如题，我想在图片上隐藏一些代码，如果图片被操作了，就自动运行这些代码，请教达人能不能实现这样的功能
首先声明一下，我不是想隐藏病毒，现在学信息隐藏技术。在图片里隐藏了机密信息后，如果有这样一段代码实现自动计时（时间根据隐藏信息的容量来设置，以便合法提出时能够正常提出出这些信息），只要有人操作此图片，代码就运行开始计时，在指定的时间内就自动删除此图片，这样的话如果非法想提取隐藏的机密信息，那只能在指定的时间内必须完成，否则图片自动删除。在对不知道用何种隐藏算法或加密算法的攻击者来说，在设置的时间内是肯定不能破译的。这样的话我认为可以很好的防止攻击。而不用去考虑这样或那样的复杂的算法来隐藏信息了。
问题就是能不能实现这样的功能啊？？？？？？？？？？？？？？
首先声明一下，我不是想隐藏病毒，现在学信息隐藏技术。在图片里隐藏了机密信息后，如果有这样一段代码实现自动计时（时间根据隐藏信息的容量来设置，以便合法提出时能够正常提出出这些信息），只要有人操作此图片，代码就运行开始计时，在指定的时间内就自动删除此图片，这样的话如果非法想提取隐藏的机密信息，那只能在指定的时间内必须完成，否则图片自动删除。在对不知道用何种隐藏算法或加密算法的攻击者来说，在设置的时间内是肯定不能破译的。这样的话我认为可以很好的防止攻击。而不用去考虑这样或那样的复杂的算法来隐藏信息了。
问题就是能不能实现这样的功能啊？？？？？？？？？？？？？？
功能很强大，编写也很好，可以添加图片水印和文字水印两种添加出来的效果非常好，现在就把代码贴出来，供大家欣赏
要导入的空间：
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
添加图片水印的方法：
/// <summary>
/// 加图片水印
/// </summary>
/// <param name="filename">文件名</param>
/// <param name="waterFilename">水印文件名</param>
/// <param name="waterStatus">图片水印位置 0=不使用 1=左上 2=中上 3=右上 4=左中 9=右下</param>
/// <param name="quality">附加图片质量，1是 0不是</param>
/// <param name="waterTransparency">水印的透明度 1--10 10为不透明</param>
public static void AddImageSignPic(Image img, string filename, string waterFilename, int waterStatus, int quality, int waterTransparency)
{
Graphics g = Graphics.FromImage(img);
//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Image water = new Bitmap(waterFilename); if (water.Height >= img.Height || water.Width >= img.Width)
{
return;
} ImageAttributes imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap(); colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap }; imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap); float transparency = 0.5F;
if (waterTransparency >= 1 && waterTransparency <= 10)
{
transparency = (waterTransparency / 10.0F);
} float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, transparency, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
}; ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements); imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); int xpos = 0;
int ypos = 0; switch (waterStatus)
{
case 1:
xpos = (int)(img.Width * (float).01);
ypos = (int)(img.Height * (float).01);
break;
case 2:
xpos = (int)((img.Width * (float).50) - (water.Width / 2));
ypos = (int)(img.Height * (float).01);
break;
case 3:
xpos = (int)((img.Width * (float).99) - (water.Width));
ypos = (int)(img.Height * (float).01);
break;
case 4:
xpos = (int)(img.Width * (float).01);
ypos = (int)((img.Height * (float).50) - (water.Height / 2));
break;
case 5:
xpos = (int)((img.Width * (float).50) - (water.Width / 2));
ypos = (int)((img.Height * (float).50) - (water.Height / 2));
break;
case 6:
xpos = (int)((img.Width * (float).99) - (water.Width));
ypos = (int)((img.Height * (float).50) - (water.Height / 2));
break;
case 7:
xpos = (int)(img.Width * (float).01);
ypos = (int)((img.Height * (float).99) - water.Height);
break;
case 8:
xpos = (int)((img.Width * (float).50) - (water.Width / 2));
ypos = (int)((img.Height * (float).99) - water.Height);
break;
case 9:
xpos = (int)((img.Width * (float).99) - (water.Width));
ypos = (int)((img.Height * (float).99) - water.Height);
break;
} g.DrawImage(water, new Rectangle(xpos, ypos, water.Width, water.Height), 0, 0, water.Width, water.Height, GraphicsUnit.Pixel, imageAttributes);
