From 113801ae592774e74b17ca724639ca5821e50083 Mon Sep 17 00:00:00 2001
From: 2509165025 <2509165025@student.edu.cn>
Date: Thu, 16 Apr 2026 15:47:19 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E6=88=90=E4=BD=9C=E4=B8=9A?=
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---
 25 (2).py     | 21 +++++++++++++++++++++
 25 (3).py     | 16 ++++++++++++++++
 2509165025.py | 26 ++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)
 create mode 100644 25 (2).py
 create mode 100644 25 (3).py
 create mode 100644 2509165025.py

diff --git a/25 (2).py b/25 (2).py
new file mode 100644
index 0000000..d610587
--- /dev/null
+++ b/25 (2).py	
@@ -0,0 +1,21 @@
+import numpy as np
+
+img = np.array([
+    [255, 255, 0,   0],
+    [255, 255, 0,   0],
+    [0,   0,   255, 255],
+    [0,   0,   255, 255]
+], dtype=np.uint8)
+
+white_count = np.sum(img == 255)
+black_count = np.sum(img == 0)
+print(f"白色像素(255)数量：{white_count}")
+print(f"黑色像素(0)数量：{black_count}")
+
+img_flip = np.fliplr(img)
+print("\n水平翻转后：")
+print(img_flip)
+
+img_rot = np.flipud(img.T)
+print("\n逆时针旋转90度后：")
+print(img_rot)
\ No newline at end of file
diff --git a/25 (3).py b/25 (3).py
new file mode 100644
index 0000000..5b0b6df
--- /dev/null
+++ b/25 (3).py	
@@ -0,0 +1,16 @@
+import numpy as np
+
+feature_map1 = np.array([[1, 0, 1], [0, 1, 0], [1, 0, 1]])
+feature_map2 = np.array([[1, 1, 1], [1, 0, 0], [1, 0, 0]])
+
+vector1 = feature_map1.flatten()  
+vector2 = feature_map2.flatten()  
+
+print("vector1:", vector1)
+print("vector2:", vector2)
+
+euclidean_dist = np.linalg.norm(vector1 - vector2)
+print("\n欧几里得距离:", euclidean_dist)
+
+cos_sim = np.dot(vector1, vector2) / (np.linalg.norm(vector1) * np.linalg.norm(vector2))
+print("余弦相似度:", cos_sim)
\ No newline at end of file
diff --git a/2509165025.py b/2509165025.py
new file mode 100644
index 0000000..891d3ec
--- /dev/null
+++ b/2509165025.py
@@ -0,0 +1,26 @@
+import numpy as np
+
+image = np.array([
+    [100, 150, 200],
+    [80, 120, 180],
+    [60, 90, 140]
+], dtype=np.uint8)
+
+print("原图：")
+print(image)
+print("-" * 20)
+
+image_dark = image.astype(np.int16) - 20
+image_dark = np.clip(image_dark, 0, 255).astype(np.uint8)  
+print("变暗20后：")
+print(image_dark)
+print("-" * 20)
+
+image_crop = image[0:2, 0:2]
+print("裁剪左上角2×2区域后：")
+print(image_crop)
+print("-" * 20)
+
+image_flip = np.fliplr(image)
+print("水平翻转后：")
+print(image_flip)
\ No newline at end of file