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PEF at a glance
PEF
Pentax raw workflows never dominated the mass market, but their persistence in enthusiast and specialist photo libraries gives PEF ongoing practical relevance.
JPEG 2000 at a glance
JPEG 2000
JPX reflects the branch of JPEG 2000 that pushed beyond a simple still-image wrapper into more expressive composition and metadata scenarios for professional and institutional imaging.
Format comparison
| Feature | PEF | JPEG 2000 |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2006 | 2004 |
| Inventor | Pentax (now Ricoh) | ISO/IEC (JPEG committee) |
| Status | proprietary | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | 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 PEF
- Your source file is already in PEF.
- Preserve source expectations before exporting to JPEG 2000.
- PEF is commonly used in image workflows.
When to use JPEG 2000
- Your target workflow expects JPEG 2000.
- Improve delivery compatibility with JPEG 2000.
- JPEG 2000 is commonly used in image workflows.
FAQs
Why convert PEF to JPEG 2000?
Archival-grade image storage requiring extended JPEG 2000 capabilities, multi-component professional imaging, and complex document imaging workflows.
What changes when converting PEF to JPEG 2000?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to JPEG 2000 adds animation support. Moving to JPEG 2000 removes camera raw data.
What should I review after converting PEF to JPEG 2000?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.