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package opencvtutorial;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.Point;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.highgui.HighGui;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import org.scijava.nativelib.NativeLoader;
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: ./opencvtutorial.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 {
static {
try {
// Load the native OpenCV library
NativeLoader.loadLibrary(Core.NATIVE_LIBRARY_NAME);
} catch (Exception e) {
}
}
public static void main(String[] args) {
new SmoothingRun().run(args);
}
}