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PGM at a glance
PGM
PBM, PGM, PPM, PNM, and later PAM come from the tool-centric tradition of keeping image interchange formats easy to parse, script, and transform.
IIQ at a glance
IIQ
Phase One positioned IIQ around its medium-format and digital-back workflows, which is why IIQ appears in a very different professional context from ordinary consumer camera raws.
Format comparison
| Feature | PGM | IIQ |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 2007 |
| Inventor | Jef Poskanzer / Netpbm lineage | Phase One |
| 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 | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PGM
- Your source file is already in PGM.
- Preserve source expectations before exporting to IIQ.
- PGM is commonly used in image workflows.
When to use IIQ
- Your target workflow expects IIQ.
- Improve delivery compatibility with IIQ.
- IIQ is commonly used in image workflows.
FAQs
Why convert PGM to IIQ?
Convert to IIQ when preserving Phase One originals or keeping compatibility with medium-format studio workflows built around Capture One and Phase One hardware.
It is an archival and editing format for premium photographic production.
What changes when converting PGM to IIQ?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to IIQ adds camera raw data.
What should I review after converting PGM to IIQ?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.