Android Question Detect and decoding morse codes with the phone camera

[jemajuca]

Hi all!
Following the Johan Schoeman posts https://www.b4x.com/android/forum/t...rom-the-flash-and-the-vibrator.48785/#content
I need to make the opposed function, detect the morse codes with the phone camera and decode it to obtaing the sent character.
Any recommedation for this particular task?

 

[JordiCP]

You'll need to measure lightness in the preview, perhaps in the whole image or a specific region. Possibly you'll need some kind of calibration to know what is a 1 and a 0

Such detection can be done with opencv, which is overkill but will work, or subsampling the preview, whatever you prefer

Then you'll need a morse software "decoder" based on the light and timing detected

 

[jemajuca]

Hi JordiCP, thank you for your help.
Really it will be enough to catch the preview on photo mode and process the bright changes on realtime.
I was seeing different camera libraries, but I need it to work on API 19.

 

[JordiCP]

You can use CameraEx with the preview callback