private void btnRecognize_Click(object sender, EventArgs e)
{
var ds = new DownSample(_entryImage);
_downSampled = ds.DoDownSampling(_downSampleWidth, _downSampleHeight);
pnlSample.Invalidate();
char bestChar = '?';
double bestDistance = double.MaxValue;
foreach (char c in _letterDictionary.Keys)
{
double[] data = _letterDictionary[c];
double dist = _distCalc.Calculate(data, _downSampled);
if (dist < bestDistance)
{
bestDistance = dist;
bestChar = c;
}
}
MessageBox.Show(@"The letter closely matches: " + bestChar, @"Recognize");
ClearEntry();
}
private void ClearEntry()
{
Brush whiteBrush = new SolidBrush(Color.White);
_entryGraphics.FillRectangle(whiteBrush, 0, 0, pnlEntry.Width, pnlEntry.Height);
pnlEntry.Invalidate();
var ds = new DownSample(_entryImage);
_downSampled = ds.DoDownSampling(_downSampleWidth, _downSampleHeight);
pnlSample.Invalidate();
}
private void btnAdd_Click(object sender, EventArgs e)
{
var ds = new DownSample(_entryImage);
_downSampled = ds.DoDownSampling(_downSampleWidth, _downSampleHeight);
pnlSample.Invalidate();
const string prompt = "The letter you drew was:";
const string title = "Input Letter";
const string defaultMessage = "";
Int32 xPos = (SystemInformation.WorkingArea.Width / 2) - 200;
Int32 yPos = (SystemInformation.WorkingArea.Height / 2) - 100;
bool valid = false;
foreach (double t in _downSampled)
{
if (t > 0.1)
{
valid = true;
}
}
if (!valid)
{
MessageBox.Show(@"Please draw a letter before adding it.");
return;
}
string result = Interaction.InputBox(prompt, title, defaultMessage, xPos, yPos);
if (result != null)
{
result = result.ToUpper();
if (result.Length == 0)
{
MessageBox.Show(@"Please enter a letter.");
}
else if (result.Length > 1)
{
MessageBox.Show(@"Please only enter one letter.");
}
else if (_letterDictionary.ContainsKey(result[0]))
{
MessageBox.Show(@"That letter is already defined. Please delete it first.");
}
else
{
lstLetters.Items.Add(result);
_letterDictionary.Add(result[0], _downSampled);
ClearEntry();
}
}
}
