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ORF at a glance
ORF
ORF belongs to the long Olympus digital-camera story, especially in the Four Thirds and Micro Four Thirds eras where portability and serious editing often coexisted.
PNM at a glance
PNM
PBM, PGM, PPM, PNM, and later PAM come from the tool-centric tradition of keeping image interchange formats easy to parse, script, and transform.
Format comparison
| Feature | ORF | PNM |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2003 | 1988 |
| Inventor | Olympus (now OM System) | Jef Poskanzer / Netpbm lineage |
| Status | proprietary | 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 | Supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use ORF
- Your source file is already in ORF.
- Preserve source expectations before exporting to PNM.
- ORF is commonly used in image workflows.
When to use PNM
- Your target workflow expects PNM.
- Improve delivery compatibility with PNM.
- PNM is commonly used in image workflows.
FAQs
Why convert ORF to PNM?
Convert to PNM when you need a plain, easily processed raster format for scripts, research, or utility pipelines.
It is useful as an intermediate representation in technical imaging workflows.
What changes when converting ORF to PNM?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PNM removes camera raw data.
What should I review after converting ORF to PNM?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.