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PNM Raw at a glance
PNM Raw
PNM survived because engineers kept needing a no-drama raster family for scripts, fixtures, codecs, and image-processing experiments where the format should not be the hard part.
FITS at a glance
FITS
FITS became a durable scientific standard because observatories, spacecraft, and analysis tools needed a stable interchange format that outlived individual instruments and software stacks.
Format comparison
| Feature | PNM Raw | FITS |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 1981 |
| Inventor | Jef Poskanzer | NASA / astronomical data community |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PNM Raw
- Your source file is already in PNM Raw.
- Preserve source expectations before exporting to FITS.
- PNM Raw is commonly used in image workflows.
When to use FITS
- Your target workflow expects FITS.
- Improve delivery compatibility with FITS.
- FITS is commonly used in image workflows.
FAQs
Why convert PNM Raw to FITS?
Convert to FITS when preserving scientific image data, observation metadata, or instrument-derived captures for astronomy and research workflows.
It is the right target when measurement context matters as much as the picture itself.
What changes when converting PNM Raw to FITS?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting PNM Raw to FITS?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.