c#图像处理基础
2010-09-30 21:04:54 来源:WEB开发网图片看不清楚?请点击这里查看原图(大图)。
6.其他颜色处理
1: /// <summary>
2: /// 逆反处理
3: /// </summary>
4: /// <param name="sender"></param>
5: /// <param name="e"></param>
6: void ReverseMenuClick(object sender, EventArgs e)
7: {
8: Bitmap bmp=new Bitmap(pictureBox1.Image);
9: Bitmap newbmp=new Bitmap(pictureBox1.Image);
10: Color c=new Color();
11: Color NewC;
12:
13: for (int i=0;i<bmp.Width ;i++ )
14: {
15: for (int j=0; j<bmp.Height; j++) {
16: c=bmp.GetPixel(i,j);
17: NewC=Color.FromArgb(255-c.R,255-c.G,255-c.B);
18: newbmp.SetPixel(i,j,NewC);
19: }
20: }
21:
22: // 刷新显示
23: pictureBox2.Refresh();
24: pictureBox2.Image=newbmp;
25: }
26:
27: /// <summary>
28: /// 平滑处理 采用3x3窗口的中止代替该像素值
29: /// 注:不处理边缘
30: /// </summary>
31: /// <param name="sender"></param>
32: /// <param name="e"></param>
33: void SmoothMenuClick(object sender, EventArgs e)
34: {
35: Bitmap bmp=new Bitmap(pictureBox1.Image);
36: Bitmap newbmp=new Bitmap(pictureBox1.Image);
37: Color c=new Color();
38: Color NewC;
39: Byte r,g,b;
40: int r2,g2,b2;
41:
42: for (int i=1;i<bmp.Width-1 ;i++ )
43: {
44: for (int j=1; j<bmp.Height-1; j++) {
45: r2=0;g2=0;b2=0;
46: for (int k1=-1; k1<=1; k1++) {
47: for (int k2=-1; k2<=1; k2++) {
48: c=bmp.GetPixel(i+k1,j+k2);
49: r=c.R;
50: g=c.G;
51: b=c.B;
52:
53: r2=r2+r;
54: g2=g2+g;
55: b2=b2+b;
56: }
57: }
58:
59: r2=(Byte)(r2/9);
60: g2=(Byte)(g2/9);
61: b2=(Byte)(b2/9);
62: NewC=Color.FromArgb(r2,g2,b2);
63: newbmp.SetPixel(i,j,NewC);
64: }
65: }
66:
67: // 刷新显示
68: pictureBox2.Refresh();
69: pictureBox2.Image=newbmp;
70: }
71:
72: /// <summary>
73: /// 首先计算源图像的像素(i, j)点的分量值与同行的下一个像素
74: /// (i+1, j)以及相同列的下一个像素(i, j+1)的分量的梯度,
75: /// 即差的平方和的平方根,然后将梯度值作为新的像素重新放回(i, j)
76: /// </summary>
77: void NihongMenuClick(object sender, EventArgs e)
78: {
79: Bitmap bmp=new Bitmap(pictureBox1.Image);
80: Bitmap newbmp=new Bitmap(pictureBox1.Image);
81: Color c1=new Color();
82: Color NewC;
83: int r1,r2,r3,g1,g2,g3,b1,b2,b3,rr,gg,bb;
84:
85: for (int i=0;i<bmp.Width;i++ )
86: {
87: for (int j=0; j<bmp.Height; j++) {
88: c1 = bmp.GetPixel(i, j);
89: r1 = c1.R;
90: g1 = c1.G;
91: b1 = c1.B;
92: if (i+1==bmp.Width) {
93: c1 = bmp.GetPixel(i , j);
94: }
95: else
96: {
97: c1 = bmp.GetPixel(i + 1, j);
98: }
99: r2 = c1.R;
100: g2 = c1.G;
101: b2 = c1.B;
102: if (j+1==bmp.Height) {
103: c1 = bmp.GetPixel(i , j);
104: }
105: else
106: {
107: c1 = bmp.GetPixel(i, j+1);
108: }
109: r3 = c1.R;
110: g3 = c1.G;
111: b3 = c1.B;
112: rr = (int)(255-2 * Math.Sqrt((r1 - r2) * (r1 - r2) + (r1 - r3) * (r1 - r3)));
113: gg = (int)(255-2 * Math.Sqrt((g1 - g2) * (g1 - g2) + (g1 - g3) * (g1 - g3)));
114: bb = (int)(255-2 * Math.Sqrt((b1 - b2) * (b1 - b2) + (b1 - b3) * (b1 - b3)));
115: NewC=Color.FromArgb((Byte)rr,(Byte)gg,(Byte)bb);
116: newbmp.SetPixel(i,j,NewC);
117: }
118: }
119:
120: // 刷新显示
121: pictureBox2.Refresh();
122: pictureBox2.Image=newbmp;
123: }
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