diff --git a/lab-3/lab3-1.cpp b/lab-3/lab3-1.cpp
index 6c70f58..521d328 100644
--- a/lab-3/lab3-1.cpp
+++ b/lab-3/lab3-1.cpp
@@ -20,19 +20,19 @@ int main()
     fread(grey, sizeof(unsigned char), H * W, f);
     fclose(f);
 
-    // 模板
+    // prewitt模板
     int tw = 3;
     int th = 3;
     int template1[9]={-1,0,1,-1,0,1,-1,0,1};
     int template2[9]={-1,-1,-1,0,0,0,1,1,1};
 
-    int i,j,k,l;
-    unsigned char *result_grey;
-    result_grey = new unsigned char[H * W];
+    int i,j,k,l;    // 中间变量
+    unsigned char *result;
+    result = new unsigned char[H * W];
 
     for (i = 0; i < H * W; i++)
     {
-        result_grey[i] = 255;
+        result[i] = 255;
     }
     for (i = th / 2; i < H - th / 2; i++)
     {
@@ -53,23 +53,27 @@ int main()
             sum=abs(sum1)+abs(sum2);
             if(sum>100)
             {
-                result_grey[i * W + j] = 0;
+                result[i * W + j] = 0;
             }
             else
             {
-                result_grey[i * W + j] = 255;
+                result[i * W + j] = 255;
             }
         }
     }
-    FILE *fnew;
-    fopen_s(&fnew, "./数据/prewitt.raw", "wb");
-    if (fnew)
+
+    // 将结果写入文件
+    FILE *fresult;
+    fopen_s(&fresult, "./数据/prewitt.raw", "wb");
+    if (fresult)
     {
-        fwrite(result_grey, sizeof(unsigned char), H * W, fnew);
+        fwrite(result, sizeof(unsigned char), H * W, fresult);
+        fclose(fresult);
     }
     else
     {
         cout << "创建文件失败" << endl;
         return 0;
     }
+    return 0;
 }
\ No newline at end of file
diff --git a/lab-3/lab3-2.cpp b/lab-3/lab3-2.cpp
index 8c6c615..b577f32 100644
--- a/lab-3/lab3-2.cpp
+++ b/lab-3/lab3-2.cpp
@@ -12,7 +12,7 @@ int main()
     unsigned char *grey;
     grey = new unsigned char[H * W];
     FILE *f;
-    fopen_s(&f, "./数据/blood.raw", "rb");
+    fopen_s(&f, "./����/blood.raw", "rb");
     if (f)
     {
         fread(grey, sizeof(unsigned char), H * W, f);
@@ -20,30 +20,28 @@ int main()
     }
     else
     {
-        cout << "无法打开文件" << endl;
+        cout << "�޷����ļ�" << endl;
         return 0;
     }
-    fread(grey, sizeof(unsigned char), H * W, f);
-    fclose(f);
 
-    // 模板
+    // ������˹ģ��
     int tw = 3;
     int th = 3;
     int template1[9]={0,1,0,1,-4,1,0,1,0};
 
-    int i,j,k,l;
-    unsigned char *result_grey;
-    result_grey = new unsigned char[H * W];
+    int i,j,k,l;    // ����
+    unsigned char *result;
+    result = new unsigned char[H * W];
 
     for (i = 0; i < H * W; i++)
     {
-        result_grey[i] = 255;
+        result[i] = 255;
     }
     for (i = th / 2; i < H - th / 2; i++)
     {
         for (j = tw / 2; j < W - tw / 2; j++)
         {
-            // 应用拉普拉斯模板
+            // Ӧ��������˹ģ��
             int sum = 0;
             for (k = -th / 2; k <= th / 2; k++)
             {
@@ -52,25 +50,31 @@ int main()
                     sum += grey[(i + k) * W + (j + l)] * template1[(k + th / 2) * tw + (l + tw / 2)];
                 }
             }
-            if (sum > 100)
+            sum = abs(sum);
+            if (sum < 1)
             {
-                result_grey[i * W + j] = 0;
+                result[i * W + j] = 0;
             }
             else
             {
-                result_grey[i * W + j] = 255;
+                result[i * W + j] = 255;
             }
         }
     }
-    FILE *fnew;
-    fopen_s(&fnew, "./数据/laplacian.raw", "wb");
-    if (fnew)
+
+    // �����д���ļ�
+    FILE *fresult;
+    fopen_s(&fresult, "./����/laplacian.raw", "wb");
+    if (fresult)
     {
-        fwrite(result_grey, sizeof(unsigned char), H * W, fnew);
+        fwrite(result, sizeof(unsigned char), H * W, fresult);
+        fclose(fresult);
     }
     else
     {
-        cout << "创建文件失败" << endl;
+        cout << "�����ļ�ʧ��" << endl;
         return 0;
     }
+
+    return 0;
 }
\ No newline at end of file
diff --git a/lab-3/lab3-3.cpp b/lab-3/lab3-3.cpp
index 1ef82d5..2e71db7 100644
--- a/lab-3/lab3-3.cpp
+++ b/lab-3/lab3-3.cpp
@@ -24,18 +24,20 @@ int main()
         return 0;
     }
 
+    // sobel模板
     int tw = 3;
     int th = 3;
+    // xy方向的sobel模板
     int sobel_x[9]={-1,0,1,-2,0,2,-1,0,1};
     int sobel_y[9]={-1,-2,-1,0,0,0,1,2,1};
 
-    int i,j,k,l;
-    unsigned char *result_grey;
-    result_grey = new unsigned char[H * W];
+    int i,j,k,l;    // 中间变量
+    unsigned char *result;
+    result = new unsigned char[H * W];
 
     for (i = 0; i < H * W; i++)
     {
-        result_grey[i] = 255;
+        result[i] = 255;
     }
     for (i = th / 2; i < H - th / 2; i++)
     {
@@ -56,20 +58,22 @@ int main()
             int sum = (int)sqrt(gx * gx + gy * gy);
             if (sum > 100)
             {
-                result_grey[i * W + j] = 0;
+                result[i * W + j] = 0;
             }
             else
             {
-                result_grey[i * W + j] = 255;
+                result[i * W + j] = 255;
             }
         }
     }
-    FILE *fnew;
-    fopen_s(&fnew, "./数据/sobel.raw", "wb");
-    if (fnew)
+
+    // 将结果写入文件
+    FILE *fresult;
+    fopen_s(&fresult, "./数据/sobel.raw", "wb");
+    if (fresult)
     {
-        fwrite(result_grey, sizeof(unsigned char), H * W, fnew);
-        fclose(fnew);
+        fwrite(result, sizeof(unsigned char), H * W, fresult);
+        fclose(fresult);
     }
     else
     {
diff --git a/lab-3/数据/laplacian.raw b/lab-3/数据/laplacian.raw
index b77936c..5a78f47 100644
Binary files a/lab-3/数据/laplacian.raw and b/lab-3/数据/laplacian.raw differ