/// <summary>
/// Embeds a watermark to the planes with alpha blending.
/// </summary>
/// <param name="wm">The watermark to embed</param>
/// <param name="alpha">alpha. defaults to 0.9.</param>
public void AlphaBlend(AltariaImage wm, double alpha = 0.9)
{
if (wm.IsTransformed())
{
// SII=alpha*(CI) + (1.0-alpha)*(SI)
//alpha ranges from 0.0 to 1.0
Bitmap rbmp = new Bitmap(wm.r_plane);
Bitmap gbmp = new Bitmap(wm.g_plane);
Bitmap bbmp = new Bitmap(wm.b_plane);
double finalpixel = 0;
//Final pixel = alpha * (First image's source pixel) + (1.0-alpha) * (Second image's source pixel)
//embed r_plane into all sub bands
for (int i = 0; i < Width; i++)
{
for (int j = 0; j < Height; j++)
{
finalpixel = alpha * r_plane.GetPixel(i, j).R + (1.0 - alpha) * rbmp.GetPixel(i, j).R;
er_plane.SetPixel(i, j, Color.FromArgb((int)finalpixel, (int)finalpixel, (int)finalpixel));
}
}
//embed g_plane into all sub bands
for (int i = 0; i < Width; i++)
{
for (int j = 0; j < Height; j++)
{
finalpixel = alpha * g_plane.GetPixel(i, j).G + (1.0 - alpha) * gbmp.GetPixel(i, j).G;
eg_plane.SetPixel(i, j, Color.FromArgb((int)finalpixel, (int)finalpixel, (int)finalpixel));
}
}
//embed b_plane into all sub bands
for (int i = 0; i < Width; i++)
{
for (int j = 0; j < Height; j++)
{
finalpixel = alpha * b_plane.GetPixel(i, j).B + (1.0 - alpha) * bbmp.GetPixel(i, j).B;
eb_plane.SetPixel(i, j, Color.FromArgb((int)finalpixel, (int)finalpixel, (int)finalpixel));
}
}
watermarked = true;
}
}
/// <summary>
/// Embeds a watermark to the planes with alpha blending.
/// </summary>
/// <param name="wm">The watermark to embed</param>
/// <param name="alpha">alpha. defaults to 0.9.</param>
public void AlphaBlend(AltariaImage wm, double alpha = 0.9)
{
if (wm.IsTransformed())
{
// SII=alpha*(CI) + (1.0-alpha)*(SI)
//alpha ranges from 0.0 to 1.0
Bitmap rbmp = new Bitmap(wm.r_plane);
Bitmap gbmp = new Bitmap(wm.g_plane);
Bitmap bbmp = new Bitmap(wm.b_plane);
double finalpixel = 0;
//Final pixel = alpha * (First image's source pixel) + (1.0-alpha) * (Second image's source pixel)
//embed r_plane into all sub bands
for (int i = 0; i < Width; i++)
for (int j = 0; j < Height; j++)
{
finalpixel = alpha * r_plane.GetPixel(i, j).R + (1.0 - alpha) * rbmp.GetPixel(i, j).R;
er_plane.SetPixel(i, j, Color.FromArgb((int)finalpixel, (int)finalpixel, (int)finalpixel));
}
//embed g_plane into all sub bands
for (int i = 0; i < Width; i++)
for (int j = 0; j < Height; j++)
{
finalpixel = alpha * g_plane.GetPixel(i, j).G + (1.0 - alpha) * gbmp.GetPixel(i, j).G;
eg_plane.SetPixel(i, j, Color.FromArgb((int)finalpixel, (int)finalpixel, (int)finalpixel));
}
//embed b_plane into all sub bands
for (int i = 0; i < Width; i++)
for (int j = 0; j < Height; j++)
{
finalpixel = alpha * b_plane.GetPixel(i, j).B + (1.0 - alpha) * bbmp.GetPixel(i, j).B;
eb_plane.SetPixel(i, j, Color.FromArgb((int)finalpixel, (int)finalpixel, (int)finalpixel));
}
watermarked = true;
}
}
public void ProcessRequest(HttpContext context)
{
string filename = context.Request.QueryString["file"];
string wmname = context.Request.QueryString["wm"];
string mode = context.Request.QueryString["mode"];
string original = context.Request.QueryString["original"];
context.Response.ContentType = "image/bmp";
if (original != null)
{
try
{
