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MD at a glance
MD
Markdown was created in 2004 by John Gruber with Aaron Swartz, but the later CommonMark effort became important because the original syntax description was too ambiguous to keep implementations aligned.
PGM Raw at a glance
PGM Raw
The raw PGM branch reflects the practical evolution of Netpbm-style tool formats: keep the tiny header and easy parsing, but move the pixel raster into a binary form that is much more usable for real data sizes.
Format comparison
| Feature | MD | PGM Raw |
|---|---|---|
| File type | Document | Image |
| Extensions |
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| MIME type |
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| Created year | 2004 | 1988 |
| Inventor | John Gruber and Aaron Swartz | Jef Poskanzer |
| Status | active | active |
| Primary use cases |
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| Vector scaling | Not supported | Not supported |
When to use each format
When to use MD
- Your source file is already in MD.
- Preserve source expectations before exporting to PGM Raw.
- MD is commonly used in document workflows.
When to use PGM Raw
- Your target workflow expects PGM Raw.
- Improve delivery compatibility with PGM Raw.
- PGM Raw is commonly used in image workflows.
FAQs
Why convert MD to PGM Raw?
Convert to PGM raw when a pipeline needs direct grayscale raster data for vision research, microscopy or scientific-image preprocessing, algorithm tests, or command-line tooling where minimal format overhead matters.
It is particularly useful as an intermediate format between automated processing steps.
What changes when converting MD to PGM Raw?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting MD to PGM Raw?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.