Example usage for org.opencv.core Mat Mat

Introduction

In this page you can find the example usage for org.opencv.core Mat Mat.

Prototype

public Mat() 

Source Link

Usage

From source file:ImageReade.java

public static void main(String[] args) {

    // Load an image file and display it in a window.
    Mat m1 = Highgui.imread("H:\\error1.jpg");
    imshow("Original", m1);

    // Do some image processing on the image and display in another window.
    Mat m2 = new Mat();
    Imgproc.bilateralFilter(m1, m2, -1, 50, 10);
    Imgproc.Canny(m2, m2, 10, 200);// www .j  av  a 2  s  . c  om
    imshow("Edge Detected", m2);
    detectLetter(m1);

}

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From source file:ImageReade.java

public static void detectLetter(Mat img) {
    ArrayList<Rect> boundRect = new ArrayList<>();
    Mat img_gray, img_sobel, img_threshold, element;
    img_gray = new Mat();
    img_sobel = new Mat();
    img_threshold = new Mat();
    element = new Mat();
    Imgproc.cvtColor(img, img_gray, Imgproc.COLOR_BGRA2GRAY);
    imshow("Rec img_gray", img_gray);
    Imgproc.Sobel(img_gray, img_sobel, CvType.CV_8U, 1, 0, 3, 1, 0, Imgproc.BORDER_DEFAULT);
    imshow("Rec img_sobel", img_sobel);
    Imgproc.threshold(img_sobel, img_threshold, 0, 255, CV_THRESH_OTSU + CV_THRESH_BINARY);
    imshow("Rec img_threshold", img_threshold);

    element = Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(16, 6));

    Imgproc.morphologyEx(img_threshold, img_threshold, CV_MOP_CLOSE, element);
    imshow("Rec img_threshold second", img_threshold);

    List<MatOfPoint> contours = new ArrayList<MatOfPoint>();

    //Imgproc.findContours(img_threshold, contours, new Mat(), Imgproc.RETR_LIST,Imgproc.CHAIN_APPROX_SIMPLE);
    Imgproc.findContours(img_threshold, contours, new Mat(), 0, 1);

    for (int i = 0; i < contours.size(); i++) {
        System.out.println(Imgproc.contourArea(contours.get(i)));
        //            if (Imgproc.contourArea(contours.get(i)) > 100) {
        //                //Imgproc.approxPolyDP( contours.get(i), contours_poly[i], 3, true );
        //                Rect rect = Imgproc.boundingRect(contours.get(i));
        //                System.out.println(rect.height);
        //                if (rect.width > rect.height) {
        //                    //System.out.println(rect.x +","+rect.y+","+rect.height+","+rect.width);
        //                    Core.rectangle(img, new Point(rect.x,rect.y), new Point(rect.x+rect.width,rect.y+rect.height),new Scalar(0,0,255));
        //                }
        //                    
        //                    
        //            }
        if (Imgproc.contourArea(contours.get(i)) > 100) {
            MatOfPoint2f mMOP2f1 = new MatOfPoint2f();
            MatOfPoint2f mMOP2f2 = new MatOfPoint2f();
            contours.get(i).convertTo(mMOP2f1, CvType.CV_32FC2);
            Imgproc.approxPolyDP(mMOP2f1, mMOP2f2, 3, true);
            mMOP2f2.convertTo(contours.get(i), CvType.CV_32S);
            Rect rect = Imgproc.boundingRect(contours.get(i));
            if (rect.width > rect.height) {
                Core.rectangle(img, new Point(rect.x, rect.y),
                        new Point(rect.x + rect.width, rect.y + rect.height), new Scalar(0, 0, 255));
            }/*from   w  w  w . j a  v a  2s .c om*/
        }
    }
    imshow("Rec Detected", img);
}

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From source file:Questao1.java

public Questao1() {
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

    this.img1 = "lena.jpg";
    this.img2 = "baboon.jpg";

    this.image2 = Imgcodecs.imread(img2);
    this.image1 = Imgcodecs.imread(img1);

    this.image1bin = new Mat();
    this.image2bin = new Mat();

    this.output = new Mat(256, 256, CvType.CV_8UC3);

    showResult(img1);/*from   w  w  w  . j a v  a 2s .  c  om*/
    showResult(img2);

    in = new Scanner(System.in);
    do {
        System.out.println("Escolha a operao: ");
        System.out.println("1 - AND");
        System.out.println("2 - OR");
        System.out.println("3 - XOR");
        System.out.println("4 - NOT");
        System.out.println("5 - SOMA");
        System.out.println("6 - SUBTRAO");
        System.out.println("7 - MULTIPLICAO");
        System.out.println("8 - DIVISO");
        System.out.println("0 - SAIR");

        while ((op = in.nextInt()) != 0) {
            realizarOperacoes();
        }
        if (op == 0) {
            return;
        }
    } while (op < 0 || op > 8);
}

