/// <summary>
/// Вычисление минимальной площади прямоугольника, обрамляющего два области
/// </summary>
/// <param name="firstRegion">Первая область</param>
/// <param name="secondRegion">Вторая область</param>
/// <returns></returns>
private int CalculateAllTextBoxSquare(TextRegion firstRegion, TextRegion secondRegion)
{
try
{
int minAllBBI = Math.Min(firstRegion.MinBorderIndexI, secondRegion.MinBorderIndexI);
int minAllBBJ = Math.Min(firstRegion.MinBorderIndexJ, secondRegion.MinBorderIndexJ);
int maxAllBBI = Math.Max(firstRegion.MaxBorderIndexI, secondRegion.MaxBorderIndexI);
int maxAllBBJ = Math.Max(firstRegion.MaxBorderIndexJ, secondRegion.MaxBorderIndexJ);
return (maxAllBBI - minAllBBI + 1) * (maxAllBBJ - minAllBBJ + 1);
}
catch (Exception excption)
{
throw excption;
}
}
/// <summary>
/// Принадлежит ли точка с заданными координатами области
/// </summary>
/// <param name="textRegion">Область</param>
/// <param name="pointIndexI">Координата по строке</param>
/// <param name="pointIndexJ">Координата по столбцу</param>
/// <returns>1 - принадлежит, 0 - иначе</returns>
private bool IsBelongToRegion(TextRegion textRegion, int pointIndexI, int pointIndexJ)
{
try
{
bool result = false;
if (pointIndexI >= textRegion.MinBorderIndexI && pointIndexJ >= textRegion.MinBorderIndexJ &&
pointIndexJ <= textRegion.MaxBorderIndexJ && pointIndexI <= textRegion.MaxBorderIndexI)
result = true;
return result;
}
catch (Exception exception)
{
throw exception;
}
}
/// <summary>
/// Вычисление площади пересечения двух текстовых областей
/// </summary>
/// <param name="firstRegion">Первая область</param>
/// <param name="secondRegion">Вторая область</param>
/// <returns></returns>
private int CalculateIntersectionSquare(TextRegion firstRegion, TextRegion secondRegion)
{
try
{
int minAllBBI = Math.Min(firstRegion.MinBorderIndexI, secondRegion.MinBorderIndexI);
int minAllBBJ = Math.Min(firstRegion.MinBorderIndexJ, secondRegion.MinBorderIndexJ);
int maxAllBBI = Math.Max(firstRegion.MaxBorderIndexI, secondRegion.MaxBorderIndexI);
int maxAllBBJ = Math.Max(firstRegion.MaxBorderIndexJ, secondRegion.MaxBorderIndexJ);
int square = 0;
for (int i = minAllBBI; i <= maxAllBBI; i++)
for (int j = minAllBBJ; j <= maxAllBBJ; j++)
if (IsBelongToRegion(firstRegion, i, j) && IsBelongToRegion(secondRegion, i, j))
++square;
return square;
}
catch (Exception exception)
{
throw exception;
}
}
/// <summary>
/// Вычисление вероятности совпадения двух текстовых областей
/// </summary>
/// <param name="firstRegion">Первая текстовая область</param>
/// <param name="secondRegion">Вторая текстовая область</param>
/// <returns></returns>
private double CalculateMatch(TextRegion firstRegion, TextRegion secondRegion)
{
try
{
int allBBSquare = CalculateAllTextBoxSquare(firstRegion, secondRegion);
int intersectionSquare = CalculateIntersectionSquare(firstRegion, secondRegion);
return (double) intersectionSquare / (double) allBBSquare;
}
catch (Exception exception)
{
throw exception;
}
}
/// <summary>
/// Считывание текстовых областей для одного кадра
/// </summary>
/// <param name="xmlReader">xml - reader</param>
/// <param name="textRegions">Текстовые области</param>
/// <param name="frameNumber">Номер кадра</param>
private static void ReadFrameTextBlocksInformation(System.Xml.XmlReader xmlReader, out List<TextRegion> textRegions,
out int frameNumber)
{
try
{
textRegions = new List<TextRegion>();
xmlReader.MoveToFirstAttribute();
frameNumber = Convert.ToInt32(xmlReader.Value);
xmlReader.MoveToNextAttribute();
int textRegionsNumber = Convert.ToInt32(xmlReader.Value);
if (textRegionsNumber != 0)
{
bool readingFrame = true;
while (xmlReader.Read() && readingFrame)
{
if (xmlReader.Name == "Frame")
readingFrame = false;
else if (xmlReader.Name == "TextRegion")
{
TextRegion textRegion = new TextRegion();
while (xmlReader.MoveToNextAttribute())
{
switch (xmlReader.Name)
{
case "LeftUpPointIndexI":
textRegion.MinBorderIndexI = Convert.ToInt32(xmlReader.Value);
break;
case "LeftUpPointIndexJ":
textRegion.MinBorderIndexJ = Convert.ToInt32(xmlReader.Value);
break;
case "RightDownPointIndexI":
textRegion.MaxBorderIndexI = Convert.ToInt32(xmlReader.Value);
break;
case "RightDownPointIndexJ":
textRegion.MaxBorderIndexJ = Convert.ToInt32(xmlReader.Value);
break;
default:
break;
}
}
textRegions.Add(textRegion);
}
}
}
}
catch (Exception exception)
{
throw exception;
}
}