Python OpenCV stream to Android Studio
Hi everyone, Is there any way where I can stream a live video from python opencv (code from https://www.pyimagesearch.com/2017/09/18/real-time-object-detection-with-deep-learning-and-opencv/) to...
View ArticleHow do I properly build Android OpenCV from sources?
The end goal is to build opencv with contrib for Android, but i cant seem to get the build_sdk.py script to even work without the --extra_pack flag I've downloaded build Tools 25.0.3, sdk tools...
View Article[HELP] CvException @ Dnn.forward() in Android
I'm trying to implement Gil Levi and Tal Hassner.Age and Gender Classification Using Convolutional Neural Networks to Android app but I'm getting an error on Dnn.forward(). I followed this...
View ArticleAndroid Object tracking
I'm building an Android based OpenCV application that needs to track objects. I was reading an article on pyimagesearch that uses various object tracking implementations (KCF, CSRT, MOSSE, etc) that...
View ArticleOpenCV Java How can I find red lined Rectangles from 12 rectangles.
I am running into a very unique problem statement. I have an image which will have 12 led lights and a few out of them will glow as red. After trying out multiple algorithms, I have reached till this...
View ArticleRun the official face-detection sample and find the problem
**System information (version)** OpenCV => 3.4 Operating System / Platform => Android Compiler => cmake **Detailed description** Run the official face-detection sample and find that the value...
View ArticleAndroid studio failed build NDK project: error finished with non-zero exit...
I'm running into this error:> Process 'command 'C:/Users/cvlab/AppData/Local/Android/Sdk/ndk-bundle/ndk-build.cmd'' finished with non-zero exit value 2 This is my gradle file of the project: apply...
View ArticleIs prebuilt OpenCV by default come with Neon on Android ?
I want enable Neon optimization for armebi-v7a and arm64-v8a architecture on android but I can't figure Is OpenCV prebuilt libs come with Neon ? Or I should build it from source code? If yes, which...
View ArticleUMat implementations slower than Mat
Hi. I have made an OpenCV based application using C++ and successfully run it on Android using NDK. It uses camera input for processing. Right now the fps on PC with core i5 using only CPU is about 27...
View ArticleFaceRecognizer Parameter problem of the train method
**Android project environment!** I see the official example, the two parameters passed in are **vector< Mat> images and vector< int> labels**; code below: vector images; vector labels; //...
View ArticleAndroid developmenet with Opencv 2.4.13.6 slower than Opencv 3.4.2?
While trying to develop a vehicle detector in Android, I had to shift to OpenCV 2.4.13.6 in order to use HOG cascade as a classifier. On doing so I have experienced a fall in speed from 12 frames per...
View ArticleAndroid JavaCameraView - Huge frame rate drop in newer APIs
I'm working on a simple application that get frames from my smartphone camera. When my phone has older APIs (24 and below) I always used to get 30 fps, since none image processing was being done. For...
View ArticleImage Processing: Removing noise of processed image OPENCV - JAVA
I have process an image for OCR, I encountered a problem where the processed image has too much noise. I am a beginner in this type of programming and Im just wondering if you guys can help me denoise...
View Articlehow to convert int array to mat in android?
***how to convert int array to Mat in android?***
View ArticleJAVA - Removing noise of processed image OPENCV
I have process an image for OCR, I encountered a problem where the processed image has too much noise. I am a beginner in this type of programming and Im just wondering if you guys can help me denoise...
View Articleface recognize occur error in execute train method.
**detail code :** private LoaderCallbackInterface mLoaderCallback = new LoaderCallbackInterface() { @Override public void onManagerConnected(int status) { if (status==LoaderCallbackInterface.SUCCESS){...
View ArticleIllegal argument exception and thread issues on lockCanvas
I am attempting to take a picture, and in the onPictureTaken I atempt to make some layout changes and then pass the image data to a new activity. When making layout changes the app crashes with an...
View ArticleWhere is the lib file **mixed_sample.so** ?
I'm trying to compile the tutorial-2-mixedprocess application in android, this application comes with the sdk. But my application crashes when it tries to load **mixed_sample** // Load native library...
View ArticleHow do I support c++11 in Opencv 3 Android NDK
Hi, all I am doing the next changes to support c++11 with opencv 3 in android NDK: I change from APP_STL := gnustl_static to APP_STL := c++_static Application.mk APP_STL := c++_static APP_CPPFLAGS :=...
View ArticleOpenCV Manager: Item not Found
The OpenCV docs says:> In most cases OpenCV Manager may be> installed automatically from Google> Play. For the case, when Google Play> is not available, i.e. emulator,> developer board,...
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