We have found one software suitable in our database for this conversion.
It should be possible to use pictures of symbols or letters (for example saved in TIFF format) for making new fonts, which can be saved as TrueType fonts (.ttf). The best program for this would be one of the font editors, such as BitFonter.
Updated: September 19, 2016
BitFonter is a professional bitmap font editor for Mac OS X and Windows. It allows creative professionals, web designers and manufacturers of electronic devices to create and modify bitmap fonts for print publications, web pages, animations, computer games and electronic devices, convert between bitmap font formats as well as from and to outline font formats, and apply special effects to your outline fonts when used together with TypeTool, FontLab Studio or AsiaFont Studio.