Instead of pictures, you can also use font files (such as TrueType TTF), for making embroidery designs. This is usually used when slogans and other words should be part of the embroidery. Some tools like Janome Digitalizer Pro support this function and allow users to create broad range of various vendor specific embroidery designs (including .exp files for Melco machines) from .ttf files.
Convert TrueType font file to Melco embroidery design.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert ttf to exp on Windows
An embroidery design tool from Janome
Convert from ttf file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.