From 71b760b0f65401682c43fc2914bebece1393db7f Mon Sep 17 00:00:00 2001
From: p8btn9vm4 <349074866@qq.com>
Date: Sun, 1 Dec 2024 17:25:05 +0800
Subject: [PATCH] ADD file via upload

---
 blur_2.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 blur_2.c

diff --git a/blur_2.c b/blur_2.c
new file mode 100644
index 0000000..626ff8e
--- /dev/null
+++ b/blur_2.c
@@ -0,0 +1,51 @@
+#include <stdio.h>  
+#include <time.h>  
+
+#define IDX(n) ((n) % 3)
+
+float kx[3] = { 0.25, 0.5, 0.25 };
+float ky[3] = { 0.25, 0.5, 0.25 };
+
+void applySeparableGaussianBlur(float src[5][5], float dst[5][5], int h, int w, float kx[3], float ky[3]) {
+    float buf[5][5] = { 0 };
+
+    for (int i = 0; i < h; i++) {
+        for (int j = 1; j < w - 1; j++) {
+            buf[i][j] = src[i][j - 1] * kx[0] + src[i][j] * kx[1] + src[i][j + 1] * kx[2];
+        }
+    }
+
+    for (int i = 1; i < h - 1; i++) {
+        for (int j = 0; j < w; j++) {
+            dst[i][j] = buf[i - 1][j] * ky[0] + buf[i][j] * ky[1] + buf[i + 1][j] * ky[2];
+        }
+    }
+}
+int main() {
+    float src[5][5] = {
+        {1, 2, 3, 4, 5},
+        {6, 7, 8, 9, 10},
+        {11, 12, 13, 14, 15},
+        {16, 17, 18, 19, 20},
+        {21, 22, 23, 24, 25}
+    };
+
+    float dst[5][5] = { 0 };
+
+    clock_t start = clock();
+    applySeparableGaussianBlur(src, dst, 5, 5, kx, ky);
+    clock_t end = clock();
+
+    printf("模糊后的图像矩阵:\n");
+    for (int i = 0; i < 5; i++) {
+        for (int j = 0; j < 5; j++) {
+            printf("%.2f ", dst[i][j]);
+        }
+        printf("\n");
+    }
+
+    double time_taken = (double)(end - start) / CLOCKS_PER_SEC;
+    printf("运行时间: %e 秒\n", time_taken);
+
+    return 0;
+}
\ No newline at end of file