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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.
PBM at a glance
PBM
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 | CRW | PBM |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2000 | 1988 |
| Inventor | Canon | 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 CRW
- Your source file is already in CRW.
- Preserve source expectations before exporting to PBM.
- CRW is commonly used in image workflows.
When to use PBM
- Your target workflow expects PBM.
- Improve delivery compatibility with PBM.
- PBM is commonly used in image workflows.
FAQs
Why convert CRW to PBM?
Convert to PBM when you need a bare-bones monochrome raster for command-line tooling, research, or low-level graphics processing.
It is useful for simple binary image exchange and intermediate processing.
What changes when converting CRW to PBM?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PBM removes camera raw data.
What should I review after converting CRW to PBM?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.