Why OpenCV4Android VideoCapture cannot open filename in android
I am new to Opencv4Android, now I want to use android to open a file from android device by filename, The codes are like below: VideoCapture cap; cap.open("/mnt/sdcard/DCIM/Camera/demo.mp4"); I found...
View Articlehow to use opencv with android studio
it is very complex for new user of opencv to integrate it with android studio, because there is no official docs for that. So If any one know how to integrate it with android studio. please share the...
View ArticleIs static initialization of Opencv LIbraries possible in Android Studio for...
Hii all.. Im working on a face recognition android app which uses opencv library 2.4.9 devoloped in Android Studio-2.1.1. I would like to know static initialization of Opencv setup in Android studio...
View ArticleOpenCV Tutorial 2 - Mixed Processing Modification
I am trying to modify OpenCV Tutorial 2 - Mixed Processing Modification sample application for Android. The "Find Features" function is very useful, but I need the app to display some value that...
View ArticleHow to force "org.opencv.android.JavaCameraView" preview to be full screen
Hi, I am trying to set org.opencv.android.JavaCameraView to be full screen, but its not working, This is main xml: This is the manifest: The main activity: public class MainActivity extends Activity...
View ArticleWrite and read Matt descriptor in SQLite
How can I record a Mat with descriptor information from a SURF in a column in SQLite? surf->detectAndCompute(matImage, Mat(), keyPoints, matDescriptor, false); And how to read this data and...
View ArticleFind rectangle from image in android?
hello, i want to find four black cornered rectangle from below image  how to find those four border rectangle from this image? i have tried with this...
View ArticleFace recognizer with camera in portrait mode
Hello. I am running the following https://github.com/ayuso2013/face-recognition in Android Studio (Through the link found in the Readme.md). I am not sure what the fault is that is why i am putting in...
View ArticleExpose native C++ OpenCV code to Android - but clever (== less work) way!
Hi fellow coders! I've written desktop OpenCV-based C++ app that can be described as following blackbox sequence: Image from camera -> A LOT OF PROCESSING HERE -> std::tuple eyesPosition, bool...
View Articledlopen libopencv_java3.so failed using java.lang.System.loadLibrary
i encounter a question that loading libopencv_java3.so failed after i update the android version into N. This open lib can be loaded correctly on android M version. libopencv_java3 is got directly from...
View ArticleVery bad fps using Surf in Android
I'm trying to build an android app which detects a particular object in real time using SURF but I'm getting very bad fps (~0.2fps). I have little idea about OpenCv so please suggest what I can do or...
View ArticleError:Execution failed for task ':app:ndkBuildArmeabiV7aHardDebug'. > Process...
Hi I am currently trying to run my Android Studio application and I am getting this error during compilation. I think the erro has to do something with the build gradle. Can someone help me solve this...
View Articlehow to use opencv4android pca to train svm model?
classification problem is static hand gesture recognition for android smart phones. my problem is I am new with openCV so I want to know if pca is the best feature extraction technique for this...
View ArticleDifferent Behavior Of Native Code In Android
(/upfiles/1466700474222065.png) I am trying to...
View ArticleSIGSEGV on Android with first use of OpenCV after restarting an Activity
I've run into weird problem. To keep things short: I've written an Android app that utilizes OpenCV with two Activities: **Activity1** previews front camera and on user click starts Activity2, sending...
View ArticleBuilding android java bindings
Hi, I'm trying to build a jar file containing the java bindings. I've tried git clone git://github.com/Itseez/opencv.git cd opencv mkdir build cd build cmake -DBUILD_SHARED_LIBS=OFF .. make -j8 which...
View ArticleUsing OpenCV on android without preview
Hi, I went through a couple of the provided OpenCV examples provided here: https://github.com/Itseez/opencv/tree/master/samples/android It seems, all of them actually build an activity that implements...
View ArticleHow to use native camera with Android?
Hi, I'm trying to use the native camera with android (tried on 6.0.1 and 5.1.1) mCamera = new VideoCapture(mCameraId); if (!mCamera.isOpened()) { Log.d(TAG, "Failed to open camera " + mCameraId); }...
View ArticleHow I detect marker using OpenCV for android
hi, recently I learned OpenCV for android to make the marker-based augmented reality applications, I found the book Android Application Programming with OpenCV 3 and there are cases where the...
View ArticleWhen Android studio compatible opencv version will be released?
Hi, I just want to know that when Android studio compatible opencv version will be released?
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