数字图像处理——图像平滑（中值滤波）

来源：互联网发布：photoshop cs6 mac版编辑：程序博客网时间：2024/05/18 04:36

void CWvltDoc::OnFilterSmoothmid() //中值滤波{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,m,n,temp;int data[9];for (i = 0; i < 3; i++){for (j = 0; j < 9; j++){data[j] = lpData[(cur + i) - 3 * (4 - j)];}//排序for (m = 0; m < 8; m++){for (n = m + 1; n < 9; n++){if (data[m]>data[n]){temp = data[m];data[m] = data[n];data[n] = temp;}}}m_pTransfered[cur + i] = data[5];}}}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/20161106112931339?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/20161106113017234?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

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