实验2代码

2026-04-10 11:10:36 +08:00
1 parent 2f5d73de02
commit 3d0e94ce32
@@ -0,0 +1,57 @@
+#include <iostream>
+
+#define H 1210
+#define W 1240
+
+using namespace std;
+
+int main()
+{
+    unsigned char *grey;
+    grey = new unsigned char[H * W];
+    FILE *ftest;
+    fopen_s(&ftest, "E:\\test.raw", "rb");
+    fread(grey, sizeof(unsigned char), H * W, ftest);
+    fclose(ftest);
+    int i,j;
+    int max=0;
+    int min=255;
+    for(i=0;i<H;i++)
+    {
+        for(j=0;j<W;j++)
+        {
+            if(grey[i*W+j]>max)
+            {
+                max=grey[i*W+j];
+            }
+            if(grey[i*W+j]<min)
+            {
+                min=grey[i*W+j];
+            }
+        }
+    }
+    float k = 255.0/(max-min);
+    float b = -k*min;
+    unsigned char *newgrey;
+    newgrey = new unsigned char[H * W];
+    for(i=0;i<H;i++)
+    {
+        for(j=0;j<W;j++)
+        {
+            newgrey[i*W+j] = (unsigned char)(k*grey[i*W+j]+b);
+        }
+    }
+    FILE *fnew;
+    fopen_s(&fnew, "E:\\Digital image process\\lab-2\\第二次上机实验材料\\变换后.raw", "wb");
+    if(fnew)
+    {
+        fwrite(newgrey, sizeof(unsigned char), H * W, fnew);
+    }
+    else
+    {
+        cout << "创建文件失败" << endl;
+        return 0;
+    }
+    fclose(fnew);
+    fclose(ftest);
+}
@@ -0,0 +1,56 @@
+#include<iostream>
+#define H 256
+#define W 256
+
+int main()
+{
+    unsigned char* grey;
+    grey = new unsigned char[H * W];
+    FILE* fp;
+    fopen_s(&fp, "E:\\Digital image process\\lab-2\\第二次上机实验材料\\椒盐噪声.raw", "rb");
+    if (fp)
+    {
+        fread(grey, sizeof(unsigned char), H * W, fp);
+        fclose(fp);
+    }
+    int temph = 3, tempw = 3;
+    unsigned char* newgrey;
+    newgrey = new unsigned char[temph * tempw];
+    unsigned char* result;
+    result = new unsigned char[H * W];
+    int i, j, k, q, m, n;
+    unsigned char g;
+    for (i = temph / 2; i < (H - temph / 2); i++)
+    {
+        for (j = tempw / 2; j < (W - tempw / 2); j++)
+        {
+            for (k = 0; k < temph; k++)
+            {
+                for (q = 0; q < tempw; q++)
+                {
+                    newgrey[k * tempw + q] = grey[(i - temph / 2 + k) * W + (j - tempw / 2 + q)];
+                }
+            }
+            for (m = 0; m < temph * tempw - 1; m++)
+            {
+                for (n = m; n < temph * tempw; n++)
+                {
+                    if (newgrey[m] > newgrey[n])
+                    {
+                        g = newgrey[m];
+                        newgrey[m] = newgrey[n];
+                        newgrey[n] = g;
+                    }
+                }
+            }
+            result[i * W + j] = newgrey[temph * tempw / 2];
+        }
+    }
+    FILE* pfile;
+    fopen_s(&pfile, "E:\\Digital image process\\lab-2\\第二次上机实验材料\\中值滤波结果.raw", "wb");
+    if (pfile)
+    {
+        fwrite(result, sizeof(unsigned char), H * W, pfile);
+        fclose(pfile);
+    }
+}
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