Rav Wosner was asked (Shevet HaLevi 8:29) about an ingenious idea for a Shul without a Baal Korei. You make a transparent overlay with Nikudos and taamim and place it on the words of the Sefer Torah. This way you are reading the actual Sefer Torah and any amateur can become a professional Baal Korei without mistakes.
He answers that technically this is permitted since reading through plastic or glass is considered reading the actual scroll. However, he says that he does not feel comfortable giving his stamp to this new innovation. He suggests solving the problem in the traditional way, which is for someone with a Chumash to whisper into the ear of the Baal Korei and the Baal Korei read from the Sefer Torah. He also comments that this is different than reading through eye glasses which is perfectly acceptable.