判断图形A是否在图形B里存在并返回所在位置的坐标代码,CSharp代码库,德仔网

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【CSharp】判断图形A是否在图形B里存在并返回所在位置的坐标
作者:zgke / 发布于2014/7/29/ 860

	///做了下测试

	 Bitmap Image1 = (Bitmap)Image.FromFile(@"c:/1.BMP");

	Bitmap Image2 = Image1.Clone(new Rectangle(20, 20, 50, 50), Image1.PixelFormat);

	Point _Point= Zgke.MyImage.Panit.MyPanit.GetImageContains(Image1, Image2,0);

	MessageBox.Show(_Point.ToString());

	///返回的坐标是20,20

	

	/// <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</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), 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);

	 }
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