TI-Reader Converter can convert images (JPEG, GIF or PNG) that are referenced in a .HTML file which is being converted for formats useable on TI devices. This conversion will produce .v2y (Voyage 200), .9xy (TI-92) or .89y (TI-89) files that can be transferred and later viewed on the respective devices.
You cannot convert just single images, it must always be done as part of HTML conversion.
Updated: December 15, 2022