void txt_Click(object sender, EventArgs e, PictureBox img, ComboBox drpd)
{
//Task.Run(() =>
//{
try
{
img.ImageLocation = ((sender as TextBox).Text);
img.Refresh();
Image otima = null;
if (Out.IsLocalFile(img.ImageLocation))
{
otima = Image.FromFile(img.ImageLocation);
}
else
if (Out.URLExists(img.ImageLocation))
{
using (System.Net.WebClient wc = new System.Net.WebClient())
{
otima = Image.FromStream(new MemoryStream(wc.DownloadData(img.ImageLocation)));
}
}
if (otima != null)
{
Task.Run(() =>
{
img.BackColor = PictureAnalysis.GetMostUsedColor(otima).MostUsedColor;
});
}
}
catch { }
//});
}
public static PictureAnalysis GetMostUsedColor(System.Drawing.Image img)
{
var theBitMap = new Bitmap(img);
var ret = new PictureAnalysis();
ret.TenMostUsedColors = new List <Color>();
ret.TenMostUsedColorIncidences = new List <int>();
ret.MostUsedColor = Color.Empty;
ret.MostUsedColorIncidence = 0;
// does using Dictionary<int,int> here
// really pay-off compared to using
// Dictionary<Color, int> ?
// would using a SortedDictionary be much slower, or ?
ret.dctColorIncidence = new Dictionary <int, int>();
// this is what you want to speed up with unmanaged code
for (int row = 0; row < theBitMap.Size.Width; row++)
{
for (int col = 0; col < theBitMap.Size.Height; col++)
{
ret.pixelColor = theBitMap.GetPixel(row, col).ToArgb();
if (ret.dctColorIncidence.Keys.Contains(ret.pixelColor))
{
ret.dctColorIncidence[ret.pixelColor]++;
}
else
{
ret.dctColorIncidence.Add(ret.pixelColor, 1);
}
}
}
// note that there are those who argue that a
// .NET Generic Dictionary is never guaranteed
// to be sorted by methods like this
var dctSortedByValueHighToLow = ret.dctColorIncidence.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
// this should be replaced with some elegant Linq ?
foreach (KeyValuePair <int, int> kvp in dctSortedByValueHighToLow.Take(10))
{
ret.TenMostUsedColors.Add(Color.FromArgb(kvp.Key));
ret.TenMostUsedColorIncidences.Add(kvp.Value);
}
ret.MostUsedColor = Color.FromArgb(dctSortedByValueHighToLow.First().Key);
ret.MostUsedColorIncidence = dctSortedByValueHighToLow.First().Value;
return(ret);
}