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PFM Raw at a glance
PFM Raw
PFM persists from the era when HDR imaging, rendering research, and tone-mapping workflows needed straightforward file carriers for floating-point image data long before mainstream consumer HDR delivery formats matured.
CRW at a glance
CRW
Early Canon digital-camera workflows used raw formats like CRW before the later EOS raw families stabilized around CR2 and then CR3.
Format comparison
| Feature | PFM Raw | CRW |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1998 | 2000 |
| Inventor | PBRT / Paul Debevec community | Canon |
| 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 | Supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PFM Raw
- Your source file is already in PFM Raw.
- Preserve source expectations before exporting to CRW.
- PFM Raw is commonly used in image workflows.
When to use CRW
- Your target workflow expects CRW.
- Improve delivery compatibility with CRW.
- CRW is commonly used in image workflows.
FAQs
Why convert PFM Raw to CRW?
Convert to CRW when maintaining compatibility with older Canon raw libraries or recovering historical camera originals.
In most current workflows it is a source to preserve or migrate, not a preferred new output format.
What changes when converting PFM Raw to CRW?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to CRW adds camera raw data. Moving to CRW removes HDR content.
What should I review after converting PFM Raw to CRW?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.