I am developing a iOS app, for which the main screen is used to scan a QR code. I want the camera to cover the screen, and at the same time display several text elements.
My main strategy so far has been to use semi-transparency. The top banner uses a semi-transparent background, and all the other UI elements have semi-transparent color.
My main worry is that the UI elements should be readable under both bright and dark lighting. At the moment, the text is not very readable with a bright camera feed.
What are "tricks" to make UI elements more readable when overlaid on top of a camera feed? Note that I want to keep the UI clean and minimal.