本文來自http://blog.csdn.net/hellogv/ ，引用必須注明出處！

?????? 本文把Aforge的運動識別與前面介紹的手寫識別融合在一起，實現單個手指的手勢識別。下圖演示了本文代碼運行的結果，圖片有點大，請稍候。。。

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?????? 我預先讓程序學習了B和C這兩個字母，然后通過手指的手勢識別向程序繪畫圖形，所以點擊recorgize時，就自動把圖形的特征對應的字母給識別出來了。

????? 這個例子關鍵部分在于如何靈活運用Aforge的運動識別，如何判斷是要畫圖，還是普通的移來移去呢？在這里，我判斷移動對象的大小，當突然面積增大(即兩個指套合并)則開始繪圖(手勢識別的開始)，當拆開再合并則為解除繪圖(手勢識別的結束)，說白了就是用一個當前狀態=!當前狀態去做。

????? 本文的代碼可以到這里下載：http://download.csdn.net/source/2313846

????? 下面貼出運動判斷的核心代碼：

[c-sharp] view plaincopyprint?

privatevoid videoSourcePlayer1_NewFrame( object sender, ref Bitmap image )?

{?

??? nowImg = (Bitmap)image.Clone();?

?

??? Bitmap objectImage = colorFilter.Apply( image );?

?

??? // lock image for further processing ?

??? BitmapData objectData = objectImage.LockBits( new Rectangle( 0, 0, image.Width, image.Height ),?

??????? ImageLockMode.ReadOnly, image.PixelFormat );?

?

??? // grayscaling ?

??? UnmanagedImage grayImage = grayFilter.Apply( new UnmanagedImage( objectData ) );?

?

??? // unlock image ?

??? objectImage.UnlockBits( objectData );?

?

??? // locate blobs? ?

??? blobCounter1.ProcessImage( grayImage );?

??? List<Rectangle> rects = new List<Rectangle>();?

??? rects.AddRange(blobCounter1.GetObjectsRectangles());?

?

??? if ( rects.Count >0 )?

??? {

??????? #region 去掉內部和黏在一起的對象 ?

??????? for (int i = 0; i < rects.Count - 1; i++)?

??????? {?

??????????? //true表示X軸上不能相交，false表示相交 ?

??????????? Boolean isNoTouchX = Math.Max(rects[i + 1].Right , rects[i].Right) - Math.Min(rects[i + 1].Left ,rects[i].Left) > (rects[i].Width + rects[i + 1].Width);?

??????????? //true表示Y軸上不能相交，false表示相交 ?

Boolean isNoTouchY = Math.Max(rects[i + 1].Bottom, rects[i].Bottom) - Math.Min(rects[i + 1].Top, rects[i].Top) > (rects[i].Height + rects[i + 1].Height);

??????????? if (isNoTouchX == false && isNoTouchY == false)//如果兩個對象相交 ?

??????????? {?

??????????????? Rectangle rect = new Rectangle(Math.Min(rects[i].Left, rects[i + 1].Left),?

??????????????????? Math.Min(rects[i].Top, rects[i + 1].Top),?

??????????????????? Math.Max(rects[i].Right, rects[i + 1].Right) - Math.Min(rects[i].Left, rects[i + 1].Left),?

??????????????????? Math.Max(rects[i].Bottom, rects[i + 1].Bottom) - Math.Min(rects[i].Top, rects[i + 1].Top));?

??????????????? rects.RemoveAt(i + 1);?

??????????????? rects.RemoveAt(i);?

?

??????????????? rects.Add(rect);?

??????????????? i = 0;?

??????????? }?

??????? }

??????? #endregion

??????? #region 畫出表示點 ?

??????? Rectangle objectRect = rects[0];?

?

??????? int oldSize=oldRect.Width+oldRect.Height;?

??????? int nowSize=rects[0].Width+rects[0].Height;?

?

??????? if (nowSize > (oldSize * 1.2))//如果突然變大，即兩個指套合并 ?

??????? {?

??????????? isCapture =!isCapture;?

??????????? clsHandWrite.Clear();?

??????? }?

?

??????? Graphics g = Graphics.FromImage(image);?

?

??????? if (isCapture)//如果捕捉到對象 ?

??????? {?

??????????? Pen pen = new Pen(Color.FromArgb(255, 0, 0), 3);?

??????????? g.DrawRectangle(pen, objectRect);?

??????????? int x = (objectRect.Left + objectRect.Width / 2) * pbDraw.Width / videoSourcePlayer1.Width;?

??????????? int y = (objectRect.Top + objectRect.Height / 2) * pbDraw.Height / videoSourcePlayer1.Height;?

??????????????????? clsHandWrite.Draw(x,y );?

??????? }?

??????? else//如果沒有捕捉到對象 ?

??????? {?

??????????? Pen pen = new Pen(Color.FromArgb(160, 255, 160), 3);?

??????????? g.DrawRectangle(pen, objectRect);?

??????? }?

?

??????? g.Dispose();

???

??????? #endregion ?

?

??????? oldRect = rects[0];?

?????????

??? }?

?

??? UpdateObjectPicture(objectImage );?

?????

}?

轉載于:https://www.cnblogs.com/tiandile/archive/2013/03/12/2956375.html

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