把验证码变大

file-upload-site/app.py

@@ -90,7 +90,7 @@ def generate_captcha_text(length: int = 4) -> str:
 
 def generate_captcha_image(text: str) -> Image.Image:
     """生成验证码图片（含干扰线和噪点）"""
-    width, height = 140, 48
+    width, height = 220, 70
     # 浅色随机背景
     bg_color = (random.randint(235, 255), random.randint(235, 255), random.randint(235, 255))
     image = Image.new('RGB', (width, height), bg_color)
@@ -104,20 +104,20 @@ def generate_captcha_image(text: str) -> Image.Image:
         draw.line([(x1, y1), (x2, y2)], fill=line_color, width=1)
 
     # 噪点
-    for _ in range(80):
+    for _ in range(120):
         x, y = random.randint(0, width - 1), random.randint(0, height - 1)
         dot_color = (random.randint(140, 200), random.randint(140, 200), random.randint(140, 200))
         draw.point((x, y), fill=dot_color)
 
     # 绘制文字
     try:
-        font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", 30)
+        font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", 50)
     except OSError:
         font = ImageFont.load_default()
 
     for i, char in enumerate(text):
-        x = 12 + i * 30
-        y = random.randint(4, 10)
+        x = 16 + i * 50
+        y = random.randint(4, 12)
         color = (random.randint(0, 80), random.randint(0, 80), random.randint(0, 80))
         draw.text((x, y), char, font=font, fill=color)