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97 lines
3.1 KiB
97 lines
3.1 KiB
// ymageCaptcha.java
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// -----------------------
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// part of YaCy
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// (C) by Marc Nause
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//
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// $LastChangedDate: 2007-04-03 22:56:00 +0100 (Di, 04 Apr 2007) $
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// $LastChangedRevision: 3542 $
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// $LastChangedBy: low012 $
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.visualization;
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import java.util.Random;
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import javax.imageio.ImageIO;
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import net.yacy.kelondro.logging.Log;
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public class Captcha extends RasterPlotter {
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public Captcha(final int width, final int height, final DrawMode displayMode, final String code) {
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super(width, height, displayMode, "FFFFFF");
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this.create(code);
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}
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private void create(final String code){
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final Random random = new Random();
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final int width = this.getWidth();
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final int height = this.getHeight();
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final int chars = code.length();
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int x;
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int y;
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int ub = 0;
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final int widthPerChar = width/chars;
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final int pixels = width * height;
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//printing code
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for(int i=0;i<chars;i++){
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y = random.nextInt(height/2) + (height/4);
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setColor(((random.nextInt(128)+64)<<16) + ((random.nextInt(128)+64)<<8) + random.nextInt(128)+64);
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PrintTool.print(this, widthPerChar*i+random.nextInt(widthPerChar/2) , y , 0, code.substring(i,i+1), -1);
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}
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//adding some noise
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//random pixels
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ub = pixels/100;
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for(int i=0;i<ub;i++){
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setColor(((random.nextInt(128)+64)<<16) + ((random.nextInt(128)+64)<<8) + random.nextInt(128)+64);
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x = random.nextInt(width);
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y = random.nextInt(height);
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plot(x, y, 100);
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}
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//random lines
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ub = pixels/1000;
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for(int i=0;i<ub;i++){
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setColor(((random.nextInt(128)+64)<<16) + ((random.nextInt(128)+64)<<8) + random.nextInt(128)+64);
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x = random.nextInt(width);
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y = random.nextInt(height);
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line(x, y, x + random.nextInt(5), y + random.nextInt(5), 100);
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}
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}
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public static void main(final String[] args) {
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// go into headless awt mode
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System.setProperty("java.awt.headless", "true");
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final Captcha m = new Captcha(200, 70, RasterPlotter.DrawMode.MODE_REPLACE, args[1]);
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try {
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ImageIO.write(m.getImage(), "png", new java.io.File(args[0]));
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} catch (final java.io.IOException e) {
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Log.logException(e);
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}
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}
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} |