//g.DrawImage(water, new System.Drawing.Rectangle(xpos, ypos, water.Width, water.Height), 0, 0, water.Width, water.Height, System.Drawing.GraphicsUnit.Pixel); ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo codec in codecs)
{
if (codec.MimeType.IndexOf("jpeg") > -1)
{
ici = codec;
}
}
EncoderParameters encoderParams = new EncoderParameters();
long[] qualityParam = new long[1];
if (quality < 0 || quality > 100)
{
quality = 80;
}
qualityParam[0] = quality; EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam; if (ici != null)
{
img.Save(filename, ici, encoderParams);
}
else
{
img.Save(filename);
} g.Dispose();
img.Dispose();
water.Dispose();
imageAttributes.Dispose();
}
下面这个是添加文字水印的方法
/// <summary>
/// 增加图片文字水印
/// </summary>
/// <param name="filename">文件名</param>
/// <param name="waterText">水印文字</param>
/// <param name="waterStatus">图片水印位置</param>
public static void AddImageSignText(Image img, string filename, string waterText, int waterStatus, int quality, string fontname, int fontsize)
{
//System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(img);
// .FromFile(filename);
Graphics g = Graphics.FromImage(img);
Font drawFont = new Font(fontname, fontsize, FontStyle.Regular, GraphicsUnit.Pixel);
SizeF crSize;
crSize = g.MeasureString(waterText, drawFont); float xpos = 0;
float ypos = 0; switch (waterStatus)
{
case 1:
xpos = (float)img.Width * (float).01;
ypos = (float)img.Height * (float).01;
break;
case 2:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = (float)img.Height * (float).01;
break;
case 3:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = (float)img.Height * (float).01;
break;
case 4:
xpos = (float)img.Width * (float).01;
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 5:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 6:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 7:
xpos = (float)img.Width * (float).01;
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
case 8:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
case 9:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
} // System.Drawing.StringFormat StrFormat = new System.Drawing.StringFormat();
// StrFormat.Alignment = System.Drawing.StringAlignment.Center;
//
// g.DrawString(waterText, drawFont, new System.Drawing.SolidBrush(System.Drawing.Color.White), xpos + 1, ypos + 1, StrFormat);
// g.DrawString(waterText, drawFont, new System.Drawing.SolidBrush(System.Drawing.Color.Black), xpos, ypos, StrFormat);
g.DrawString(waterText, drawFont, new SolidBrush(Color.White), xpos + 1, ypos + 1);
g.DrawString(waterText, drawFont, new SolidBrush(Color.Black), xpos, ypos); ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo codec in codecs)
{
if (codec.MimeType.IndexOf("jpeg") > -1)
{
ici = codec;
}
}
EncoderParameters encoderParams = new EncoderParameters();
long[] qualityParam = new long[1];
if (quality < 0 || quality > 100)
{
quality = 80;
}
qualityParam[0] = quality; EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam; if (ici != null)
{
img.Save(filename, ici, encoderParams);
}
else
{
img.Save(filename);
}
g.Dispose();
//bmp.Dispose();
img.Dispose();
}
这个是我测试用的代码
Image img = Image.FromStream(this.FileUpload1.PostedFile.InputStream);
string filename = Server.MapPath("img/test1.jpg");
string watername = Server.MapPath("img/11.jpg");
WaterMark.AddImageSignPic(img, filename, watername, 1, 100, 6);[/CODE]