wade wang's profile - activity

Yes, this is mainly a programming stuff (in fact, my major is automotive engineering...). I feel that it is not practica

How to create a new thread for object detection task？ I deploy a DNN in my android app, but the FPS is just 4 that makes

Yes, you are right. Above code will start a new thread for every frame, actually that was not what I want. That was a mi

Yes, you are right. Above code will start a new thread for every frame, actually that was not what I want. That was a mi

How to create a new thread for object detection task？ I deploy a DNN in my android app, but the FPS is just 4 that makes

How to create a new thread for object detection task？ I deploy a DNN in my android app, but the FPS is just 4 that makes

Add cameraBridgeViewBase.setMaxFrameSize(1280, 720); in protected void onCreate(Bundle savedInstanceState) {} is fine

How to build opencv_contrb ? I'm noob...

Hi, Rui Marques, I think your answer may be related to my question（https://answers.opencv.org/question/220053/why-my-app

Sir, when I was about to give up resize, the miracle appeared. I ran the App without resize on the phone again. The prev

I don't quite understand, you mean i can't use Imgproc.resize in public Mat onCameraFrame( ) ? But if i use Imgproc.cvtC

Thanks, berak ! I have move the ”Mat dst = new Mat();“ to outside, and delete "frame.release();". But in this way,i got

Why my App crashes when i applied Imgproc.resize As the illustration shows, now i have the 'original' frame, not fill fu

my opencv version is 3.4.7

In my case, i just add cameraBridgeViewBase.setCameraIndex(1);in the protected void onCreate(Bundle savedInstanceState)

In my case, i just add cameraBridgeViewBase.setCameraIndex(1);in the protected void onCreate(Bundle savedInstanceState)

Sir, your suggestion really works ! Now you can post your last comment as answer, and i will select it as correct ! Haha

Ok, i 'll try it when i get home, i feel you are right and i can make it this time, thanks ! Guru !

Yes, previously i write "return fgMask", i thought the screen could just show the fgMask in the ROI region, but it will

How to do backgroundsub in the ROI of camera in android studio I am going to do a backgroundsubtractor in a ROI area on

problem with opencv.core.mat in android studio I am going to do a backgroundsubtractor in a ROI area on my phone's camer

I am sorry for that, last night i closed the first question is because i change the code afterwards, the error disappear

I am sorry for that, last night i closed the first question is because i change the code afterwards, the error disappear

problem with opencv.core.mat in android studio I am going to do a backgroundsubtractor in a ROI area on my phone's camer

problem with opencv.Imgproc in android studio I am going to do a backgroundsubtractor in a ROI area on my phone's camera

I am sorry for that, last night i closed the first question is because i change the code afterwards, the error disappear

problem with opencv.Imgproc in android studio I am going to do a backgroundsubtractor in a ROI area on my phone's camera

I am sorry for that, last night i closed the first question is because i change the code afterwards, the error disappear

problem with opencv.Imgproc in android studio I am going to do a backgroundsubtractor in a ROI area on my phone's camera

haha, meet you here again !

problem with opencv.Imgproc in android studio I am going to do a backgroundsubtractor in a ROI area, here is part of the

problem with opencv.Imgproc in android studio I am going to do a backgroundsubtractor in a ROI area, here is part of the

problem with opencv.Imgproc in android studio I am going to do a backgroundsubtractor in a ROI area, here is part of the

I am trying to do background subtraction using android phone camera with android studio. I installed OpenCV4Android 3.4.7 and try to use Backgorund Subtraction KNN. I give the camera permission in manifests and can launch the camera correctly. However, I only got white(or blank) screen after run this App on my mobilephone. Here is my part of code:

import org.opencv.video.BackgroundSubtractorKNN;
@Override
    public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
        Mat frame = inputFrame.rgba();
        Mat fgMask = new Mat();
        BackgroundSubtractorKNN backSub = Video.createBackgroundSubtractorKNN();
        Imgproc.cvtColor(frame, frame, Imgproc.COLOR_RGBA2GRAY);
        backSub.apply(frame, fgMask,-1);
        return fgMask;}

Anyone can help me ? Many thanks !

Wow, you are my saviour ！I modified the code according to what you said, it really works now ! You are so nice and so aw

Problem with Background Subtraction KNN in android studio I am trying to do background subtraction using android phone c

Problem with Background Subtraction KNN in android studio I am trying to do background subtraction using android phone c

Problem with Background Subtraction KNN in android studio I am trying to do background subtraction using android phone c