/// <summary>
/// 匹配度
/// </summary>
/// <param name="charInfo">需要识别的字符信息。</param>
/// <param name="library">字库设置</param>
/// <returns>返回匹配度。</returns>
public float Match(CharInfo charInfo, CharLibrary library)
{
float?item = LinqHelper.FirstOrDefault(LinqHelper.OrderByDescending(LinqHelper.Select(library.Chars, p => (float?)CharInfoCompare_3x3(charInfo, p)), p => p));
if (item == null)
{
return(0F);
}
return(item.Value);
}
/// <summary>
/// 识别字符
/// </summary>
/// <param name="charInfo">需要识别的字符信息。</param>
/// <param name="library">字库设置</param>
/// <returns>返回识别出来的字符，为null时表示未识别；根据相似度，在字库完善前会识别成相似的字符。</returns>
public char?Execute(CharInfo charInfo, CharLibrary library)
{
CharInfo item = LinqHelper.FirstOrDefault(LinqHelper.OrderByDescending(library.Chars, p => CharInfoCompare_3x3(charInfo, p)));
if (item == null)
{
return(null);
}
return(item.Value);
//float lastN = 0F;
//CharInfo item = null;
//foreach (CharInfo p in library.Chars) {
// float n = CharInfoCompare_3x3(charInfo, p);
// if (n == 0.5F) {//完全匹配了
// return p.Value;
// }
// if (n > lastN) {
// lastN = n;
// item = p;
// }
//}
//if (item == null)
// return null;
//return item.Value;
//System.Collections.Generic.List<CharInfoOrder> xs = new System.Collections.Generic.List<CharInfoOrder>();
//foreach (CharInfo p in library.Chars) {
// float n = CharInfoCompare_3x3(charInfo, p);
// if (n ==0.5F) {//完全匹配了
// return p.Value;
// }
// xs.Add(new CharInfoOrder() { n = n, p = p });
//}
//if (xs.Count == 0)
// return null;
//xs.Sort((x, y) => y.n.CompareTo(x.n));
//return xs[0].p.Value;
}
/// <summary>
/// 执行处理
/// </summary>
/// <param name="image">需要处理的图像。</param>
/// <param name="library">字库设置</param>
/// <returns>返回提取的字符列表，若字库中有数据，会有识别结果。</returns>
public unsafe System.Collections.Generic.List <CharInfo> Execute(System.Drawing.Bitmap image, CharLibrary library)
{
int width = image.Width;
int height = image.Height;
byte emptyColorR = library.EmptyColorR;
int charMaxWidth = library.CharMaxWidth;
int charWidth = library.CharWidth;
int charHeight = library.CharHeight;
bool needCenterMiddle = library.NeedCenterMiddle;
float zool = library.Zool;
if (zool != 1.0F && zool > 0F)
{
charWidth = (int)(charWidth * zool);
charHeight = (int)(charHeight * zool);
charMaxWidth = (int)(charMaxWidth * zool);
}
System.Collections.Generic.List <CharInfo> result = new System.Collections.Generic.List <CharInfo>();
CharInfo currentChar = null;
//对图像进行加锁
System.Drawing.Imaging.BitmapData originalData = null;
try {
originalData = image.LockBits(new System.Drawing.Rectangle(0, 0, width, height), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
byte *originalDataScanX = (byte *)originalData.Scan0; //这行代码需要unsafe
byte *originalDataScan0 = originalDataScanX; //这行代码需要unsafe
int offset = originalData.Stride - width * 3;
int currentCharWidth = 0;
//横向扫描
for (int x = 0; x < width; x++)
{
bool spaceY = true;
//纵向扫描
for (int y = 0; y < height; y++)
{
originalDataScan0 = originalDataScanX + x * 3 + y * width * 3 + y * offset;
if (originalDataScan0[0] == emptyColorR)
{
continue;
}
spaceY = false;
CharPoint charPoint = new CharPoint()
{
OriginalX = x,
OriginalY = y,
R = originalDataScan0[0],
G = originalDataScan0[1],
B = originalDataScan0[2],
};
if (currentChar == null)
{
currentChar = new CharInfo();
result.Add(currentChar);
}
currentChar.Points.Add(charPoint);
}
if (!spaceY)
{
currentCharWidth++;
if (currentCharWidth == charMaxWidth)
{
spaceY = true;//超出了，就结束吧
}
}
if (spaceY && currentChar != null)
{
if (currentChar.Points.Count < 8)
{
result.Remove(currentChar);
}
else
{
currentChar.Points.YZeroOffset();
currentChar.Points.XZeroOffset();
currentChar.TiltCorrect();
if (needCenterMiddle)
{
currentChar.CenterMiddle(charWidth, charHeight);
}
//char? c = library.CharRecognition(currentChar);
}
currentChar = null;
currentCharWidth = 0;
}
}
} finally {
if (originalData != null)
{
image.UnlockBits(originalData);
}
//image.Dispose();
//image = null;
}
return(result);
}