图像的灰度二值化代码.docx

/ 定义ARGB像素结构typedef union ARGB Color; struct BYTE Blue; BYTE Green; BYTE Red; BYTE Alpha; ;ARGBQuad, *PARGBQuad;/-/ 图像数据data灰度化VOID Gray(BitmapData *data) PARGBQuad p = (PARGBQuad)data-Scan0; INT offset = data-Stride - data-Width * sizeof(ARGBQuad); for (UINT y = 0; y Height; y +, (BYTE*)p += offset) for (UINT x = 0; x Width; x +, p +) p-Blue = p-Green = p-Red = (UINT)(p-Blue * 29 + p-Green * 150 + p-Red * 77 + 128) 8; /-/ 图像数据data灰度同时二值化，threshold阀值VOID GrayAnd2Values(BitmapData *data, BYTE threshold) PARGBQuad p = (PARGBQuad)data-Scan0; INT offset = data-Stride - data-Width * sizeof(ARGBQuad); for (UINT y = 0; y Height; y +, (BYTE*)p += offset) for (UINT x = 0; x Width; x +, p +) if (p-Blue * 29 + p-Green * 150 + p-Red * 77 + 128) 8) Color &= 0xff000000; else p-Color |= 0x00ffffff; /-下面是使用BCB2007和GDI+图像数据实现图像灰度和二值化的例子代码：/锁定GDI+位位图扫描线到dataFORCEINLINEVOIDLockBitmap(Gdiplus:Bitmap*bmp,BitmapData*data)Gdiplus:Rectr(0,0,bmp-GetWidth(),bmp-GetHeight();bmp-LockBits(&r,ImageLockModeRead|ImageLockModeWrite,PixelFormat32bppARGB,data);/-/GDI+位图扫描线解锁FORCEINLINEVOIDUnlockBitmap(Gdiplus:Bitmap*bmp,BitmapData*data)bmp-UnlockBits(data);/-void_fastcallTForm1:Button1Click(TObject*Sender)Gdiplus:Bitmap*bmp=newGdiplus:Bitmap(Ld:source1.jpg);Gdiplus:Graphics*g=newGdiplus:Graphics(Canvas-Handle);g-DrawImage(bmp,0,0);BitmapDatadata;LockBitmap(bmp,&data);/Gray(&data);GrayAnd2Values(&data,128);U