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From source file:OCV_CntrlUvcCamera.java

License:Open Source License

@Override
public void run(ImageProcessor arg0) {
    boolean bret = true;

    // ----- stop dialog during continuous grabbing -----
    diag_free = new JDialog(diag_free, title, false);
    JButton but_stop_cont = new JButton("Stop");

    but_stop_cont.addMouseListener(new MouseAdapter() {
        @Override//from w  w  w.  ja va  2  s  .  c  o m
        public void mouseClicked(MouseEvent e) {
            flag_fin_loop = true;
            diag_free.dispose();
        }
    });

    diag_free.addWindowListener(new WindowAdapter() {
        @Override
        public void windowClosing(WindowEvent e) {
            flag_fin_loop = true;
        }
    });

    diag_free.add(but_stop_cont);
    diag_free.setSize(100, 75);
    // ----- end of stop dialog -----

    // initialize camera
    VideoCapture src_cap = new VideoCapture();
    Mat src_mat = new Mat();
    bret = src_cap.open(device);

    if (!bret) {
        IJ.error("Camera initialization is failed.");
        diag_free.dispose();
        return;
    }

    src_cap.set(CV_CAP_PROP_FRAME_WIDTH, width);
    src_cap.set(CV_CAP_PROP_FRAME_HEIGHT, height);

    // Setting the image display window
    width = (int) src_cap.get(CV_CAP_PROP_FRAME_WIDTH);
    height = (int) src_cap.get(CV_CAP_PROP_FRAME_HEIGHT);

    ImagePlus impDsp = IJ.createImage(title, width, height, 1, 24);

    int[] impdsp_intarray = (int[]) impDsp.getChannelProcessor().getPixels();

    impDsp.show();
    impDsp.setRoi(0, 0, impDsp.getWidth(), impDsp.getHeight());

    // show stop dialog
    diag_free.setVisible(true);

    // run
    for (;;) {
        if (flag_fin_loop) {
            break;
        }

        // grab
        impDsp.startTiming();
        bret = src_cap.read(src_mat);
        IJ.showTime(impDsp, impDsp.getStartTime(), title + " : ");

        if (!bret) {
            IJ.error("Error occurred in grabbing.");
            diag_free.dispose();
            break;
        }

        if (src_mat.empty()) {
            IJ.error("Mat is empty.");
            diag_free.dispose();
            break;
        }

        // display
        if (src_mat.type() == CvType.CV_8UC3) {
            OCV__LoadLibrary.mat2intarray(src_mat, impdsp_intarray, width, height);
        } else {
            IJ.error("Color camera is supported only.");
            diag_free.dispose();
            break;
        }

        impDsp.draw();

        // wait
        wait(wait_time);
    }

    diag_free.dispose();

    if (src_cap.isOpened()) {
        src_cap.release();
    }
}

---

From source file:Questao2.java

void media() {
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    String url = escolherUrl();/*w w w.  ja v  a  2 s .com*/

    /**
     * Transforma imagem em matriz para facilitar manipulacao
     */
    Mat img = Imgcodecs.imread(url);
    /**
     * Cria matriz de destino
     */
    Mat dst = new Mat();
    /**
     * Aplicacao do filtro da media
     * blur(matriz original, matriz destino, tamanho da mascara)
     */

    System.out.println("Escolha as dimenses da mscara: ");
    System.out.print("X: ");
    int mx = in.nextInt();
    System.out.print("Y: ");
    int my = in.nextInt();

    Imgproc.blur(img, dst, new Size(mx, my));
    /**
     * Salva o resultado em media.jpg
     */
    Imgcodecs.imwrite("media.jpg", dst);
    showResult("media.jpg");
}

