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import org.opencv.core.*;
import org.opencv.highgui.HighGui;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
class SmoothingRun {
/// Global Variables
int DELAY_CAPTION = 1500;
int DELAY_BLUR = 100;
int MAX_KERNEL_LENGTH = 31;
Mat src = new Mat(), dst = new Mat();
String windowName = "Filter Demo 1";
public void run(String[] args) {
String filename = ((args.length > 0) ? args[0] : "../data/lena.jpg");
src = Imgcodecs.imread(filename, Imgcodecs.IMREAD_COLOR);
if( src.empty() ) {
System.out.println("Error opening image");
System.out.println("Usage: ./Smoothing [image_name -- default ../data/lena.jpg] \n");
System.exit(-1);
}
if( displayCaption( "Original Image" ) != 0 ) { System.exit(0); }
dst = src.clone();
if( displayDst( DELAY_CAPTION ) != 0 ) { System.exit(0); }
/// Applying Homogeneous blur
if( displayCaption( "Homogeneous Blur" ) != 0 ) { System.exit(0); }
//! [blur]
for (int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2) {
Imgproc.blur(src, dst, new Size(i, i), new Point(-1, -1));
displayDst(DELAY_BLUR);
}
//! [blur]
/// Applying Gaussian blur
if( displayCaption( "Gaussian Blur" ) != 0 ) { System.exit(0); }
//! [gaussianblur]
for (int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2) {
Imgproc.GaussianBlur(src, dst, new Size(i, i), 0, 0);
displayDst(DELAY_BLUR);
}
//! [gaussianblur]
/// Applying Median blur
if( displayCaption( "Median Blur" ) != 0 ) { System.exit(0); }
//! [medianblur]
for (int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2) {
Imgproc.medianBlur(src, dst, i);
displayDst(DELAY_BLUR);
}
//! [medianblur]
/// Applying Bilateral Filter
if( displayCaption( "Bilateral Blur" ) != 0 ) { System.exit(0); }
//![bilateralfilter]
for (int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2) {
Imgproc.bilateralFilter(src, dst, i, i * 2, i / 2);
displayDst(DELAY_BLUR);
}
//![bilateralfilter]
/// Done
displayCaption( "Done!" );
System.exit(0);
}
int displayCaption(String caption) {
dst = Mat.zeros(src.size(), src.type());
Imgproc.putText(dst, caption,
new Point(src.cols() / 4, src.rows() / 2),
Imgproc.FONT_HERSHEY_COMPLEX, 1, new Scalar(255, 255, 255));
return displayDst(DELAY_CAPTION);
}
int displayDst(int delay) {
HighGui.imshow( windowName, dst );
int c = HighGui.waitKey( delay );
if (c >= 0) { return -1; }
return 0;
}
}
public class Smoothing {
public static void main(String[] args) {
// Load the native library.
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
new SmoothingRun().run(args);
}
}
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