This conversion seems to be mainly representing an export of maps or other images saved in LizardTech MrSID format (.sid) to some other raster format, for example JPEG 2000 (.jp2, .jk2). It can be done with some dedicated conversion utility, but be prepared that the resulting files may be very large.
Convert LizardTech MrSID image file format to JPEG2000 code stream image.
We found one software available in the database for this conversion.
Microsoft Windows software - convert sid to j2k on Windows
A dedicated converter for SID format
Convert from sid 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.