Suspect I'm doing evil and want to know the right way.
I'm needing to copy a MAT of type CV_8UC3 into a Java BufferedImage. I was offered some code to do this, but it's taking excessive time - 34msec/frame for 640x480 image on my 8 core i7 The code (below) gets each pixel from the Mat via a get call. commenting out this line reduces conversion time to 3msec. Is there a way to get pixels in bigger batches? I'm new to OpenCV in Java, may be missing something simple.
condensing a bit
public static BufferedImage matToBufferedImage(Mat bgr) {
int width = bgr.width();
int height = bgr.height();
BufferedImage image;
WritableRaster raster;
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
raster = image.getRaster();
byte[] px = new byte[3];
int[] rgb = new int[3];
for (int y=0; y<height; y++) {
for (int x=0; x<width; x++) {
// this operation is really inefficient!
bgr.get(y,x,px);
rgb[0] = px[2];
rgb[1] = px[1];
rgb[2] = px[0];
raster.setPixel(x,y,rgb);
}
}