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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.
CR2 at a glance
CR2
CR2 became the dominant Canon raw family through the long DSLR era, so huge real-world photo archives still depend on stable CR2 decoding and migration paths.
Format comparison
| Feature | PAM | CR2 |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2000 | 2004 |
| Inventor | Jef Poskanzer / Netpbm lineage | 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 | 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 CR2.
- PAM is commonly used in image workflows.
When to use CR2
- Your target workflow expects CR2.
- Improve delivery compatibility with CR2.
- CR2 is commonly used in image workflows.
FAQs
Why convert PAM to CR2?
Convert to CR2 when preserving Canon originals or maintaining a workflow that expects Canon raw files.
It is useful for archive retention, raw editing, and non-destructive photo finishing.
What changes when converting PAM to CR2?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to CR2 adds vector scaling. Moving to CR2 adds camera raw data.
What should I review after converting PAM to CR2?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.