Recognize texts inside a red circle only

Question

I am using mobile vision api for text recognition.
I want the app to only read the text inside a let's say red circle.
How can I do that?

Answer 1

MV API doesn't support that feature directly.

But you should be able to detect all texts, detect the red circle using Hough transform, then check if these texts are in the circle since MV API reports the coordinates of the text.