灰度图像的膨胀操作（vc实现）

void CISLSView::dilationGray(int structure[3][3])
	{
		//灰度图像的膨胀操作  
		//李立宗   lilizong@gmail.com
		//2012-8-22
		if(myImage1.IsNull())
			OnOpenResourceFile();
		if(!myImage2.IsNull())
			myImage2.Destroy();
		if(myImage2.IsNull()){
			myImage2.Create(myImage1.GetWidth(),myImage1.GetHeight(),24,0);
		}
		if(myImage3.IsNull()){
			myImage3.Create(myImage1.GetWidth(),myImage1.GetHeight(),24,0);
		}
		//COLORREF pixel; 
		int maxY = myImage1.GetHeight();
		int maxX=myImage1.GetWidth();
		byte* pRealData;
		byte* pRealData2;
		byte* pRealData3;
		pRealData=(byte*)myImage1.GetBits();
		pRealData2=(byte*)myImage2.GetBits();
		pRealData3=(byte*)myImage3.GetBits();
		int pit=myImage1.GetPitch();
		int pit2=myImage2.GetPitch();
		int pit3=myImage3.GetPitch();
		//需要注意,pit和pit2的值并不一样,所以如果使用一个值,会导致不同的结果出现
		//CString str;
		//str.Format(TEXT("%d"),pit);
		//MessageBox(str);
		//str.Format(TEXT("%d"),pit2);
		//MessageBox(str);
		int bitCount=myImage1.GetBPP()/8;
		int bitCount2=myImage2.GetBPP()/8;
		int bitCount3=myImage3.GetBPP()/8;
		int tempR,tempG,tempB;
		//float temp,tempX,tempY;
		int temp;
		float u0,u1;   //均值
		float w0,w1;   //概率
		float sum0,sum1;  //像素和
		int optIndex,optT;   //最优阈值，及其所在像素的值
		float fVaria,fMaxVaria=0;   //临时方差,最大方差

		//int pixelR[256],pixelG[256],pixelB[256];
		int pixel[256]={0};   //不要忘记初始化
		//灰度化
		for (int y=0; y<maxY; y++) {
			for (int x=0; x<maxX; x++) {
				temp=*(pRealData+pit*(y)+(x)*bitCount);
				if(bitCount==3)
				{
					tempR=*(pRealData+pit*(y)+(x)*bitCount);
					tempG=*(pRealData+pit*(y)+(x)*bitCount+1);
					tempB=*(pRealData+pit*(y)+(x)*bitCount+2);
					temp=(int)(tempR*0.49+tempG*0.31+tempB*0.2);
					//temp=(int)((tempR+tempG+tempB)/3);
				}
				*(pRealData3+pit3*(y)+(x)*bitCount3)=temp;
				*(pRealData3+pit3*(y)+(x)*bitCount3+1)=temp;
				*(pRealData3+pit3*(y)+(x)*bitCount3+2)=temp;

			}
		}
		//CString str;
		//str.Format(TEXT("%d"),Td);
		//AfxMessageBox(str);
		//
		//for (int y=0; y<maxY; y++) {
		//	for (int x=0; x<maxX; x++) {

		//		*(pRealData2+pit2*(y)+(x)*bitCount2)=255;
		//		*(pRealData2+pit2*(y)+(x)*bitCount2+1)=255;
		//		*(pRealData2+pit2*(y)+(x)*bitCount2+2)=255;

		//	}
		//}
		int m,n;
		int src,des;
		
		for (int y=1; y<maxY-1; y++) {
			for (int x=1; x<maxX-1; x++) {
				src=des=0;
				for(m=0;m<3;m++)
					for(n=0;n<3;n++)
					{	
						src=*(pRealData3+pit3*(y-m+1)+(x+n-1)*bitCount3)+structure[m]
;
						//src=abs(src);
						if(src>255)
							src=255;
						if(src>des)
						{
							des=src;				
						}
					}
					//des=abs(des);
					//if(des>255)
					//	des=255;
					*(pRealData2+pit2*(y)+(x)*bitCount2)=des;
					*(pRealData2+pit2*(y)+(x)*bitCount2+1)=des;
					*(pRealData2+pit2*(y)+(x)*bitCount2+2)=des;
			}
		}
		Invalidate();
	}