Sudoku Solver Using OpenCV in Android
I am currently making an app that lets you solve a Sudoku in real time. The Sudoku image is feeded directly though the camera. I am at the stage of edge detection, but i am stuck at grid detection (I...
View ArticleOpenCv 3.20 for Android. Videowriter and 3rd party libs (ffmpeg)
OpenCv3.20 for Android only allows (for what I have tried and seen in some posts) videowriter to encode .AVI files with fourcc "MJPG" code. Any other options that I have tried result in .isOpened()...
View Articlewhy black resulted image while cropping largest contour from image ?
 @Override public Mat onCameraFrame(Mat inputFrame) { source =inputFrame; contours = new ArrayList(); hierarchy = new...
View ArticleOpencv4android: Runtime Error org.opencv.features2d.DescriptorMatcher.match
I run my application, It's build successes. But when i run on my android device, It's crash. This error from LogCat(See in attach file on this link). I work with Opencv4Android 3.1.0...
View ArticleDetect laser light dot of any colour using OpenCV in Android
I am trying to detect laser light dot of any colour of laser. i have tried some code and it is running perfectly for Only RED colour detection and i want any colour of laser dot detection. I am new in...
View ArticleOpenCv Shared Files (.so) for arm64-v8a
Hello world, I'm having an issue with my android app. I have an error asking for file “libjniopencv_core.so”. so I wanted to add it in the folder JNILibs/arm64-v8a after downloading version 3.1.0...
View Articlecmake/make build of opencv320 for android in Windows 10
( I don't know if it is the right place to post it, so please point me in the right direction if not so.) Has anyone succeeded to build openCV for android in Windows 10 with cmake/make in a clean...
View ArticleTrouble setting up OpenCV with NDK in Android Studio
Hi, I would like to use OpenCV with the NDK in my Android Project. I am using Android Studio. I can't get it to compile properly. I am getting error while including opencv2 in my cpp file..... ** I...
View ArticleAndroid Studio: OpenCV + NDK
Does anyone have a good tutorial on how to use OpenCV in C++ (NDK) with the latest Android Studio?
View ArticleBest way to store a Mat object in Android
What is the best way to store a Mat object in Android? (there is a similar, unanswered, question...
View ArticleJavaCameraView fails on camera.open
Hi, I am trying to run the tutorials at https://github.com/opencv/opencv/tree/master/samples/android in android studio. Since they seem to be made for eclipse i tried copying the essential...
View ArticleOpencl computation time increases after few iterations
I am using opencl module provided by opencv on Qualcomm Snapdragon 805 Inforce 6501.The problem is that the time taken for the execution of opencv's remap function with oclMat after about 20 iterations...
View Articleopencv for android 3.2,no implementation found
error infor: No implementation found for long org.opencv.features2d.DescriptorMatcher.create_0(java.lang.String) (tried Java_org_opencv_features2d_DescriptorMatcher_create_10 and...
View ArticleBest way to store a Mat object in Android
What is the best way to store a Mat object in Android? (there is a similar, unanswered, question...
View ArticleNeed Code: Android OpenCV camera2 capture application
Hello all. I need a simple reference to a code that opens the camera device using API android.hardware.camera2 , and pass the frame to a Mat object for OPENCV processing. All the code I manage to find...
View ArticleDuplicate camera.
Hi everyone! I want to make an app in Android using opencv to apply filters in Camerapreview. My problem is that is a VR aplication (using a google cardboard) and I need to duplicate the camera...
View Articleandroid split camera preview with opencv like cardboard applications
I have a camera preview on my application but i need to split this view to two views like cardborad and samsung gear vr applications but with openCV library to make some filters and image processing...
View ArticleBuild Opencv320 for android with NEON
I could successfully build OpenCV320 for android under Windows10 using cmake, targeting armeabi-v7a and arm64-v8a abis Now I am trying to build it with "armeabi-v7a with NEON" to check performance...
View Articleboolean status = videoCapture.open(path); in Android always false
Working in Andorid App using OpenCV. I trying to open the video using videoCapture. But videoCapture.Open always returning false. Please help
View ArticleConverting set of points in MAT
Given a set of points how can we convert it into MAT format so that openCV apis can be applied. Image is of the following nature and I have points for various features. I have to remove these...
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