January 2023
Intermediate to advanced
288 pages
6h 6m
Chinese
Content preview from 移动端AI与ML应用开发：基于iOS和Android
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36
|
第
3
章
3.1
在
Android
上构建人脸检测应用程序
在接下来的几页中，你将看到一个应用程序的构建过程，该应用程序使用预训练的 ML
模型执行人脸检测，你无须进一步训练即可立即使用。你可以在图 3-1 中看到单个人脸
检测的示例。
图
3-1
：检测图片中的单个人脸
这个相同的模型（以及简单的应用程序）也可以识别图片中的多个面孔，你可以在图 3-2
中看到这一点。我觉得这特别令人印象深刻，因为如果你看前景中的女人，她的脸背对
着相机，我们只能看到它的侧面，但模型仍然可以检测到它！
让我们来看看如何开始在 Android 上创建这样的应用程序！
3.1.1
第
1
步：使用
Android Studio
创建应用程序
本教程的其余部分将使用 Android Studio，希望你至少具备此工具的基本知识，以及使
用 Kotlin 开发 Android 应用程序的相关知识。如果你不熟悉这些，我建议你参加 Google
关于 Kotlin 的 Android 开发的免费课程（
https://oreil.ly/bOja4
）。如果你还没有 Android
Studio，则可以从
https://developer.android.google.cn/studio/
下载。
第一步是使用 Android Studio 创建一个应用程序。因此，当你使用 File（文 件） → New
（新建）命令时，你会看到一个对话框，要求你选择一个项目模板（如图 3-3 所示）。
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