/**
* Finds the center point of a given contour.
*
* @param contour The contour who's center is to be calculated
* @return The coordinates of the center as a Point
*/
private Point findCenter(MatOfPoint contour) {
// get moments
Moments m = new Moments();
m = Imgproc.moments(contour, true);
// get mass center
Point mc;
mc = new Point(m.get_m10() / m.get_m00(), m.get_m01() / m.get_m00());
return mc;
}
public static void main(String[] args) {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
// Mat mat = Mat.eye( 3, 3, CvType.CV_8UC1 );
// System.out.println( "mat = " + mat.dump() );
Sample n = new Sample();
// n.templateMatching();
// put text in image
// Mat data= Highgui.imread("images/erosion.jpg");
// Core.putText(data, "Sample", new Point(50,80), Core.FONT_HERSHEY_SIMPLEX, 1, new
// Scalar(0,0,0),2);
//
// Highgui.imwrite("images/erosion2.jpg", data);
// getting dct of an image
String path = "images/croppedfeature/go (20).jpg";
path = "images/wordseg/img1.png";
Mat image = Highgui.imread(path, Highgui.IMREAD_GRAYSCALE);
ArrayList<MatOfPoint> contours = new ArrayList<MatOfPoint>();
Imgproc.threshold(image, image, 0, 255, Imgproc.THRESH_OTSU);
Imgproc.threshold(image, image, 220, 128, Imgproc.THRESH_BINARY_INV);
Mat newImg = new Mat(45, 100, image.type());
newImg.setTo(new Scalar(0));
n.copyMat(image, newImg);
int vgap = 25;
int hgap = 45 / 3;
Moments m = Imgproc.moments(image, false);
Mat hu = new Mat();
Imgproc.HuMoments(m, hu);
System.out.println(hu.dump());
// //divide the mat into 12 parts then get the features of each part
// int count=1;
// for(int j=0; j<45; j+=hgap){
// for(int i=0;i<100;i+=vgap){
// Mat result = newImg.submat(j, j+hgap, i, i+vgap);
//
//
// Moments m= Imgproc.moments(result, false);
// double m01= m.get_m01();
// double m00= m.get_m00();
// double m10 = m.get_m10();
// int x= m00!=0? (int)(m10/m00):0;
// int y= m00!=0? (int)(m01/m00):0;
// Mat hu= new Mat();
// Imgproc.HuMoments(m, hu);
// System.out.println(hu.dump());
// System.out.println(count+" :"+x+" and "+y);
// Imgproc.threshold(result, result, 0,254, Imgproc.THRESH_BINARY_INV);
// Highgui.imwrite("images/submat/"+count+".jpg", result);
// count++;
//
// }
// }
//
// for(int i=vgap;i<100;i+=vgap){
// Point pt1= new Point(i, 0);
// Point pt2= new Point(i, 99);
// Core.line(newImg, pt1, pt2, new Scalar(0,0,0));
// }
// for(int i=hgap;i<45;i+=hgap){
// Point pt1= new Point(0, i);
// Point pt2= new Point(99, i);
// Core.line(newImg, pt1, pt2, new Scalar(0,0,0));
// }
// Highgui.imwrite("images/submat/copyto.jpg", newImg);
}
public Point findLaser(Mat inputFrame) {
Mat mHsv = new Mat();
Imgproc.cvtColor(inputFrame, mHsv, Imgproc.COLOR_RGB2HSV);
// Find laser center
Mat center = new Mat();
Core.inRange(mHsv, new Scalar(0, 0, 250), new Scalar(180, 16, 255), center);
Mat h = new Mat();
List<MatOfPoint> contours = new ArrayList<MatOfPoint>();
Imgproc.findContours(center, contours, h, Imgproc.RETR_LIST, Imgproc.CHAIN_APPROX_SIMPLE);
center.release();
Mat center_mask = Mat.zeros(inputFrame.rows(), inputFrame.cols(), CvType.CV_8U);
if (contours.size() > 0) {
for (int i = 0; i < contours.size(); i++) {
int radius = 10;
// Point[] cont_pos = contours.get(i).toArray();
Moments m = Imgproc.moments(contours.get(i));
Point p = new Point();
p.x = m.get_m10() / m.get_m00();
p.y = m.get_m01() / m.get_m00();
Core.circle(center_mask, p, radius * 2, new Scalar(255), -1);
}
}
// Find halo
Mat ranged = new Mat();
Core.inRange(mHsv, new Scalar(100, 32, 225), new Scalar(150, 255, 255), ranged);
mHsv.release();
// Mat f_frame =ranged.clone();
// Find halo around bright dot
Core.bitwise_and(ranged, center_mask, ranged);
center_mask.release();
// Find biggest resulting contour
for (int i = 1; i < contours.size(); i++) {
contours.get(i).release();
}
contours.clear();
Imgproc.findContours(ranged, contours, h, Imgproc.RETR_LIST, Imgproc.CHAIN_APPROX_SIMPLE);
h.release();
ranged.release();
if (contours.size() > 0) {
MatOfPoint biggest_cont = contours.get(0);
double cont_size = Imgproc.contourArea(biggest_cont);
for (int i = 1; i < contours.size(); i++) {
MatOfPoint cur = contours.get(i);
if (Imgproc.contourArea(cur) > cont_size) {
biggest_cont = cur;
cont_size = Imgproc.contourArea(cur);
}
}
Moments m = Imgproc.moments(biggest_cont);
Point p = new Point();
p.x = m.get_m10() / m.get_m00();
p.y = m.get_m01() / m.get_m00();
for (int i = 1; i < contours.size(); i++) {
contours.get(i).release();
}
biggest_cont.release();
return p;
} else {
return null;
}
}