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什么是二维码,它是如何工作的? - Practical Tips

什么是二维码,它是如何工作的?

by Flo

QR 码几乎随处可见,但它们究竟是如何工作的呢?我们将为您解释二维码的工作原理以及如何安全使用二维码。

什么是 QR 码?

二维码现在随处可见。无论是扫描餐厅的菜单、服务评论还是简单的实用信息,二维码都已在我们的日常生活中占据了一席之地。但究竟什么是 QR 码,它的背后又隐藏着什么?

  • QR 码是 “快速反应代码 “的缩写。这意味着开发二维码的目的是为了快速解码。
  • 与我们熟悉的条形码相比,QR 码是二维的,因此可以容纳更多的信息。二维码可以包含不同类型的数据,包括文本、URL 甚至联系信息。
  • 数据量是有上限的。代码中包含的信息越多,数据量就越大。但上限是 177×177 个元素。根据制造商的说法,这相当于 4296 个字母数字字符或 7089 个十进制数字。
  • 例如,通过二维码,您可以扫描数字名片、查看时刻表信息或获取有关海报或传单的更多信息。
  • QR 代码可以用智能手机和其他带摄像头的设备扫描,前提是这些设备具有相应的功能。扫描代码后,将显示代码所包含的信息。

二维码如何工作?

二维码的工作原理非常简单。尤其是当你只想扫描代码并查看其中包含的信息时。不过,现在创建二维码也非常简单,使用互联网上的程序就可以轻松完成。

  • 作为用户,您只需要一部智能手机就能获取二维码。某些机型需要特定的应用程序来读取二维码(如 Google Lens)。您可以在 App Store 中找到。在其他设备上,如苹果公司的最新版本,只需用普通相机对二维码进行编码,然后点击显示的网站即可。
  • 如果您想自己创建二维码,则需要一个所谓的二维码生成器
  • 借助指南或网站上的详细说明,您只需几步就能创建自己的二维码。您现在可以将其打印出来,或将其镌刻成商业用途的样式。

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