嘿嘿,就是将图片转换为HTML代码(DIV点阵),也就是将图片的每个象素点都用DIV来实现,这样一张HTML图片就出来了
为了避免IE暂停响应,转换的图片不要太大.要不然转换出来也不敢看!比如我们将验证码图片输出为HTML代码,这样要破解的话就让对方去还原这副图片吧
大家看看下面这张图(嘿嘿,不是图片来的,注意别用鼠标拖动选择,要不然我怕你的浏览器会暂停响应!)的效果:
public static void CovertImageToHtml(string imageFile, string fileName)
{
using (Bitmap image = new Bitmap(imageFile))
{
CovertImageToHtml(image, fileName);
}
}
public static void CovertImageToHtml(Bitmap image, string fileName)
{
using (StreamWriter writer = new StreamWriter(fileName, false, Encoding.Default, 1024))
{
//定义CSS样式
writer.WriteLine("<style>");
writer.WriteLine("#htmlpic{{width:{0}px;height:{1}px;}}", image.Width, image.Height);
writer.WriteLine("#htmlpic div{float:left;height:1px;overflow:hidden;}");
writer.WriteLine("</style>");
//输出图片数据
writer.WriteLine("<div id=\"htmlpic\">");
for (int h = 0; h < image.Height; h++)
{
Color preColor = image.GetPixel(0, h); //获取第一点的颜色值
int count = 1;
for (int w = 1; w < image.Width; w++)
{
Color nowColor = image.GetPixel(w, h);
if (preColor == nowColor)
{
count++;
}
else
{
writer.WriteLine("<div style=\"background: {0};width: {1}px\"></div>", ColorTranslator.ToHtml(preColor), count);
count = 1;
preColor = nowColor;
}
}
//写入最后的数据
writer.WriteLine("<div style=\"background: {0};width: {1}px\"></div>", ColorTranslator.ToHtml(preColor), count);
writer.WriteLine();
}
writer.WriteLine("</div>");
}
}
为了避免IE暂停响应,转换的图片不要太大.要不然转换出来也不敢看!比如我们将验证码图片输出为HTML代码,这样要破解的话就让对方去还原这副图片吧
大家看看下面这张图(嘿嘿,不是图片来的,注意别用鼠标拖动选择,要不然我怕你的浏览器会暂停响应!)的效果:
public static void CovertImageToHtml(string imageFile, string fileName)
{ using (Bitmap image = new Bitmap(imageFile)) { CovertImageToHtml(image, fileName); } } public static void CovertImageToHtml(Bitmap image, string fileName) { using (StreamWriter writer = new StreamWriter(fileName, false, Encoding.Default, 1024)) { //定义CSS样式 writer.WriteLine("<style>"); writer.WriteLine("#htmlpic{{width:{0}px;height:{1}px;}}", image.Width, image.Height); writer.WriteLine("#htmlpic div{float:left;height:1px;overflow:hidden;}"); writer.WriteLine("</style>"); //输出图片数据 writer.WriteLine("<div id=\"htmlpic\">"); for (int h = 0; h < image.Height; h++) { Color preColor = image.GetPixel(0, h); //获取第一点的颜色值 int count = 1; for (int w = 1; w < image.Width; w++) { Color nowColor = image.GetPixel(w, h); if (preColor == nowColor) { count++; } else { writer.WriteLine("<div style=\"background: {0};width: {1}px\"></div>", ColorTranslator.ToHtml(preColor), count); count = 1; preColor = nowColor; } } //写入最后的数据 writer.WriteLine("<div style=\"background: {0};width: {1}px\"></div>", ColorTranslator.ToHtml(preColor), count); writer.WriteLine(); } writer.WriteLine("</div>"); } }
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