Java Program to Create Channel Selection System Assignment Solution

Instructions

Objective

Write a program to create channel selection system in java.

Requirements and Specifications

Source Code

import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import javax.swing.JFileChooser; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.fxml.FXML; import javafx.fxml.FXMLLoader; import javafx.scene.Parent; import javafx.scene.Scene; import javafx.scene.control.MenuItem; import javafx.scene.control.TextField; import javafx.scene.image.ImageView; import javafx.scene.image.PixelWriter; import javafx.scene.image.WritableImage; import javafx.stage.Stage; import java.awt.image.BufferedImage; import java.awt.Color; public class ChannelSelection extends Application { @FXML private TextField dimensionsTxt; @FXML private ImageView imgView; @FXML private MenuItem openMenuBttn; @FXML void initialize() { assert dimensionsTxt != null : "fx:id=\"dimensionsTxt\" was not injected: check your FXML file 'layout.fxml'."; assert imgView != null : "fx:id=\"imgView\" was not injected: check your FXML file 'layout.fxml'."; assert openMenuBttn != null : "fx:id=\"openMenuBttn\" was not injected: check your FXML file 'layout.fxml'."; } public void start(Stage primaryStage) throws IOException { FXMLLoader loader = new FXMLLoader(getClass().getResource("layout_channelselection.fxml")); Parent root = loader.load(); Scene scene = new Scene(root, 510, 420); primaryStage.setTitle("Channel Selection"); primaryStage.setScene(scene); primaryStage.show(); } public static void main(String args[]) { launch(args); } @FXML void loadImage(ActionEvent event) throws IOException { // pick image JFileChooser fileChooser = new JFileChooser(); int result = fileChooser.showOpenDialog(null); if (result == JFileChooser.APPROVE_OPTION) { File selectedFile = fileChooser.getSelectedFile(); //creating the image object //InputStream stream = new FileInputStream("garden.jpg"); BufferedImage image = ImageIO.read(new File(selectedFile.getAbsolutePath())); // Get dimensions int width = image.getWidth(); int height = image.getHeight(); WritableImage wr = new WritableImage(width, height); PixelWriter pw = wr.getPixelWriter(); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { // Get argb int pixel = image.getRGB(x,y); Color color = new Color(pixel); //int alpha = (pixel >> 24) & 0xff; /*int red = (pixel >> 16) & 0xff; int green = (pixel >> 8) & 0xff; int blue = (pixel >> 1) & 0xff;*/ int red = color.getRed(); int blue = color.getBlue(); int green = color.getGreen(); // Now, pick brightest // Check if color is almost white if(red >= 200 && green >= 200 && blue >= 200) { // nearly white red = 0; green = 0; blue = 255; } else if (blue <= 50 && red <= 50 && green <= 50) { red = 0; blue = 0; green = 0; } else if (blue >= red && blue >= green) { green = 0; red = 0; } else if (red >= blue && red >= green) { blue = 0; green = 0; } else if(green >= red && green >= blue) { red = 0; blue = 0; } // Now, convert to argb //int argb = alpha << 24 + newcol[0] << 16 + newcol[1] << 8 + newcol[2]; int argb = (255 << 24) | (red << 16) | (green << 8) | (blue << 1); pw.setArgb(x, y, argb); } } //Image image = new Image(stream); imgView.setImage(wr); //Setting the image view parameters imgView.setPreserveRatio(true); // Display dimensions dimensionsTxt.setText(String.format("Width = %d, Height = %d", width, height)); } } }