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PAM at a glance
PAM
PBM, PGM, PPM, PNM, and later PAM come from the tool-centric tradition of keeping image interchange formats easy to parse, script, and transform.
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 | PAM | NRW |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2000 | 2008 |
| Inventor | Jef Poskanzer / Netpbm lineage | Nikon |
| Status | active | proprietary |
| 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 | Supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PAM
- Your source file is already in PAM.
- Preserve source expectations before exporting to NRW.
- PAM 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 PAM 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 PAM 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 PAM to NRW?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.