Why QR Codes Are More Than Just Squares

课文

1. QR codes store data in both horizontal and vertical directions, unlike standard barcodes.

   二维码在水平和垂直两个方向存储数据，而普通条形码只能沿一个方向存储。

2. Each black-and-white module represents binary digits that scanners decode into text, URLs, or commands.

   每个黑白模块代表一个二进制位，扫描器将其解码为文本、网址或指令。

3. Modern smartphones read them instantly using built-in cameras and image-processing algorithms.

   现代智能手机利用内置摄像头和图像处理算法，可即时读取二维码。

4. Restaurants use them for contactless menus; museums embed them in exhibits for audio explanations.

   餐厅用其提供无接触菜单，博物馆则将其嵌入展品中以提供语音讲解。

5. Their error-correction capability allows scanning even if part of the code is damaged or obscured.

   其纠错能力使得即使部分码图受损或被遮挡，仍可正常扫描。

6. Developers can customize colors and logos while preserving readability—making them useful for branding.

   开发者可在保持可读性的前提下自定义颜色和图标，便于品牌应用。

7. Security features like dynamic QR codes help prevent fraud by changing content after each scan.

   动态二维码等安全功能可通过每次扫描后更新内容来防范欺诈。

8. Because they require no internet to generate, QR codes remain widely accessible across device types.

   由于生成无需联网，二维码在各类设备上均广泛可用。