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App Inventor 2 OCR 文字识别方案：在线云 API 与离线拓展 · App Inventor 2 中文网
... 2、使用现有OCR拓展
> NMD OCR
> OCRSpace
3、离线 OCR 拓展：本地识别，不依赖云服务
4、如何选型
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OCR 可以走在线云 API，也可以直接在手机本地识别：
方案
适合场景
需要注意...
Is there a way to detect if a browser window is not currently active?
...swer, a new specification has reached recommendation status thanks to the W3C. The Page Visibility API (on MDN) now allows us to more accurately detect when a page is hidden to the user.
document.addEventListener("visibilitychange", onchange);
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Chrome 13+
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Html List tag not working in android textview. what can i do?
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answered Jun 30 '10 at 14:57
CristianCristian
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What are database normal forms and can you give examples? [closed]
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1NF is the most basic of normal forms - each cell in a table must contain only one piece of inf...
How can I get stock quotes using Google Finance API?
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Android: Scale a Drawable or background image?
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ByteArray 实验 - 拼一个二进制协议帧，再把它拆开 · App Inventor 2 中文网
... 步：拼出这一帧
第 2 步：把它拆回来
第 3 步：校验和对不对
第 4 步：加一段文本
五、排错表
六、下一步
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answered Jul 30 '09 at 19:16
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