First, thanks for your answers.
@alexandrecc @niyazpk I'm indeed trying to detect text in pictures. They're not street signs, but rather products from daily life (e.g a bottle) or things like that. Thus I'm not sure tesseract is the solution...
@karthik_k314 I've been through deepdetect and they have spectacularly easy to consume Docker images for localization and classification. I couldn't find any ready-to-use text recognition model though. Did you go through it ?
Google's Cloud API for Text Detection works really well... I don't know what they use