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Does the Machine Vision API work offline?

Does the Google Mobile Vision API ( https://developers.google.com/vision/ ) work offline? Or does he need an internet connection? The sample application does not require permission to access the Internet. This means that the API works completely offline. I am looking for a positive confirmation of this.

PS. I am also looking for more information about this API. For example, does it use neural networks? If so, what algorithms were used? I cannot find a detailed discussion anywhere.

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The API loads the initial library the first time it is used, and then works offline from that point.

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I tried the official sample application here .

I installed the sample application on the device in flight mode and continued to work in airplane mode - it works without problems.
(Note that I tested only part of OCR)

But as far as I know, all google service libraries used an already installed application (on most devices, possibly except China) with the name Google Play Services . While this application is installed on the device (with a sufficiently updated version), the Vision API should work even without an Internet connection.

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Not. I was just trying a standalone API to work on a plane, it looks like it is not working offline. It only worked when I turned on the connection.

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