攝影機攝取的bitmap图片不能正确的二值转换，无论比较值定为多少，都不行。 原码， void __fastcall TForm1::FormCreate(TObject *Sender) {  bitmap1=new Graphics ::TBitmap;     try{         bitmap1->LoadFromFile("Bild.bmp");         bitmap1->PixelFormat=pf8bit;         }  catch(...)      {         ShowMessage("Could not load  bitmap");      }  Image1->Canvas->FillRect(Image1->Canvas->ClipRect);  Image1->Canvas->Draw(0,0,bitmap1);    }    void __fastcall TForm1::FormDestroy(TObject *Sender) { delete bitmap1;    }    void __fastcall TForm1::Button1Click(TObject *Sender) {   Image1->Canvas->FillRect(Image1->Canvas->ClipRect);       Palette(Image1);   for(int y=0;yHeight;y ) { ptr=static_cast( bitmap1->ScanLine[y]); for(int x=0;xWidth;x ) { if(ptr[x]>=220) ptr[x]=255; else ptr[x]=0; } } Image1->Picture->Bitmap->Assign(bitmap1); } void __fastcall TForm1::Palette(TImage *Pic) { LOGPALETTE* plLogPal = NULL; int ilPaletteSize = 0; // Size of the buffer for the LOGPALETTE struct Pic->Picture->Bitmap->PixelFormat = pf8bit; try { // Calculate the Memory for the Pallet and allocate memory: ilPaletteSize = sizeof(LOGPALETTE) (sizeof(PALETTEENTRY) * 255); plLogPal = (LOGPALETTE*) malloc(ilPaletteSize); if(plLogPal != NULL) { // Pallet init plLogPal->palVersion = 0x300; plLogPal->palNumEntries = 256; // Init the color in the pallet with gray value: for (int ilColorIndex = 0; ilColorIndex <= 255; ilColorIndex ) { plLogPal->palPalEntry[ilColorIndex].peRed = ilColorIndex; plLogPal->palPalEntry[ilColorIndex].peGreen = ilColorIndex; plLogPal->palPalEntry[ilColorIndex].peBlue = ilColorIndex; plLogPal->palPalEntry[ilColorIndex].peFlags = PC_NOCOLLAPSE; } // Create pallet and assign: HPALETTE hLogPal = CreatePalette(plLogPal); if (hLogPal) { Pic->Picture->Bitmap->Palette = hLogPal; } // Free the memory free(plLogPal); plLogPal = NULL; } } catch ( ... ) { } } 不知错在哪里Ä 原图；

原图； 现图；

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