怀旧风格滤镜
最后更新于:2022-04-01 06:45:57
怀旧风格滤镜
本文介绍一款怀旧风格滤镜特效的代码实现,这个滤镜效果跟前面我们介绍的老照片滤镜效果相比,听起来感觉没太大差,实际上老照片不仅 有怀旧的风格,更多了一些怀旧的痕迹,比如照片的褶皱,裂纹等等,而怀旧风格,只是一种发黄的颜色风格而已。
下面给出怀旧风格的代码:
~~~
private Bitmap FilterProcess(Bitmap a)
{
Bitmap srcBitmap = new Bitmap(a);
int w = srcBitmap.Width;
int h = srcBitmap.Height;
System.Drawing.Imaging.BitmapData srcData = srcBitmap.LockBits(new Rectangle(0, 0, w, h), System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
byte* pSrc = (byte*)srcData.Scan0;
int offset = srcData.Stride - w * 4;
int b = 0, g = 0, r = 0, gray = 0;
for (int j = 0; j < h; j++)
{
for (int i = 0; i < w; i++)
{
b = pSrc[0];
g = pSrc[1];
r = pSrc[2];
gray = (272 * r + 534 * g + 131 * b) / 1000;
pSrc[0] = (byte)(Math.Min(255, Math.Max(0, gray)));
gray = (349 * r + 686 * g + 168 * b) / 1000;
pSrc[1] = (byte)(Math.Min(255, Math.Max(0, gray)));
gray = (393 * r + 769 * g + 189 * b) / 1000;
pSrc[2] = (byte)(Math.Min(255, Math.Max(0, gray)));
pSrc += 4;
}
pSrc += offset;
}
srcBitmap.UnlockBits(srcData);
return srcBitmap;
}
~~~
代码很短,也很简单,效果却还 不错,下面看下效果:
[![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-01-05_568b3321ba97c.jpg)](http://www.zealpixel.com/data/attachment/portal/201508/12/221721k2rrntdrodprddc8.jpg)
原图
[![](https://docs.gechiui.com/gc-content/uploads/sites/kancloud/2016-01-05_568b3321d6643.png)](http://www.zealpixel.com/data/attachment/portal/201508/12/221720f6egu7w297eu29gy.png)
怀旧风格效果
最后,给出一个完整的程序DEMO下载链接:[http://www.zealpixel.com/thread-77-1-1.html](http://www.zealpixel.com/thread-77-1-1.html)
DEMO中包含C#/C两种语言接口实现,希望大家喜欢!