Example usage for org.opencv.core Mat get

Introduction

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

Prototype

public int get(int row, int col, double[] data)

Source Link

Usage

From source file:video.Mat2Image.java

BufferedImage getImage(Mat mat) {
    getSpace(mat);
    mat.get(0, 0, dat);
    img.getRaster().setDataElements(0, 0, mat.cols(), mat.rows(), dat);

    return img;
}

From source file:video.PictureView.java

public static BufferedImage mat2Img(Mat in) {
    BufferedImage out;//  w  w w.j  av  a  2  s. co  m
    int width = in.cols();
    int height = in.height();
    byte[] data = new byte[width * height * (int) in.elemSize()];
    int type;
    in.get(0, 0, data);

    if (in.channels() == 1) {
        type = BufferedImage.TYPE_BYTE_GRAY;
    } else {
        type = BufferedImage.TYPE_3BYTE_BGR;
    }

    out = new BufferedImage(width, height, type);

    out.getRaster().setDataElements(0, 0, width, height, data);
    return out;
}

From source file:videostream.MulticastServer.java

/**
 * Transforms an OpenCV mat to a byte array
 * @param m The mat to transform/*from www  .  j  a  va 2  s.c  o  m*/
 * @param format The desired format
 * @return The mat transformed to a byte array
 * @throws IOException 
 */
public byte[] matToByteArray(Mat m, String format) throws IOException {
    // Check if image is grayscale or color
    int type = BufferedImage.TYPE_BYTE_GRAY;
    if (m.channels() > 1) {
        type = BufferedImage.TYPE_3BYTE_BGR;
    }
    // Transfer bytes from Mat to BufferedImage
    int bufferSize = m.channels() * m.cols() * m.rows();
    byte[] b = new byte[bufferSize];
    m.get(0, 0, b); // get all the pixels
    BufferedImage image = new BufferedImage(m.cols(), m.rows(), type);
    final byte[] targetPixels = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
    System.arraycopy(b, 0, targetPixels, 0, b.length);

    Iterator iter = ImageIO.getImageWritersByFormatName("jpeg");
    ImageWriter writer = (ImageWriter) iter.next();
    ImageWriteParam iwp = writer.getDefaultWriteParam();

    iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    iwp.setCompressionQuality(quality);

    ByteArrayOutputStream baos1 = new ByteArrayOutputStream();
    ImageOutputStream ios = ImageIO.createImageOutputStream(baos1);
    writer.setOutput(ios);
    IIOImage Iimage = new IIOImage(image, null, null);
    writer.write(null, Iimage, iwp);
    writer.dispose();

    return baos1.toByteArray();

}

From source file:videostream.MyFrame.java

public Image toBufferedImage(Mat m) {
    // Code from http://stackoverflow.com/questions/15670933/opencv-java-load-image-to-gui

    // Check if image is grayscale or color
    int type = BufferedImage.TYPE_BYTE_GRAY;
    if (m.channels() > 1) {
        type = BufferedImage.TYPE_3BYTE_BGR;
    }//  w  ww .j av  a2s.  com
    // Transfer bytes from Mat to BufferedImage
    int bufferSize = m.channels() * m.cols() * m.rows();
    byte[] b = new byte[bufferSize];
    m.get(0, 0, b); // get all the pixels
    BufferedImage image = new BufferedImage(m.cols(), m.rows(), type);
    final byte[] targetPixels = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
    System.arraycopy(b, 0, targetPixels, 0, b.length);
    return image;
}

From source file:webcamfacedetect.FaceDetect.java

/**
 * Converts/writes a Mat into a BufferedImage.
 *
 * @param matrix Mat of type CV_8UC3 or CV_8UC1
 * @return BufferedImage of type TYPE_3BYTE_BGR or TYPE_BYTE_GRAY
 *///from ww w .  j a v  a  2 s.  c  o  m
public boolean MatToBufferedImage(Mat matBGR) {
    long startTime = System.nanoTime();
    int width = matBGR.width(), height = matBGR.height(), channels = matBGR.channels();
    byte[] sourcePixels = new byte[width * height * channels];
    matBGR.get(0, 0, sourcePixels);
    // create new image and get reference to backing data  
    image = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
    final byte[] targetPixels = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
    System.arraycopy(sourcePixels, 0, targetPixels, 0, sourcePixels.length);
    long endTime = System.nanoTime();
    //System.out.println(String.format("Elapsed time: %.2f ms", (float) (endTime - startTime) / 1000000));
    return true;
}