캡챠 노이즈 추가

plugin/kcaptcha/kcaptcha_config.php

@@ -6,21 +6,31 @@ $alphabet = "0123456789abcdefghijklmnopqrstuvwxyz"; # do not change without chan
 
 # symbols used to draw CAPTCHA
 $allowed_symbols = "0123456789"; #digits
+//$allowed_symbols = "0123456789abcdef"; #digits // 스캔 방지를 위하여 abcdef 추가 151029 15:00
+//$allowed_symbols = "abcdeghkmnpqsuvxyz"; #digits
 //$allowed_symbols = "23456789abcdeghkmnpqsuvxyz"; #alphabet without similar symbols (o=0, 1=l, i=j, t=f)
 
 # folder with fonts
-$fontsdir = 'fonts';	
+$fontsdir = 'fonts';
 
 # CAPTCHA string length
 //$length = mt_rand(5,6); # random 5 or 6
 $length = 6;
 
 # CAPTCHA image size (you do not need to change it, whis parameters is optimal)
-$width = 120;
+$width = 160;
 $height = 60;
 
 # symbol's vertical fluctuation amplitude divided by 2
-$fluctuation_amplitude = 5;
+//$fluctuation_amplitude = 5;
+//$fluctuation_amplitude = 11; // 파동&진폭 151028 14:00
+$fluctuation_amplitude = 5; // 파동&진폭 원래대로 151029 15:00
+
+#noise
+//$white_noise_density=0; // no white noise
+$white_noise_density=1/6;
+//$black_noise_density=0; // no black noise
+$black_noise_density=1/20;
 
 # increase safety by prevention of spaces between symbols
 $no_spaces = false;