private static System.Drawing.Bitmap ProcessImage(System.Drawing.Bitmap image)
{
System.Drawing.Bitmap bitmap = null;
try
{
bitmap = image.Clone(new System.Drawing.Rectangle(0, 0, image.Width, image.Height), image.PixelFormat);
CaptchaInfo captchaInfo = new CaptchaInfo();
bitmap = bitmap.AdjustCurves(127).RemoveNoise(new string[]
{
"ff000000"
}).GetCaptchaInfo(ref captchaInfo);
System.Drawing.Color c = System.Drawing.ColorTranslator.FromHtml("#" + captchaInfo.CaptchaColor);
float num = c.BrightnessLevel();
byte threshold = (byte)(80f * num + 50f);
if (c.B >= 250 && c.R == 0 && c.G == 0)
{
threshold = 144;
}
else if (c.B >= 250 && (c.R == 0 || c.G == 0))
{
threshold = 135;
}
else if (c.R == 255 && c.G == 255)
{
threshold = 142;
}
bitmap = image.AdjustCurves(threshold)
.RemoveNoise(new string[] { "ff000000" })
.CleanUnecessaryPixel(captchaInfo).GetLongColoredText();
//bitmap.Save("Test.jpg");
}
catch (System.Exception ex)
{
System.Console.WriteLine(ex.Message);
}
return(bitmap);
}
