Kitnos's profile - activity

BackgroundSubtractorMOG2 returns a gray image Hello, I need your help, I am trying to apply BackgroundSubtractorMOG2 t

BackgroundSubtractorMOG2 returns a gray image Hello, I need your help, I am trying to apply BackgroundSubtractorMOG2 t

Hi, sorry if I am late, I have tried your image with different feature detectors (ORB, SIFT,...) and I am getting the sa

Did you find a solution for your problem? If not, can you add pls the original image to do some tests and see if I can f

Read all jpg images from a folder with glob except 2 images Hello, I am using glob that exist in the file utility.hpp of

The meaning of minHessian in SIFT Hello, I have a question about minhessian in SIFT that i can't find an answer. I rea

The meaning of minHessian in SIFT Hello, I have a question about minhessian in SIFT that i can't find an answer. I rea

The meaning of minHessian in SIFT Hello, I have a question about minhessian in SIFT that i can't find an answer. I rea

@Greydel Yes, that's the last solution that I have. I will add some "marking colors", for example a red small rectangle

Thank you, I fixed my problem, but there is still a weird behavior of the code that I do not understand(Edit 1).

Problem displaying rectangle in a callBack function Hello, I am trying to create a window with Opencv that display a vi

Problem displaying rectangle in a callBack function Hello, I am trying to create a window with Opencv that display a vi

@berak Thank you for your response, what do you think about edit 1?

Knn for keypoints and descriptors of SIFT Hello, I have a lot of images, let's say for example 3 images who I extract K

Knn for keypoints and descriptors of SIFT Hello, I have a lot of images, let's say for example 3 images who I extract K

Knn for keypoints and descriptors of SIFT Hello, I have a lot of images, let's say for example 3 images who I extract K

Knn for keypoints and descriptors of SIFT Hello, I have a lot of images, let's say for example 3 images who I extract K

Knn for keypoints and descriptors of SIFT Hello, I have a lot of images, let's say for example 3 images who I extract K

Knn for keypoints and descriptors of SIFT Hello, I have a lot of images, let's say for example 3 images who I extract K

Hello,

I am trying to create a window with Opencv that display a video stream and above a rectangle (gray rectangle), my goal is to save the image of the current video stream when the user click on the gray rectangle, but I can't figure out how to pass the Mat "img" to the callback function to save it:

 #include <opencv2\opencv.hpp>
 #include <iostream>
 using namespace cv;
 using namespace std;
Mat3b canvas;
string buttonText("Save an  image!");
string winName = "My cool GUI v0.1";    
Rect button;   

void callBackFunc(int event, int x, int y, int flags, void* userdata)
{
    if (event == EVENT_LBUTTONDOWN)
    {
        if (button.contains(Point(x, y)))
        {
            cout << "Clicked!" << endl;
            rectangle(canvas(button), button, Scalar(0, 0, 255), 2);
        }
    }
    if (event == EVENT_LBUTTONUP)
    {
        rectangle(canvas, button, Scalar(200, 200, 200), 2);
    }

    imshow(winName, canvas);
    waitKey(1);
}

int main()
{
    Mat img;
    VideoCapture cap(0); //caméra par défault
    for (;;)
    {
        cap >> img; // get a new frame from camera      
        while (img.empty()) {
            std::cout << "Frame empty" << std::endl;
            continue;
        }
        //cout << "Resolution" << img.size() << endl;        

        // Your button
        button = Rect(0, 0, img.cols, 50);

        // The canvas
        canvas = Mat3b(img.rows + button.height, img.cols, Vec3b(0, 0, 0));

        // Draw the button
        canvas(button) = Vec3b(200, 200, 200);
        putText(canvas(button), buttonText, Point(button.width*0.35, button.height*0.7), FONT_HERSHEY_PLAIN, 1, Scalar(0, 0, 0));

        // Draw the image
        img.copyTo(canvas(Rect(0, button.height, img.cols, img.rows)));

        // Setup callback function
        namedWindow(winName);
        setMouseCallback(winName, callBackFunc);

        imshow(winName, canvas);
            waitKey(1);
    }

    return 0;
}

I need your help and thank you

Save image using callBack Function Hello, I am trying to create a window with Opencv that display a video stream and a

Save image using callBack Function Hello, I am trying to create a window with Opencv that display a video stream and a

@berak I have tested it, and according to my tests Zbar (version 0.10) is more stable than cv::QRCodeDetector (4.1.0 ver

Camera pose estimation with QR code by Opencv Hello, I am detecting a QR code with ZBAR library, and I have as informat

I will try "generalize hough for edge based template matching". I already tested SIFT and SURF and ORB and they do not w

Thank you for your answer, unfortunately my camera is not fixed

Detect valve position without colors on a video Hello, I can't find a solution for my problem and I need your help. I h

Detect valve position without colors on a video Hello, I can't find a solution for my problem and I need your help. I h

Real time video problem I need some help if you can help me. I have to create a real-time application (video stream) tha

SIFT between 1 image and dataset (2 images) Hello, I use SIFT, and I want to find the angle of inclination of an image

Sorry my diagram was not very clear i edit it now

SIFT between 1 image and dataset (2 images) Hello, I use SIFT, and I want to find the angle of inclination of an image

Image 1 and 2 are the same image, with a difference in scale or angle, I want to extract keypoint and descriptor from th

Image 1 and 2 are the same image, with a difference in scale or angle, I want to extract keypoint and descriptor from th

SIFT between 1 image and dataset (2 images) Hello, I use SIFT, and I want to find the angle of inclination of an image

sift between 1 image and dataset (2 images) Hello, I use SIFT, and I want to find the angle of inclination of an image

sift between 1 image and dataset (2 images) Hello, I use SIFT, and I want to find the angle of inclination of an image

Yes it will work in real time video, but this method (color filtering ), will detect only one long rectangle that englob

If you add an image it'll be more clear. I have only a C++ code to detect colors and draw bounding box search in the in

If you add an image it'll be more clear. I have only a C++ code to detect colors and draw bounding box search in the in

If you add an image it'll be more clear. I have only a C++ code to detect colors and draw bounding box search in the in

If you add an image it'll be more clear. I have only a C++ code to detect colors and draw bounding box search in the in