in function 'cv::merge'

java
merge

443

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2020-01-09 10:22:36 -0600 aironman

Error when I try to run Hello World OpenCV sample using java and eclipse

215

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2020-01-12 05:34:37 -0600 Gourav

Difference in output of same c++ and Java function in OpenCV

Video
java

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1

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2020-01-24 09:44:22 -0600 robertodaza

VideoCapture (0) does not work in mac Catalina. The program crashed

2k

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1

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1

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2020-01-29 02:58:57 -0600 berak

Face recognition app for android (OpenCV)

586

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2020-02-11 11:59:26 -0600 Tarcisioflima

Converting Mat to one dimensional float array for EM?

854

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2020-02-24 05:27:22 -0600 krjeev

Blob depth should be CV_32F or CV_8U

260

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2020-02-25 07:25:11 -0600 Jonaskri

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

348

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1

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no

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2020-02-25 07:36:31 -0600 rm_ein

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

4k

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1

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2020-02-27 09:06:05 -0600 PressedTin

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

179

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2020-02-28 14:44:41 -0600 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?

450

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2020-02-28 16:05:04 -0600 PressedTin

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

447

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2020-03-06 03:26:55 -0600 supra56

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

1k

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2020-03-23 17:51:04 -0600 ssokolow

Find only internal contours in JavaCV/OpenCV

1k

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1

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no

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2020-03-17 15:01:25 -0600 DrThrax

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

2k

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1

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2020-03-28 05:49:53 -0600 otoker

Displaying UDP Multicast Stream

432

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-1

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2020-03-28 10:44:17 -0600 katabolerTeufel

OpenCV 4.2 build with contrib modules java

152

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-1

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2020-04-05 13:25:52 -0600 lencls

How can i make matchtemplate with threshold (java maeven)

261

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2020-04-07 04:44:43 -0600 gaby

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

1k

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2020-04-13 12:28:54 -0600 dhirwinjr

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

1k

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2

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1

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2020-04-27 01:45:58 -0600 pivdet

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

264

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2020-04-26 20:07:02 -0600 LiorA

Opencv 4.3.0 build Failure (gradle 6.3 fail twice)

489

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2020-05-01 03:41:04 -0600 JulesHummelink

Memory leak with openCV on android

477

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2020-05-04 22:01:39 -0600 Altheim

How to classify image of object on a game board

963

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2020-05-06 08:13:15 -0600 thor2.7182

Opencv430.jar was not created after cmake [closed]

180

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2020-06-01 10:44:02 -0600 kamadi

issue training using lbph model

295

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2020-06-01 23:08:50 -0600 muas

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

java
opencv

410

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1

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1

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2020-06-12 06:51:33 -0600 Miorii

1,159 questions

Error while implementing the "out of focus deblur tutorial" in java

java.lang.UnsupportedOperationException: Mat data type is not compatible: 6[SOLVED]

Java (-215:Assertion failed) mv[i].size == mv[0].size && mv[i].depth() == depth in function 'cv::merge'

Error when I try to run Hello World OpenCV sample using java and eclipse

Difference in output of same c++ and Java function in OpenCV

VideoCapture (0) does not work in mac Catalina. The program crashed

Face recognition app for android (OpenCV)

Converting Mat to one dimensional float array for EM?

Blob depth should be CV_32F or CV_8U

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

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

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

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 make the method onCameraFrame() be called more frequently

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

Find only internal contours in JavaCV/OpenCV

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

Displaying UDP Multicast Stream

OpenCV 4.2 build with contrib modules java

How can i make matchtemplate with threshold (java maeven)

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

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

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

Opencv 4.3.0 build Failure (gradle 6.3 fail twice)

Memory leak with openCV on android

How to classify image of object on a game board

Opencv430.jar was not created after cmake [closed]

issue training using lbph model

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

ORB model conversion from python to java

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