The jmh file extension is related to the JPEG File Interchange Format bitmap image.
JMH file extension - JPEG File Interchange Format bitmap image
What is jmh file? How to open jmh files?
File type specification:
The jmh file extension is used for bitmap files, that use JPEG File Interchange Format.
JPEG File Interchange Format for exchanging JPEG encoded files. The native file extension, that is used by JPEG File Interchange Format is JIF.
This jmh file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.