Questions - OpenCV Q&A Forum

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2016-04-20 08:43:08 -0600 sturkmen

How to create an ROI (Region-Of-Interest or submat) from a contour?

412

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2016-06-27 14:51:16 -0600 Solace

Why is the drawContour() in OpenCV generating this strange Mask?

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2016-05-27 06:52:08 -0600 WhoAmI

Android Emulator Camera Displaying Blocks

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2016-06-26 09:38:52 -0600 sturkmen

How to draw contours INSIDE the edges of detected shape/blob?

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2016-06-28 00:02:26 -0600 berak

Converting histogram Mat to BitMap - Getting OpenCV Error (src.type() == CV_8UC1 || src.type() == CV_8UC3 || src.type() == CV_8UC4)

883

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2016-06-26 18:46:10 -0600 Solace

Why does calcHist() method create an empty black histogram Mat?

609

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2016-07-13 17:36:08 -0600 Tetragramm

Looking for a way to turn a circle (unfilled) into a line.

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2016-07-23 10:27:27 -0600 Solace

Is it possible to overlay a transparent image over a live camera view, such that it is overlayed over the captured photo as well?

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2016-08-18 09:33:58 -0600 berak

Saving OpenCV images in Android

756

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2016-10-20 08:30:08 -0600 berak

how to detect corners in frames retrieved from Camera

469

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2020-02-04 14:41:44 -0600 zzxjl1

Fatal signal 11 (SIGSEGV), code 2 from knnMatch in OpenCV4Android 3.2

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2017-04-18 13:56:27 -0600 g3org3

Building OpenCV4Android With OpenGL and OpenCL Support

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2018-02-20 04:26:04 -0600 berak

Opencv4Android KCFTracker grayscale

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2012-08-15 15:46:17 -0600 Jeffeb3

Android Surface View Stops Updating [closed]

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2012-10-17 12:29:44 -0600 anaid

batchDistance assert error

333

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2012-10-25 05:28:33 -0600 serfire

how to build opencv engine service package for android [closed]

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2013-03-11 21:25:41 -0600 scylove1989

Preview Frame received. Need to create MAT and deliver it to clients

opencv4android

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2013-03-30 13:51:24 -0600 Dangthrimble

With Android, how do I pass control back to the main thread? [closed]

840

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1

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2013-05-02 09:15:18 -0600 MysticBE

Bruteforce and matching giving reverse results. Why?

850

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1

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2013-05-04 07:40:49 -0600 utkarshmankad

POSE estimation in OpenCv Java using cvFindExtrinsicsCameraParams2

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2013-12-05 10:35:35 -0600 scorpeeon

Best way/place to get timestamp on Android?

410

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2014-01-19 09:03:49 -0600 Azwan

Converting threshold image to binary data [closed]

987

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2014-09-19 10:19:35 -0600 ismail_gz

Error when linking libnative_camera_r2.2.0.so - QT + OpenCV4Android

515

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2014-03-18 09:40:47 -0600 mmisu

OpenCV Manager hardware not recognized

680

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3

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2014-04-18 02:11:31 -0600 Kimi Sun

Is it correct that I didn't generate libopencv_java.so in building OpenCV4Android?

261

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2015-03-04 13:31:53 -0600 Mytheral

Android - Does OpenCV4Android support sortIdx? [closed]

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2015-03-17 08:26:07 -0600 Mytheral

OpenCV4Android - Otsu's Method: Error [closed]

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2015-03-29 06:04:51 -0600 woshijpf

How to Modify OpenCV4Android Source Code to support USB Camera On Android device

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2015-04-05 11:07:27 -0600 nicolausYes

Detect type of document in a real-time

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2015-05-08 09:41:30 -0600 KevinWorkman

148 questions

How to create an ROI (Region-Of-Interest or submat) from a contour?

Why is the drawContour() in OpenCV generating this strange Mask?

Android Emulator Camera Displaying Blocks

How to draw contours INSIDE the edges of detected shape/blob?

Converting histogram Mat to BitMap - Getting OpenCV Error (src.type() == CV_8UC1 || src.type() == CV_8UC3 || src.type() == CV_8UC4)

Why does calcHist() method create an empty black histogram Mat?

Looking for a way to turn a circle (unfilled) into a line.

Is it possible to overlay a transparent image over a live camera view, such that it is overlayed over the captured photo as well?

Saving OpenCV images in Android

how to detect corners in frames retrieved from Camera

Fatal signal 11 (SIGSEGV), code 2 from knnMatch in OpenCV4Android 3.2

Building OpenCV4Android With OpenGL and OpenCL Support

Opencv4Android KCFTracker grayscale

Android Surface View Stops Updating [closed]

batchDistance assert error

how to build opencv engine service package for android [closed]

Preview Frame received. Need to create MAT and deliver it to clients

With Android, how do I pass control back to the main thread? [closed]

Bruteforce and matching giving reverse results. Why?

POSE estimation in OpenCv Java using cvFindExtrinsicsCameraParams2

Best way/place to get timestamp on Android?

Converting threshold image to binary data [closed]

Error when linking libnative_camera_r2.2.0.so - QT + OpenCV4Android

OpenCV Manager hardware not recognized

Is it correct that I didn't generate libopencv_java.so in building OpenCV4Android?

Android - Does OpenCV4Android support sortIdx? [closed]

OpenCV4Android - Otsu's Method: Error [closed]

How to Modify OpenCV4Android Source Code to support USB Camera On Android device

Detect type of document in a real-time

Android4OpenCV: setting resolution at startup

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