private Candidate findCandidate(Image test)
{
double bestMSE = double.MaxValue;
CharPattern bestCandidate = patterns[0];
foreach(CharPattern train in patterns)
{
double mse = calcMSE(train, test);
if(mse < bestMSE)
{
bestMSE = mse;
bestCandidate = train;
}
if(mse == 0)
{
break;
}
}
return new Candidate(bestMSE, bestCandidate);
}
public static List <CharPattern> readCharsFromResources(string section)
{
// result
List <CharPattern> patterns = new List <CharPattern>();
// get a reference to the current assembly
Assembly ass = Assembly.GetExecutingAssembly();
// read from assembly
Stream stream = getAssemblyStream(ass, "mapping.config");
// config
XmlDocument doc = new XmlDocument();
doc.Load(stream);
// parse
XmlNode parent = doc.GetElementsByTagName(section).Item(0);
foreach (XmlNode node in parent.ChildNodes)
{
// attributes
XmlElement charElement = (XmlElement)node;
char name = charElement.Attributes["key"].Value[0];
string file = charElement.Attributes["image"].Value;
// read from assembly
Stream imgStream = getAssemblyStream(ass, file);
Bitmap bitmap = Bitmap.FromStream(imgStream) as Bitmap;
Image image = toImage(bitmap);
imgStream.Close();
// new pattern
CharPattern pattern = new CharPattern(name, image);
patterns.Add(pattern);
}
return(patterns);
}
private Candidate findSubCandidate(Image test, int xOffset)
{
double bestMSE = double.MaxValue;
CharPattern bestCandidate = patterns[0];
foreach(CharPattern train in patterns)
{
if(train.width > 2 &&
train.height <= test.height &&
(train.width + xOffset) <= test.width)
{
int distance = test.height - train.height;
for(int y = 0; y <= distance; y++)
{
int xStart = xOffset;
int xEnd = xStart + train.width;
int yStart = y;
int yEnd = yStart + train.height;
Image subTest = test.crop(xStart, xEnd, yStart, yEnd);
double mse = calcMSE(train, subTest);
if(mse < bestMSE)
{
bestMSE = mse;
bestCandidate = train;
}
if(bestMSE == 0)
{
return new Candidate(bestMSE, bestCandidate);
}
}
}
}
return new Candidate(bestMSE, bestCandidate);
}
public Candidate(double mse, CharPattern pattern)
{
this.mse = mse;
this.pattern = pattern;
}