圖像處理：Robert邊緣檢測算子

圖像處理：Robert邊緣檢測算?事情?較多?較雜，早點把學校的事弄完吧，好久沒寫博客了，最近計算機前沿這門課，?師要布置課題，?部分是VerilogHDL程序設計，腦殼疼，硬件太煩，不過還好，可以選擇其他?向的哈哈，api學習還是有必要的，不必造輪?，不過，要有造輪?的能?，具體分的課題是邊緣檢測算法的Robert算?書上只是給個函數，可以理解為偽代碼，具體實現，還是要??去動?的，書上只是給個思路?已：核?就是對像素的處理，獲取位圖像素位，處理像素位，設置像素位，就這么?部，當初想，多么簡單啊，其實還是不能?意，遇到?些問題，然后慢慢克服，最終解決難題，只有這樣，才能不斷成長，絕對不能眼??低主要遇到的問題，就是獲得位圖的像素位?開始，我以為BITMAP結構的bmBits就是存放像素位的，結果運?有問題還以為是我??沒有新加載?個位圖，在新位圖?存放新像素位，結果還是不?，調試時發(fā)現BITMAP的bmBits始終為0所以問題出在這，我們并沒有真正獲取到位圖的像素位，要獲取位圖的像素位，可以?GetBitmapBits函數，函數怎么?去查msdn或者百度相應的設置像素位?SetBitmapBits，下?就是Robert算?具體實現的核?代碼了最后實現效果:好了，?功告成，?定要注意，獲取設置位圖像素位，?BITMAP的bmBits成員是不?的，?GetBitmapBits和SetBitmapBits即可最后附上完整win32API代碼：//VC++圖像處理程序//圖像的邊緣檢測-Robert算?//圖像的邊緣檢測-Robert算?#include<windows.h>#include<cmath>LRESULTCALLBACKWndProc(HWND,UINT,WPARAM,LPARAM);//窗?過程函數voidRobertOperator(HDChdc,HDChMemDc,HBITMAPhBitmap,intWidth,intHeight);intWINAPIWinMain(HINSTANCEhInstance,HINSTANCEhPrevInstance,PSTRszCmdLine,intiCmdShow){TCHARszAppName[]=TEXT("Robert算?");//設計窗?類WNDCLASSwndclass;//窗?類wndclass.cbClsExtra=0;wndclass.cbWndExtra=0;wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);//窗?背景畫刷(??)wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);wndclass.hInstance=NULL;wndclass.lpfnWndProc=WndProc;wndclass.lpszClassName=szAppName;//類名wndclass.lpszMenuName=NULL;wndclass.style=CS_HREDRAW|CS_VREDRAW;//注冊窗?類if(!RegisterClass(&wndclass)){MessageBox(NULL,TEXT("ProgramrequireswindowsNT!"),szAppName,MB_ICONERROR);return0;}//創(chuàng)建窗?HWNDhwnd=CreateWindow(szAppName,TEXT("Robert算?"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,540,630,NULL,NULL,hInstance,NULL);ShowWindow(hwnd,SW_SHOW);UpdateWindow(hwnd);MSGmsg;//消息循環(huán)while(GetMessage(&msg,NULL,0,0)){TranslateMessage(&msg);DispatchMessage(&msg);}return0;}LRESULTCALLBACKWndProc(HWNDhwnd,UINTuMsg,WPARAMwParam,LPARAMlParam){staticHDChMemDc;staticintxWidth,yHeight;staticBITMAPbm;staticBITMAPbm;staticHBITMAPhBitmap;switch(uMsg){caseWM_CREATE:{//原位圖hBitmap=(HBITMAP)LoadImage(NULL,TEXT("Picture2.bmp"),IMAGE_BITMAP,0,0,LR_LOADFROMFILE);if(hBitmap==NULL){MessageBox(NULL,TEXT("讀取圖?失敗"),TEXT("Error"),MB_ICONERROR);return0;}//將原位圖選進內存DCHDChdc=GetDC(hwnd);hMemDc=CreateCompatibleDC(hdc);//內存DCSelectObject(hMemDc,hBitmap);ReleaseDC(hwnd,hdc);//計算位圖的寬和?GetObject(hBitmap,sizeof(bm),&bm);xWidth=bm.bmWidth;yHeight=bm.bmHeight;return0;}caseWM_PAINT:{HDChdc;PAINTSTRUCTps;hdc=BeginPaint(hwnd,&ps);BitBlt(hdc,0,0,xWidth,yHeight,hMemDc,0,0,SRCCOPY);//BitBlt(hdc,0,300,xTempWidth,yTempHeight,hTempMemDc,0,0,SRCCOPY);RobertOperator(hdc,hMemDc,hBitmap,xWidth,yHeight);//BitBlt(hdc,590,0,xWidth,yHeight,hMemDc,0,0,SRCCOPY);EndPaint(hwnd,&ps);return0;}caseWM_CLOSE:DeleteDC(hMemDc);PostQuitMessage(0);//DestroyWindow(hwnd);return0;}returnDefWindowProc(hwnd,uMsg,wParam,lParam);}voidRobertOperator(HDChdc,HDChMemDc,HBITMAPhBitmap,intWidth,intHeight){intRobert_Pixel[4];//Robert算?BYTE*pTempPixel=newBYTE[16*Width*Height];//得到位圖的像素位GetBitmapBits(hBitmap,16*Width*Height,(LPVOID)pTempPixel);BYTE*pPixel=newBYTE[16*Width*Height];for(intj=0;j<4*Height-1;j++)for(inti=0;i<4*Width-1;i++){//?成Robert算?//?成Robert算?Robert_Pixel[0]=pTempPixel[j*4*Width+i];Robert_Pixel[1]=pTempPixel[j*4*Width+i+1];Robert_Pixel[2]=pTempPixel[(j+1)*4*Width+i];Robert_Pixel[3]=pTempPixel[(j+1)*4*Width+i+1];//?成當前像素pPixel[j*4*Width+i]=(int)sqrt((Robert_Pixel[0]-Robert_Pixel[3])*(Robert_Pixel[0]-Robert_Pixel[3])+(Robert_Pixel[1]-Robert_Pixel[2])*(Robert_Pixel[1]-Robert_Pixel[2]));//pPixel[j*Width+i]