Convert BufferedImage TYPE_INT_RGB to OpenCV Mat Object

问题

I am storing BufferedImages inside a MySQL database and retrieve them to a java application.

The BufferedImages are of type TYPE_INT_RGB.

How can i convert that image to a OpenCV Mat object?

I do always get a

java.lang.UnsupportedOperationException: Mat data type is not compatible: 

Exception.

Can somebody help?

回答1:

Got it on my own.

    int[] data = ((DataBufferInt)image.getRaster().getDataBuffer()).getData();
    ByteBuffer byteBuffer = ByteBuffer.allocate(data.length * 4); 
    IntBuffer intBuffer = byteBuffer.asIntBuffer();
    intBuffer.put(data);

    Mat mat = new Mat(image.getHeight(), image.getWidth(), CvType.CV_8UC3);
    mat.put(0, 0, byteBuffer.array());
    return mat;

image is the BufferedImage, you want to convert to a Mat-Object.

回答2:

A much more simplified version of tellob's orignal anwser.

public static Mat mat2(BufferedImage image)
{
    byte[] data = ((DataBufferByte)image.getRaster().getDataBuffer()).getData();
    Mat mat = new Mat(image.getHeight(), image.getWidth(), CvType.CV_8UC3);
    mat.put(0, 0, data);
    return mat;
}

来源：https://stackoverflow.com/questions/21175336/convert-bufferedimage-type-int-rgb-to-opencv-mat-object