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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.
NRW at a glance
NRW
NRW reflects the period when some advanced compact cameras offered raw capture and needed to participate in the same post-processing expectations as larger interchangeable-lens systems.
Format comparison
| Feature | PGM Raw | NRW |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
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| Created year | 1988 | 2008 |
| Inventor | Jef Poskanzer | Nikon |
| Status | active | proprietary |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
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| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Not supported | Supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PGM Raw
- Your source file is already in PGM Raw.
- Preserve source expectations before exporting to NRW.
- PGM Raw is commonly used in image workflows.
When to use NRW
- Your target workflow expects NRW.
- Improve delivery compatibility with NRW.
- NRW is commonly used in image workflows.
FAQs
Why convert PGM Raw to NRW?
Convert to NRW when preserving Nikon compact-camera originals or maintaining compatibility with workflows built around that raw variant.
It is useful for archive retention and raw-photo adjustment.
What changes when converting PGM Raw to NRW?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to NRW adds camera raw data.
What should I review after converting PGM Raw to NRW?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.