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---- [讨论] FB如何让头像变灰? (http://foxtable.com/bbs/dispbbs.asp?boardid=2&id=32727)
-- 发布时间：2013/5/7 11:12:00
-- [讨论] FB如何让头像变灰?
百度来的头像变灰的方法,请高手转为FB可用的代码:
一.
procedure Gray(bmp: TBitmap);
var
p: PByteArray;
w: Integer;
i, j: Integer;
begin
bmp.pixelformat := pf24bit;
for i := 0 to bmp.height - 1 do
begin
p := bmp.scanline[i];
j := 0;
while j < (bmp.width-1) * 3 do
begin
w :=(p[j] * 28 + p[j+1] * 151 + p[j+2]*77);
w := w shr 8;
p[j] := byte(w);
p[j+1] := byte(w);
p[j+2] := byte(w);
inc(j, 3)
end;
end;
end;
二. 微软做好的，GDI+绘制代码：
Graphics graphics(hdc);
Image myImage(L"Image.jpg");
RectF source(0.0f, 0.0f, 330.0f, 300.0f);
RectF destination(20.0f, 20.0f, 330.0f, 300.0f);
DrawImage(graphics, &myImage, destination, source, UnitPixel, NULL); // 绘制原始图像
RectF destination2(420.0f, 20.0f, 330.0f, 300.0f);
#define GRAY 32/256.0f /* gray/full, 0 - 256 : black to white, 16 - 64 is recommended */
#define GRAY 0.125f /* 0.000 - 1.000 : black to white, 0.062 - 0.250 is recommended */
#define FULL 1.000f
#define ZERO 0.000f
// 自由转换
ColorMatrix matrix = {
GRAY, GRAY, GRAY, FULL, ZERO,
GRAY, GRAY, GRAY, FULL, ZERO,
GRAY, GRAY, GRAY, FULL, ZERO,
GRAY, GRAY, GRAY, FULL, ZERO,
ZERO, ZERO, ZERO, ZERO, FULL,
};
ImageAttributes attributes;
attributes.SetColorMatrix(&matrix);
DrawImage(graphics, &myImage, destination2, source, UnitPixel, &attributes); // 绘制转换图像
DrawImage 是自定义函数
C/C++ code
void DrawImage(Graphics& graphics, Image* image, RectF& destination, RectF& source, Unit unit, ImageAttributes* attributes)
{
graphics.DrawImage(image, destination, source.X, source.Y, source.Width, source.Height, unit, attributes);
}
-- 发布时间：2013/5/7 11:57:00
--
全局的apI 通不过哦
-- 发布时间：2013/5/7 12:02:00
--
Windows.Forms.ControlPaint.DrawImageDisabled(Graphics.FromImage(图像), 图像, 0, 0, Color.Transparent) 直接使用这段代码就可以的了.
-- 发布时间：2013/5/7 12:22:00
--
如果希望用代码实现,(可控性比较高) 可以参考我的代码. 可以实现任意灰度,反色 颜色修改等.
Dim SImage As Image = Image.FromFile("C:\\Users\\foxtable1\\Desktop\\70b70d98-1228-4487-93a5-6f7056628d00.jpg")
Dim Height As Integer = SImage.Height
Dim Width As Integer = SImage.Width
Dim bitmap As Bitmap = new Bitmap(Width, Height)
Dim MyBitmap As Bitmap= SImage
Dim pixel As Color
For x As Integer = 0 To Width-1
For y As Integer = 0 To Height-1
pixel = MyBitmap.GetPixel(x, y)
Dim r As Integer = 0
Dim g As Integer = 0
Dim b As Integer = 0
Dim Result As Integer = 0
r = pixel.R
g = pixel.G
b = pixel.B
Dim iType As Integer = 2
Select Case iType
Case 0 \'平均值法
Result = ((r + g + b) / 3)
Case 1 \'最大值法
Result = IIF(r > g ,r , g)
Result = IIF(Result > b,Result,b)
Case 2 \'加权平均值法
Result = ((0.7 * r) + (0.2 * g) + (0.1 * b))
End Select
bitmap.SetPixel(x, y, Color.FromArgb(Result, Result, Result))
Next
Next
bitmap.Save("C:\\Users\\foxtable1\\Desktop\\28d00.jpg")
-- 发布时间：2013/5/7 12:24:00
--
高手
-- 发布时间：2013/5/7 12:28:00
--
好贴收藏
-- 发布时间：2013/5/7 12:29:00
--
高手动手了,学习!
-- 发布时间：2013/5/7 12:37:00
--
保留着 学习
-- 发布时间：2013/5/7 13:08:00
--
Windows.Forms.ControlPaint.DrawImageDisabled(Graphics.FromImage(图像), 图像, 0, 0, Color.Transparent)
完整的语法是怎样的?
-- 发布时间：2013/5/7 13:28:00
--
同问,不知如何设置保存位置 ,
Dim SImage As Image = Image.FromFile("D:\\8d00.jpg")
Dim bcmage As Image = Image.SaveFile("D:\\800.jpg") \' Image.SaveFile报错