均值迁移滤波
均值迁移滤波通过概率密度来估算与中心迁移的方式进行图像边缘保留滤波。在OpenCV中该类的实现依赖pyrMeanShiftFiltering 函数。下面是该函数的声明：
pyrMeanShiftFiltering(src, dst, sp, sr);
各参数解释
-
src
表示此操作的源(输入图像)的Mat对象。 -
dst
表示此操作的目标(输出图像)的Mat对象。 -
sp
图像色彩空间，即窗口大小 -
sr
图像色彩像素值范围，即像素差值范围
Java代码（JavaFX Controller层）
public class Controller{
@FXML private Text fxText;
@FXML private ImageView imageView;
@FXML public void handleButtonEvent(ActionEvent actionEvent) throws IOException {
Node source = (Node) actionEvent.getSource();
Window theStage = source.getScene().getWindow();
FileChooser fileChooser = new FileChooser();
FileChooser.ExtensionFilter extFilter = new FileChooser.ExtensionFilter("PNG files (*.png)", "*.png");
fileChooser.getExtensionFilters().add(extFilter);
fileChooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("JPG Files(*.jpg)", "*.jpg"));
File file = fileChooser.showOpenDialog(theStage);
runInSubThread(file.getPath());
}
private void runInSubThread(String filePath){
new Thread(new Runnable() {
@Override
public void run() {
try {
WritableImage writableImage = filterOfPYRMeanShift(filePath);
Platform.runLater(new Runnable() {
@Override
public void run() {
imageView.setImage(writableImage);
}
});
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
private WritableImage filterOfPYRMeanShift(String filePath) throws IOException {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
Mat src = Imgcodecs.imread(filePath);
Mat dst = new Mat();
Imgproc.pyrMeanShiftFiltering(src, dst, 10, 50);
MatOfByte matOfByte = new MatOfByte();
Imgcodecs.imencode(".jpg", dst, matOfByte);
byte[] bytes = matOfByte.toArray();
InputStream in = new ByteArrayInputStream(bytes);
BufferedImage bufImage = ImageIO.read(in);
WritableImage writableImage = SwingFXUtils.toFXImage(bufImage, null);
return writableImage;
}
}
运行图
