“输入的颜色数”
说的是阈值么？
//色彩调节子程序，供楼主参考
procedure TForm1.Highlight(aSource, ATarget: TBitmap; AColor: TColor);
var
i, j: Integer;
s, t: pRGBTriple;
r, g, b: byte;
cl: TColor;
begin
cl := ColorToRGB(AColor);
//获取选中颜色的R、G、B三个分量
r := GetRValue(cl);
g := GetGValue(cl);
b := GetBValue(cl);
//都指定是24位真彩色位图
aSource.PixelFormat := pf24bit;
ATarget.PixelFormat := pf24bit;
ATarget.Width := aSource.Width;
ATarget.Height := aSource.Height;
for i := 0 to aSource.Height - 1 do
begin
s := ASource.Scanline;
t := ATarget.Scanline;
for j := 0 to aSource.Width - 1 do
begin
//由源图象的象素点的情况获得目标象素点的情况
t^.rgbtBlue := (b * s^.rgbtBlue) div 255;
t^.rgbtGreen := (g * s^.rgbtGreen) div 255;
t^.rgbtRed := (r * s^.rgbtRed) div 255;
inc(s);
inc(t);
end;
end;
end;