((AltariaImage)context.Session[original]).originalbmp.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png);
}
catch (Exception)
{
((Bitmap)context.Session[original]).Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
}
else
//start embed of watermark
//--------------------------------------START------------------------------------------------------//
//step 1: Two images are taken as input
//AltariaImage wm = new AltariaImage(new Bitmap(fu.PostedFile.InputStream), fu.PostedFile.FileName);
//AltariaImage wm = new AltariaImage(fu.PostedFile.InputStream, fu.PostedFile.FileName);
//AltariaImage ci = (AltariaImage)Session[((Label)(ri.FindControl("ci"))).Text];
if (wmname != null && mode != null)
{
AltariaImage wm = (AltariaImage)context.Session[wmname];
AltariaImage ci = (AltariaImage)context.Session[filename];
if (!ci.IsTransformed())
{
ci.HaarTransform();
}
if (!wm.IsTransformed())
{
wm.HaarTransform();
}
//save the transform to session to avoid transformation again
context.Session[filename] = ci;
context.Session[wmname] = wm;
if (mode == "aball")
{
try
{
string alpha = context.Request.QueryString["alpha"];
double a = Convert.ToDouble(alpha) / 10.0;
ci.AlphaBlend(wm, a);
}
catch
{
ci.AlphaBlend(wm);
}
ci.HaarRestore();
ci.ConcatPlanes();
ci.concatbmp.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "aball_plane")
{
ci.AlphaBlend(wm, 0.7);
ci.er_plane.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "abfull")
{
try
{
string alpha = context.Request.QueryString["alpha"];
double a = Convert.ToDouble(alpha) / 10.0;
ci.AdvancedAlphaBlend(alpha: a);
}
catch (Exception)
{
ci.AdvancedAlphaBlend();
}
ci.HaarRestore();
ci.ConcatPlanes();
ci.concatbmp.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "abfull_plane")
{
ci.AdvancedAlphaBlend(0.5);
ci.er_plane.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "abfull_all")
{
try
{
string alpha = context.Request.QueryString["alpha"];
double a = Convert.ToDouble(alpha) / 10.0;
ci.AdvancedAlphaBlend(alpha: a, allplanes: true);
}
catch (Exception)
{
ci.AdvancedAlphaBlend(allplanes: true);
}
ci.HaarRestore();
ci.ConcatPlanes();
ci.concatbmp.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "abfull_all_plane")
{
ci.AdvancedAlphaBlend(alpha: 0.7, allplanes: true);
ci.er_plane.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "abfull_rand")
{
try
{
string alpha = context.Request.QueryString["alpha"];
double a = Convert.ToDouble(alpha) / 10.0;
ci.AdvancedAlphaBlend(alpha: a, random: true);
}
catch (Exception)
{
ci.AdvancedAlphaBlend(random: true);
}
ci.HaarRestore();
ci.ConcatPlanes();
ci.concatbmp.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "abfull_rand_plane")
{
ci.AdvancedAlphaBlend(alpha: 0.7, random: true);
ci.eb_plane.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "abfull_ex")
{
Bitmap ex_wm = ci.ExtractWatermark(wm);
ex_wm.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (mode == "abfull_ex_rand")
{
Bitmap ex_wm;
try
{
string alpha = context.Request.QueryString["alpha"];
double a = Convert.ToDouble(alpha) / 10.0;
ex_wm = ci.ExtractWatermark(wm, true, alpha: a);
}
catch (Exception)
{
ex_wm = ci.ExtractWatermark(wm, true);
}
ex_wm.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
}
else
{
AltariaImage ci = (AltariaImage)context.Session[filename];
ci.originalbmp.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp);
}
}