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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);

}

}