图像处理

Posted 2021-01-16 506941763lcj

 1 #include<graphics.h>
 2 #include<conio.h>
 3 
 4 void Mosaic(IMAGE *img, int size, int sx, int sy)
 5 {
 6     int width = img->getheight();//获取图形的宽
 7     int height = img->getwidth();
 8     int redsum;//红色的值的和
 9     int bluesum;//蓝色值的和
10     int greensum;//绿色值和
11     int counnt;//每个小方块内的像素数量
12     int color;//每个像素的颜色
13     int x, y, tx, ty;
14     DWORD* p = GetImageBuffer(img);//获取指向显存的指针
15 
16     //求左上角第一个樊哙的坐标
17     sx = (sx%size==0?0:sx%size-size);
18     sy = (sy%size == 0 ? 0 : sy%size - size);
19     //循环小方块
20     for (y = sy; y < height;y+=size)
21     {
22         for (x = sx; x < width;x+=size)
23         {
24             redsum = greensum = bluesum = counnt = 0;
25             //遍历像素点
26             for (ty = min(y + size, height) - 1; ty >= max(y, 0); ty--)
27             {
28                 for (tx = min(x + size, width)-1; tx >= max(x, 0); tx--)
29                 {
30                     color = p[ty*width + tx];
31                     redsum += GetRValue(color);
32                     greensum+=GetGValue(color);
33                     bluesum += GetBValue(color);
34                     counnt++;
35                 }
36             }
37 
38 
39             redsum /= counnt;
40             greensum /= counnt;
41             bluesum /= counnt;
42             color = RGB(redsum, greensum, bluesum);
43             for (ty = min(y + size, height) - 1; ty >= max(y, 0); ty--)
44             {
45                 for (tx = min(x + size, width) - 1; tx >= max(x, 0); tx--)
46                 {
47                     p[ty*width + tx] = color;
48                 }
49             }
50 
51         }
52     }
53 
54 }
55 
56 int main()
57 {
58     //搭建绘图环境
59     initgraph(640, 480);
60     //setbkcolor(RED);
61     //cleardevice();
62     IMAGE img;
63     loadimage(&img,L"11.jpg", 640, 480);
64     putimage(0, 0, &img);
65     _getch();
66     Mosaic(&img, 5, 0, 0);
67     putimage(0,0,&img);
68     //loadimage(NULL,L"11.jpg");
69     _getch();
70     return 0;
71 }