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WMF at a glance
WMF
The original WMF specification was published in the Windows 3.1 SDK documentation in 1992. Aldus Corporation independently added a 'placeable' header for device independence, which Microsoft later incorporated in Windows 2000. The format specification was republished in 2006 under the Microsoft Open Specification Promise.
ARI at a glance
ARI
Digital photography fragmented into many manufacturer-specific raw formats because camera makers optimized for their own sensors, metadata, and software ecosystems rather than for one shared public raw standard.
Format comparison
| Feature | WMF | ARI |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | scalable | raw |
| File size characteristics | small | large |
| Compatibility | moderate | limited |
| Editability | high | high |
| Created year | 1990 | 2010 |
| Inventor | Microsoft Corporation | ARRI (Arnold & Richter) |
| Status | legacy | proprietary |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | good | strong |
| Metadata handling | moderate | rich |
| Delivery profile | strong | limited |
| Workflow fit | design | source |
| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Not supported |
When to use each format
When to use WMF
- illustration
- diagramming
- brand asset delivery
- Universal recognition in Windows applications.
When to use ARI
- capture ingest
- editing
- web or print delivery
- Preserve capture-stage image data for later interpretation.
FAQs
Why convert WMF to ARI?
Choose ARI as target when maintaining compatibility with ARRI-originated raw image workflows or preserving frame data for grading and finishing.
What changes when converting WMF to ARI?
Convert to ARI when maintaining compatibility with ARRI-originated raw image workflows or preserving frame data for grading and finishing. It is appropriate for professional capture archives and controlled post-production pipelines.
What should I review after converting WMF to ARI?
After conversion, review these destination checks: Open converted output in LibRaw and verify behavior on real samples; Compare output against the expected raw quality profile; Many are vendor-specific and poorly documented publicly.
How can I keep quality stable in WMF to ARI conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Compatibility often depends on decoder support in tools such as LibRaw, Adobe Camera Raw, or vendor software; Many are vendor-specific and poorly documented publicly; Validate destination compatibility before large-batch conversion.