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src/application/Config.java

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+package application;
+
+public class Config {
+ public static final int IMAGE_MARGIN_TOP = 13;
+
+ /*
+ * Spacing between changed pixels is 13
+ * AND BECAUSE OF IT
+ * SPACING_CIPHER has to be equal to 14
+ *
+ * */
+ public static final int SPACING_CIPHER = 14;
+ public static final int COLOR_BOOST = 87;
+}

src/application/Decrypter.java

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+package application;
+
+import java.awt.Color;
+import java.util.*;
+import java.io.File;
+import java.io.IOException;
+import java.awt.image.BufferedImage;
+import javax.imageio.ImageIO;
+
+public class Decrypter {
+ public static String decrypt(String fileName) throws IOException {
+ BufferedImage bufferedImage = ImageIO.read(new File(fileName));
+
+ int width = bufferedImage.getWidth();
+ String text = "";
+
+ ArrayList<Character> characters = new ArrayList<Character>();
+
+ for(int pixel = 0; pixel < width; pixel++){
+ if(pixel % Config.SPACING_CIPHER == 0){
+ Color colorShade = new Color(bufferedImage.getRGB(pixel, Config.IMAGE_MARGIN_TOP), true);
+ char character = (char) colorShade.getGreen();
+ characters.add(character);
+ }
+ }
+
+ for(char character : characters)
+ text += character;
+
+ return text;
+ }
+}

src/application/Encrypter.java

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+package application;
+
+import java.awt.Color;
+import java.util.*;
+import java.io.File;
+import java.io.IOException;
+import java.awt.image.BufferedImage;
+import javax.imageio.ImageIO;
+
+public class Encrypter {
+ public static void encrypt(String fileName, String text) throws IOException {
+ int width = 0;
+ int index = 0;
+
+ File f = null;
+
+ ArrayList<Character> chars = new ArrayList<Character>();
+ ArrayList<Integer> asciiChars = new ArrayList<Integer>();
+ BufferedImage originalImage = ImageIO.read(new File(fileName));
+
+ for (char c : text.toCharArray())
+ chars.add(c);
+
+ for(char c : chars)
+ asciiChars.add(Character.getNumericValue(c));
+
+ width = originalImage.getWidth();
+
+ for(int x = 0; x < width; x++){
+ if(x % Config.SPACING_CIPHER == 0 && index < asciiChars.size()){
+ int iCharacter = asciiChars.get(index) + Config.COLOR_BOOST;
+ Color greenShade = new Color(1, iCharacter, 1);
+ originalImage.setRGB(x, Config.IMAGE_MARGIN_TOP, greenShade.getRGB());
+ index++;
+ }
+ }
+
+ try{
+ f = new File("output.png");
+ ImageIO.write(originalImage, "png", f);
+ }catch(IOException e){
+ System.out.println("Error: " + e);
+ }
+ }
+}
+

src/application/Main.java

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+package application;
+
+import java.io.IOException;
+
+import javafx.application.Application;
+import javafx.collections.ObservableList;
+import javafx.event.ActionEvent;
+import javafx.event.EventHandler;
+import javafx.geometry.Insets;
+import javafx.stage.Stage;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.Separator;
+import javafx.scene.control.TextField;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.VBox;
+
+public class Main extends Application {
+
+ TextField fileName;
+ TextField fieldTextToEncrypt;
+ VBox vbox;
+ HBox hbox;
+ Separator separator;
+ Button btnDecrypt;
+ Button btnEncrypt;
+ Label lblTextToEncrypt;
+ Label lblResult;
+
+ ObservableList hList;
+ ObservableList list;
+
+ public static void main(String[] args) {
+ launch(args);
+ }
+
+ @Override
+ public void start(Stage myStage) throws Exception {
+ myStage.setTitle("Image Cipher (alpha)");
+
+ vbox = new VBox();
+ hbox = new HBox();
+
+ lblResult = new Label("Result: ");
+ btnDecrypt = new Button("Decrypt");
+ btnEncrypt = new Button("Encrypt");
+ lblTextToEncrypt = new Label("Text: ");
+ separator = new Separator();
+ fileName = new TextField();
+ fieldTextToEncrypt = new TextField();
+
+ fileName.setPromptText("Image name to process: ");
+ fileName.setText("some_image.png");
+ fileName.setPrefColumnCount(15);
+
+ fieldTextToEncrypt.setPromptText("Text to encrypt");
+ fieldTextToEncrypt.setPrefColumnCount(40);
+
+ hbox.setSpacing(10);
+ hbox.setMargin(lblTextToEncrypt, new Insets(1, 1, 1, 20));
+ hbox.setMargin(fieldTextToEncrypt, new Insets(1, 1, 1, 1));
+
+ vbox.setSpacing(10);
+ vbox.setMargin(btnEncrypt, new Insets(0, 10, 0, 20));
+ vbox.setMargin(fileName, new Insets(20, 20, 5, 20));
+ vbox.setMargin(btnDecrypt, new Insets(5, 5, 5, 20));
+ vbox.setMargin(separator, new Insets(10, 10, 10, 10));
+ vbox.setMargin(lblResult, new Insets(10, 10, 10, 10));
+
+ separator.setPrefWidth(180);
+
+ hList = hbox.getChildren();
+ hList.addAll(lblTextToEncrypt, fieldTextToEncrypt);
+
+ list = vbox.getChildren();
+ list.addAll(fileName, btnDecrypt, separator, hbox, btnEncrypt, lblResult);
+
+ btnDecrypt.setOnAction(new EventHandler<ActionEvent>() {
+ @Override
+ public void handle(ActionEvent e){
+ try{
+ lblResult.setText(Decrypter.decrypt(fileName.getText()));
+ } catch (IOException error) {
+ System.out.println("Error: " + error);
+ }
+ }
+ });
+
+ btnEncrypt.setOnAction(new EventHandler<ActionEvent>() {
+ @Override
+ public void handle(ActionEvent e){
+ try{
+ Encrypter.encrypt(fileName.getText(), fieldTextToEncrypt.getText());
+ } catch (IOException error){
+ System.out.println("Error: " + error);
+ }
+ }
+ });
+
+ Scene myScene = new Scene(vbox, 600, 300);
+ myStage.setScene(myScene);
+ myStage.setMinHeight(300);
+ myStage.setMinWidth(600);
+
+ myStage.show();
+ }
+}