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From source file:Questao2.java

void mediana() {
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

    String url = escolherUrl();/*from www  .  j ava 2 s  .c  om*/
    /**
     * Transforma imagem em matriz para facilitar manipulacao
     */
    Mat img = Imgcodecs.imread(url);
    /**
     * Cria matriz de destino
     */
    Mat dst = new Mat();
    /**
     * Aplica filtro da mediana
     * medianBlur(imagem original, imagem destino, ksize)
     */
    System.out.print("K-size: ");
    int ksize = in.nextInt();
    Imgproc.medianBlur(img, dst, ksize);
    /**
     * Salva resultado em mediana.jpg
     */
    Imgcodecs.imwrite("mediana.jpg", dst);
    showResult("mediana.jpg");
}

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From source file:Questao2.java

void gaussiano() {
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    String url = escolherUrl();//from w  w  w .  jav a 2 s. c o  m

    /**
     * Transforma imagem em matriz para facilitar manipulacao
     */
    Mat img = Imgcodecs.imread(url);
    /**
     * Cria matriz de destino
     */
    Mat dst = new Mat();
    /**
     * Aplica o filtro gaussiano
     * GaussianBlur(imagem original, imgagem destino, tamanho da mascara, sygmaX, sygmaY)
     */
    System.out.println("Dimenses da mscara: ");
    System.out.print("X: ");
    int mx = in.nextInt();
    System.out.print("Y: ");
    int my = in.nextInt();

    System.out.println("Valores Sygma: ");
    System.out.print("X: ");
    int sx = in.nextInt();
    System.out.print("Y: ");
    int sy = in.nextInt();
    Imgproc.GaussianBlur(img, dst, new Size(mx, my), sx, sy);
    /**
     * Salva resultado em gaussian-blur.jpg
     */
    Imgcodecs.imwrite("gaussian-blur.jpg", dst);
    showResult("gaussian-blur.jpg");
}

---

From source file:Questao2.java

void maximo() {
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

    String url = escolherUrl();/*from   w w w .  j av  a  2s  . c o  m*/
    /**
     * Transforma imagem em matriz para facilitar manipulacao
     */
    Mat img = Imgcodecs.imread(url);
    /**
     * Cria matriz destinoo
     */
    Mat dst = new Mat();
    /**
     * Cria imagem com o valor 1 em todos os pixels de
     * tamnho escolhido pelo usuario
     */
    System.out.println("Digite as dimenses da mscara: ");
    System.out.print("X: ");
    int mx = in.nextInt();
    System.out.print("Y: ");
    int my = in.nextInt();
    Mat one = Mat.ones(mx, my, CvType.CV_32F);
    /**
     * Aplica o filtro maximo utilizando a matriz one como mascara
     * dilate(imagem original, imagem destino, mascara)
     */
    Imgproc.dilate(img, dst, one);
    /**
     * Salva o resultado na matriz maximo.jpg
     */
    Imgcodecs.imwrite("maximo.jpg", dst);
    showResult("maximo.jpg");
}

---

From source file:Questao2.java

void minimo() {
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

    String url = escolherUrl();//from   w  w w .j a va2s . c  o m
    /**
     * Transforma imagem em matriz para facilitar manipulacao
     */
    Mat img = Imgcodecs.imread(url);
    /**
     * Cria matriz de destino
     */
    Mat dst = new Mat();
    /**
     * Cria matriz com o valor 1 em todos os pixels de
     * tamanho definido pelo usuario
     */
    System.out.println("Digite as dimenses da mscara: ");
    System.out.print("X: ");
    int mx = in.nextInt();
    System.out.print("Y: ");
    int my = in.nextInt();
    Mat one = Mat.ones(mx, my, CvType.CV_32F);
    /**
     * Aplica o filtro minimo
     * erode(imagem original, imagem destino, matriz de mascara)
     */
    Imgproc.erode(img, dst, one);
    /**
     * Salva resultado em minimo.jpg
     */
    Imgcodecs.imwrite("minimo.jpg", dst);
    showResult("minimo.jpg");
}

---

From source file:OCV__LoadLibrary.java

License:Open Source License

private boolean isLoadOpenCV() {
    try {//from   w ww  .  j a  v  a 2s . c  o  m
        if (dummy != null) {
            //IJ.showMessage("dummy is release");
            dummy.release();
        }

        //IJ.error("dummy = new Mat()");
        dummy = new Mat();

        return true;
    } catch (Throwable ex) {
        //IJ.error("ERR : " + ex.getMessage());
        return false;
    }
}

---

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