Android Question OCR Offline on screen

[Shivito1]

I would like to use OCR for reading embedded subtitles. I found a lot of great camera OCR but, was unable to adapt it for on-screen detection. I searched quite a bit but not finding exactly what I need.

Any help is greatly appreciated. Thanks in advanced

 

[Erel]

There are many OCR related solutions available: https://www.b4x.com/android/forum/pages/results/?query=b4a+ocr

Some of them work offline.

 

[moster67]

If you play the TV streams with an external player (other app), then I doubt that Android will allow you to capture that screen

Should work fine with my B4A ScreenRecorder/ScreenShots wrapper:
https://www.b4x.com/android/forum/threads/b4a-screenrecorder-screenshots.71348/

 

[Shivito1]

Should work fine with my B4A ScreenRecorder/ScreenShots wrapper:
https://www.b4x.com/android/forum/threads/b4a-screenrecorder-screenshots.71348/

is it possible to capture just a regain of the screen?

 

[Shivito1]

Should work fine with my B4A ScreenRecorder/ScreenShots wrapper:
https://www.b4x.com/android/forum/threads/b4a-screenrecorder-screenshots.71348/

okay I found that I can indicate regain. Of course it seems to be only video.

 

[Shivito1]

Thanks for all the help. I might actually find the time to work on it today. this hobby is very time consuming.

 

[Shivito1]

The first thing to do is to find a way to make a screenshot with your app (sourcecode for that can be found in the forum) This is probably easier to do when the TV stream is played with a video stream player embedded in your project.
You will need to get hold of the stream for each station (often m3u8 types of files or starting with rtmp:// or rtsp://)
I expect that you will need to take screenshots about every second.

If you play the TV streams with an external player (other app), then I doubt that Android will allow you to capture that screen (because such configurations might be construed as spyware). I am planning to experiment with that myself (putting the screenshot routine in a service) because I want to make a subtitle reader for my blind clients.

As OCR solution I suggest you take a look at the OCR project(s) by Johan Schoemann. OCR uses a lot op processor power. I am not sure whether the OCR will be able to keep up with the refresh of new subtitle lines. The whole OCR process should be faster than analysing one TV screenshot about every 2 seconds...

I checked out your suggestion. https://www.b4x.com/android/forum/threads/ocr-ocr-reader-complete.70659/#content
I don't see a way to pass a screen shot through the OCR.

 

[Shivito1]

I have asked Johan Schoemann (a moment ago) to add the feature to perform OCR on a bitmap in stead of a camera snapshot.
I would also like that feature for my future TV subtitles reader.

Awesome. Thanks!

 

[Shivito1]

There are many OCR related solutions available: https://www.b4x.com/android/forum/pages/results/?query=b4a ocr

Some of them work offline.

Thanks but the available solutions don't allow me to scan an image offline.
I assume if I knew java I could update this library https://www.b4x.com/android/forum/threads/ocr-ocr-reader-complete.70659/#content
If you know of another that would work please let me know.

 

[Johan Schoeman]

I have asked Johan Schoemann (a moment ago) to add the feature to perform OCR on a bitmap in stead of a camera snapshot.
I would also like that feature for my future TV subtitles reader.

Try with this....


https://www.b4x.com/android/forum/t...map-using-the-play-services-vision-api.85168/