实验2代码

lab-2/lab-2.cpp

@@ -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);
+}