1 /// <summary>
2 /// 马赛克效果
3 ///原理:确定图像的随机位置点和确定马赛克块的大小,然后马赛克块图像覆盖随机点即可.
4 /// </summary>
5 /// <param name="m_Iimage"></param>
6 /// <param name="val">分割成val*val像素的小区块</param>
7 public Image MaSaiKe(Image m_PreImage , int val)
8 {
9 Bitmap MyBitmap = new Bitmap(m_PreImage);
10 if (MyBitmap.Equals(null))
11 {
12 return null;
13 }
14 int iWidth = MyBitmap.Width;
15 int iHeight = MyBitmap.Height;
16 int stdR , stdG , stdB;
17 stdR = 0;
18 stdG = 0;
19 stdB = 0;
20 BitmapData srcData = MyBitmap.LockBits(new Rectangle(0 , 0 , iWidth , iHeight) ,
21 ImageLockMode.ReadWrite , PixelFormat.Format24bppRgb);
22 unsafe
23 {
24 byte* point = (byte*)srcData.Scan0.ToPointer();
25 for (int i = 0; i < iHeight; i++)
26 {
27 for (int j = 0; j < iWidth; j++)
28 {
29 if (i % val == 0)
30 {
31 if (j % val == 0)
32 {
33 stdR = point[2];
34 stdG = point[1];
35 stdB = point[0];
36 }
37 else
38 {
39 point[0] = (byte)stdB;
40 point[1] = (byte)stdG;
41 point[2] = (byte)stdR;
42 }
43 }
44 else
45 {
46 //复制上一行
47 byte* pTemp = point - srcData.Stride;
48 point[0] = (byte)pTemp[0];
49 point[1] = (byte)pTemp[1];
50 point[2] = (byte)pTemp[2];
51 }
52 point += 3;
53 }
54 point += srcData.Stride - iWidth * 3;
55 }
56 MyBitmap.UnlockBits(srcData);
57 }
58 return MyBitmap;
59 }
2 /// 马赛克效果
3 ///原理:确定图像的随机位置点和确定马赛克块的大小,然后马赛克块图像覆盖随机点即可.
4 /// </summary>
5 /// <param name="m_Iimage"></param>
6 /// <param name="val">分割成val*val像素的小区块</param>
7 public Image MaSaiKe(Image m_PreImage , int val)
8 {
9 Bitmap MyBitmap = new Bitmap(m_PreImage);
10 if (MyBitmap.Equals(null))
11 {
12 return null;
13 }
14 int iWidth = MyBitmap.Width;
15 int iHeight = MyBitmap.Height;
16 int stdR , stdG , stdB;
17 stdR = 0;
18 stdG = 0;
19 stdB = 0;
20 BitmapData srcData = MyBitmap.LockBits(new Rectangle(0 , 0 , iWidth , iHeight) ,
21 ImageLockMode.ReadWrite , PixelFormat.Format24bppRgb);
22 unsafe
23 {
24 byte* point = (byte*)srcData.Scan0.ToPointer();
25 for (int i = 0; i < iHeight; i++)
26 {
27 for (int j = 0; j < iWidth; j++)
28 {
29 if (i % val == 0)
30 {
31 if (j % val == 0)
32 {
33 stdR = point[2];
34 stdG = point[1];
35 stdB = point[0];
36 }
37 else
38 {
39 point[0] = (byte)stdB;
40 point[1] = (byte)stdG;
41 point[2] = (byte)stdR;
42 }
43 }
44 else
45 {
46 //复制上一行
47 byte* pTemp = point - srcData.Stride;
48 point[0] = (byte)pTemp[0];
49 point[1] = (byte)pTemp[1];
50 point[2] = (byte)pTemp[2];
51 }
52 point += 3;
53 }
54 point += srcData.Stride - iWidth * 3;
55 }
56 MyBitmap.UnlockBits(srcData);
57 }
58 return MyBitmap;
59 }