CharPlot
Plotting with Chars. You can do it with 42 and with your girl friend, too.
public class CharPlotUtil {
private static int xStep = 2;
private static int yStep = 2;
public static void main(String[] args) throws IOException {
initChars(" .:0123456789oO*+-,;dc3öÖ%qQG´");
BufferedImage bufferedImage = ImageIO.read(new File("D:\\Temp\\Chars\\img.png"));
// http://www.stupidedia.org/images/8/80/The_Answer_to_Life,_the_Universe,_and_Everything.png
int normalizationFactor = 3 * xStep * yStep * 255;
for (int y = 0; y < bufferedImage.getHeight() - yStep; y += yStep) {
for (int x = 0; x < bufferedImage.getWidth() - xStep; x += xStep) {
int sum = 0;
for (int xx = x; xx < x + xStep; xx++) {
for (int yy = y; yy < y + yStep; yy++) {
int value = bufferedImage.getRGB(xx, yy);
int byte1 = value & 0xFF;
int byte2 = (value >> 8) & 0xFF;
int byte3 = (value >> 16) & 0xFF;
sum += byte1 + byte2 + byte3;
}
}
float f = ((float) sum) / normalizationFactor;
System.out.print(CharWithGrayValue.getCharByGrayValue(f).getChar());
}
System.out.println();
}
}
private static void initChars(String charsAsString) {
for (int i = 0; i < charsAsString.length(); i++) {
char c = charsAsString.charAt(i);
CharWithGrayValue.add(new CharWithGrayValue(c));
}
}
}
public class CharWithGrayValue {
private static int width = 16;
private static int height = 24;
private static int fontSize = 23;
private static Font font = new Font("Courier New", Font.PLAIN, fontSize);
private static Map<Integer, CharWithGrayValue> charsWithGrayValue = new TreeMap<>();
private static int minGrayValue = -1;
private static int maxGrayValue = 0;
private char c;
private int grayValue;
public CharWithGrayValue(char c) {
this.c = c;
grayValue = getGrayValue(c);
}
public char getChar() {
return c;
}
public int getGrayValue() {
return grayValue;
}
private static int getGrayValue(char c) {
BufferedImage charImage = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
Graphics graphics = charImage.createGraphics();
graphics.setFont(font);
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, width, height);
graphics.setColor(Color.BLACK);
graphics.drawString("" + c, 0, height - 4);
return getGrayValue(charImage);
}
private static int getGrayValue(BufferedImage charImage) {
int result = 0;
for (int i = 0; i < charImage.getHeight(); i++) {
for (int j = 0; j < charImage.getWidth(); j++) {
if (charImage.getRGB(j, i) != -1) {
result++;
}
}
}
return result;
}
public static void add(CharWithGrayValue cg) {
charsWithGrayValue.put(cg.getGrayValue(), cg);
if (cg.getGrayValue() > maxGrayValue) {
maxGrayValue = cg.getGrayValue();
}
if (cg.getGrayValue() < minGrayValue || minGrayValue == -1) {
minGrayValue = cg.getGrayValue();
}
}
public static CharWithGrayValue getCharByGrayValue(float normalizedGrayValue) {
// normalizedGrayValue: 0, ..., 1
// intGrayValue: minGrayValue, ..., maxGrayValue
int intGrayValue = (int) (minGrayValue + (maxGrayValue - minGrayValue) * normalizedGrayValue);
for (int gv : charsWithGrayValue.keySet()) {
if (gv >= intGrayValue) {
return charsWithGrayValue.get(gv);
}
}
return new CharWithGrayValue(' '); // Should not happen
}
}
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