数字图像处理——图像平滑（均值滤波）

来源：互联网发布：知乎下拉刷新编辑：程序博客网时间：2024/05/12 01:26

void CWvltDoc::OnFilterSmoothmean()//均值滤波{LPBITMAPFILEHEADER lpBitmapFileHeader = (LPBITMAPFILEHEADER)m_pBitmap;LPBITMAPINFOHEADER lpBitmapInfoHeader = (LPBITMAPINFOHEADER)(m_pBitmap + 14);unsigned char *lpData = m_pBitmap + lpBitmapFileHeader->bfOffBits;unsigned long biHeight = lpBitmapInfoHeader->biHeight;unsigned long biWidth = lpBitmapInfoHeader->biWidth;  unsigned long biAlign = (biWidth * 3 + 3) / 4 * 4;unsigned long bmSize = biHeight * biAlign;if (m_pTransfered == NULL)m_pTransfered = (unsigned char*)malloc(bmSize);if (m_pTransfered == NULL)return;//Add the processing code here, which reverses the color of each pixel.int x, y, cur;for (y = 1; y < (int)biHeight-1; y++){for (x = 1; x < (int)biWidth-1; x++){cur = y*biAlign + 3 * x;int i,j,sum;int data[9];for (i = 0; i < 3; i++)//选择G、B、R分量{sum = 0;for (j = 0; j < 9; j++)//3*3模板{data[j] = lpData[(cur+i)-3*(4-j)];sum = sum + data[j];} m_pTransfered[cur+i] = (int)(sum/9);}}}UpdateAllViews(NULL);//文档被修改后可调用此函数，把文档被修改的信息通知给每个视图.}

效果图：

处理前

<img src="http://img.blog.csdn.net/20161106112612353?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

处理后

<img src="http://img.blog.csdn.net/20161106112624588?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

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