如何判断黑白图片的某点是黑色还是白色

Question

如何判断黑白图片的某点是黑色还是白色

Answer 1

if Image.Canvas.Pixels[I,II]= clWhite then这是把图片导入到TImage中

Answer 2

GetRValue(Image1.Canvas.Pixels[x,y])= 0)and(GetGValue(Image1.Canvas.Pixels[x,y])= 0) and (GetBValue(Image1.Canvas.Pixels[x,y])= 0 么?

Answer 3

      Tc:= Image1.Canvas.Pixels[i,j];
      CRed:= GetRvalue(Tc);
      CGreen:= GetGvalue(Tc);
      CBlue:= GetBvalue(Tc);
      if (CRed=0)and(CGreen=0)and(CBlue=0) then
      begin
        // 黑色
      end;