class FindSmallImgInBig
{ /// <summary>
/// 判断图形里是否存在另外一个图形 并返回所在位置
/// </summary>
/// <param name="p_SourceBitmap">原始图形</param>
/// <param name="p_PartBitmap">小图形</param>
/// <param name="p_Float">溶差0~120数值越大，容许相差越大（0为完全相同，一般50到100可以称：相似）</param>
/// <returns>坐标</returns>
public static Point GetImageContains(Bitmap p_SourceBitmap, Bitmap p_PartBitmap, int p_Float)
{
int _SourceWidth = p_SourceBitmap.Width;
int _SourceHeight = p_SourceBitmap.Height;
int _PartWidth = p_PartBitmap.Width;
int _PartHeight = p_PartBitmap.Height;
Bitmap _SourceBitmap = new Bitmap(_SourceWidth, _SourceHeight);
Graphics _Graphics = Graphics.FromImage(_SourceBitmap);
_Graphics.DrawImage(p_SourceBitmap, new Rectangle(0, 0, _SourceWidth, _SourceHeight));
_Graphics.Dispose();
BitmapData _SourceData = _SourceBitmap.LockBits(new Rectangle(0, 0, _SourceWidth, _SourceHeight), System.Drawing.Imaging.ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
byte[] _SourceByte = new byte[_SourceData.Stride * _SourceHeight];
Marshal.Copy(_SourceData.Scan0, _SourceByte, 0, _SourceByte.Length); //复制出p_SourceBitmap的相素信息
Bitmap _PartBitmap = new Bitmap(_PartWidth, _PartHeight);
_Graphics = Graphics.FromImage(_PartBitmap);
_Graphics.DrawImage(p_PartBitmap, new Rectangle(0, 0, _PartWidth, _PartHeight));
_Graphics.Dispose();
BitmapData _PartData = _PartBitmap.LockBits(new Rectangle(0, 0, _PartWidth, _PartHeight), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
byte[] _PartByte = new byte[_PartData.Stride * _PartHeight];
Marshal.Copy(_PartData.Scan0, _PartByte, 0, _PartByte.Length); //复制出p_PartBitmap的相素信息
for (int i = 0; i != _SourceHeight; i++)
{
if (_SourceHeight - i < _PartHeight) return new Point(-1, -1); //如果 剩余的高 比需要比较的高 还要小 就直接返回
int _PointX = -1; //临时存放坐标 需要包正找到的是在一个X点上
bool _SacnOver = true; //是否都比配的上
for (int z = 0; z != _PartHeight - 1; z++) //循环目标进行比较
{
int _TrueX = GetImageContains(_SourceByte, _PartByte, i * _SourceData.Stride, _SourceWidth, _PartWidth, p_Float);
if (_TrueX == -1) //如果没找到
{
_PointX = -1; //设置坐标为没找到
_SacnOver = false; //设置不进行返回
break;
}
else
{
if (z == 0) _PointX = _TrueX;
if (_PointX != _TrueX) //如果找到了 也的保证坐标和上一行的坐标一样 否则也返回
{
_PointX = -1;//设置坐标为没找到
_SacnOver = false; //设置不进行返回
break;
}
}
}
if (_SacnOver) return new Point(_PointX, i);
}
return new Point(-1, -1);
}
/// <summary>
/// 判断图形里是否存在另外一个图形 所在行的索引
/// </summary>
/// <param name="p_Source">原始图形数据</param>
/// <param name="p_Part">小图形数据</param>
/// <param name="p_SourceIndex">开始位置</param>
/// <param name="p_SourceWidth">原始图形宽</param>
/// <param name="p_PartWidth">小图宽</param>
/// <param name="p_Float">溶差</param>
/// <returns>所在行的索引 如果找不到返回-1</returns>
private static int GetImageContains(byte[] p_Source, byte[] p_Part, int p_SourceIndex, int p_SourceWidth, int p_PartWidth, int p_Float)
{
int _PartIndex = 0;
int _SourceIndex = p_SourceIndex;
for (int i = 0; i < p_SourceWidth; i++)
{
if (p_SourceWidth - i < p_PartWidth) return -1;
Color _CurrentlyColor = Color.FromArgb((int)p_Source[_SourceIndex + 3], (int)p_Source[_SourceIndex + 2], (int)p_Source[_SourceIndex + 1], (int)p_Source[_SourceIndex]);
Color _CompareColoe = Color.FromArgb((int)p_Part[3], (int)p_Part[2], (int)p_Part[1], (int)p_Part[0]);
_SourceIndex += 4;
bool _ScanColor = ScanColor(_CurrentlyColor, _CompareColoe, p_Float);
if (_ScanColor)
{
_PartIndex += 4;
int _SourceRVA = _SourceIndex;
bool _Equals = true;
for (int z = 0; z != p_PartWidth - 1; z++)
{
_CurrentlyColor = Color.FromArgb((int)p_Source[_SourceRVA + 3], (int)p_Source[_SourceRVA + 2], (int)p_Source[_SourceRVA + 1], (int)p_Source[_SourceRVA]);
_CompareColoe = Color.FromArgb((int)p_Part[_PartIndex + 3], (int)p_Part[_PartIndex + 2], (int)p_Part[_PartIndex + 1], (int)p_Part[_PartIndex]);
if (!ScanColor(_CurrentlyColor, _CompareColoe, p_Float))
{
_PartIndex = 0;
_Equals = false;
break;
}
_PartIndex += 4;
_SourceRVA += 4;
}
if (_Equals) return i;
}
else
{
_PartIndex = 0;
}
}
return -1;
}
/// <summary>
/// 检查色彩(可以根据这个更改比较方式
/// </summary>
/// <param name="p_CurrentlyColor">当前色彩</param>
/// <param name="p_CompareColor">比较色彩</param>
/// <param name="p_Float">溶差</param>
/// <returns></returns>
private static bool ScanColor(Color p_CurrentlyColor, Color p_CompareColor, int p_Float)
{
int _R = p_CurrentlyColor.R;
int _G = p_CurrentlyColor.G;
int _B = p_CurrentlyColor.B;
return (_R <= p_CompareColor.R + p_Float && _R >= p_CompareColor.R - p_Float) && (_G <= p_CompareColor.G + p_Float && _G >= p_CompareColor.G - p_Float) && (_B <= p_CompareColor.B + p_Float && _B >= p_CompareColor.B - p_Float);
}
}
