opencv4android

问题 I've worked on this for days now. I have an OpenCV/JavaCameraView-based project I am trying to integrate with an Android android.hardware.camera2.CaptureRequest object I use to control the camera's sensitivity to light. The CameraBridgeViewBase.CvCameraViewListener2/JavaCameraView project works (I can see an image on the screen), and the CaptureRequest project works (see this, too), but combining the two technologies in a single project has proved a big problem. Has anyone gotten these two

问题 I've worked on this for days now. I have an OpenCV/JavaCameraView-based project I am trying to integrate with an Android android.hardware.camera2.CaptureRequest object I use to control the camera's sensitivity to light. The CameraBridgeViewBase.CvCameraViewListener2/JavaCameraView project works (I can see an image on the screen), and the CaptureRequest project works (see this, too), but combining the two technologies in a single project has proved a big problem. Has anyone gotten these two

问题 I managed to open the Android camera using opencv. but when i use the code that fixes the camera orientation -"see the code mentioned below in the onCameraFrame(..) method"- the App crashes after few seconds and the logcat generates the belwo posted messages in the "logcat section". To solve this issue: i tried to use SystemClock.sleep to force the App to dely for a while but this was not a good solution because it delays the camera preview i tried to minimize the frame size as much as i can,

问题 I have integrated OpenCV 4.3.0 in my Android Studio 4.0 application. I have to install the OpenCV Manager on my target Android device to make my application work. I have followed below link to integrate the OpenCV: https://android.jlelse.eu/a-beginners-guide-to-setting-up-opencv-android-library-on-android-studio-19794e220f3c As per the above link, I have the static OpenCV libraries in my Android application. In my code, I just open the camera preview for testing. My application fails to load

问题 I have integrated OpenCV 4.3.0 in my Android Studio 4.0 application. I have to install the OpenCV Manager on my target Android device to make my application work. I have followed below link to integrate the OpenCV: https://android.jlelse.eu/a-beginners-guide-to-setting-up-opencv-android-library-on-android-studio-19794e220f3c As per the above link, I have the static OpenCV libraries in my Android application. In my code, I just open the camera preview for testing. My application fails to load

问题 I have integrated OpenCV 4.3.0 in my Android Studio 4.0 application. I have to install the OpenCV Manager on my target Android device to make my application work. I have followed below link to integrate the OpenCV: https://android.jlelse.eu/a-beginners-guide-to-setting-up-opencv-android-library-on-android-studio-19794e220f3c As per the above link, I have the static OpenCV libraries in my Android application. In my code, I just open the camera preview for testing. My application fails to load

问题 I am trying to work with the open_cv library in android. I have never worked on it before, so this may be a very basic question. I have an opencv_face.LBPHFaceRecognizer object in my Recognizer Activity. My requirement is to read the histogram values for previously-stored faces. opencv_face.LBPHFaceRecognizer mFaceRecognizer = = createLBPHFaceRecognizer(2, 8, 8, 8, 95); File file = new File(RegisterActivity.getFilePath(mContext)); mFaceRecognizer.load(file.getAbsolutePath()); opencv_core

问题 I have an random shape bitmap cut out by user. I want to fade out its borders i.e. contours, so as to make it appear smooth. What should I do? To get the borders and color of every pixel in bitmap, I am traversing it pixel by pixel. It takes long time, still I am ok with it. Is openCV my only option? If yes, can anybody point me towards any tutorial or suggestion for logical approach? 回答1: You can just run a smoothing filter on your shape. In opencv you can use the blur fnnction or

问题 I'm trying to do background subtraction with MOG2 in OpenCV 3.0 on my android phone. However, it seems that there are no suitable constructor to create a new BackgroundSubtractorMOG2 in version 3.0. My code lies down here. @Override public void onCameraViewStarted(int width, int height) { mFrame = new Mat(height, width, CvType.CV_8UC4); mFgMaskMOG = new Mat(height, width, CvType.CV_8UC1); pMOG2 = new BackgroundSubtractorMOG2(); } With these codes Android studio reminds me that the constructor

问题 [UPDATE]: Screenshot has been added. I was following basic tutorial tutorial-1-camerapreview from opencv-3.4.1-android-sdk_4. I want to click on screen and get RGB Color of that x y position. I got help from HERE (Retrieve exact RGB value from touch event in camera preview) : Getting x y coordinates: @SuppressWarnings("deprecation") @Override public boolean onTouchEvent(MotionEvent event) { x = (int)event.getX(); y = (int)event.getY(); return super.onTouchEvent(event); } onCameraFrame as: