Generally speaking, you cannot really convert pictures (for example .jpg) to text files (for example .rtf). However, there are two situations that would roughly represent some sort of data transfer between picture to text transfer.
First, you can simply import the picture as an object in a new or already existing document. Second option would be to recover a text from the picture using some kind of OCR (optical character recognition) solution.
Updated: June 15, 2022