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PGM in het kort
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.
WMF in het kort
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.
Formaatvergelijking
| Kenmerk | PGM | WMF |
|---|---|---|
| File type | Image | Vector |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 1990 |
| Inventor | Jef Poskanzer / Netpbm lineage | Microsoft Corporation |
| Status | active | legacy |
| Transparency | Niet ondersteund | Niet ondersteund |
| Animation | Niet ondersteund | Niet ondersteund |
| Primary use cases |
|
|
| Layer support | Niet ondersteund | Niet ondersteund |
| Vector scaling | Niet ondersteund | Ondersteund |
Wanneer je elk formaat gebruikt
When to use PGM
- Your source file is already in PGM.
- Preserve source expectations before exporting to WMF.
- PGM is commonly used in image workflows.
When to use WMF
- Your target workflow expects WMF.
- Improve delivery compatibility with WMF.
- WMF is commonly used in vector workflows.
Veelgestelde vragen
Why convert PGM to WMF?
Convert to WMF when preserving compatibility with older Windows document workflows, embedded legacy graphics, or archive recovery tasks where that classic metafile format is still expected.
It is useful as a bridge for historical Office-era vector assets.
For contemporary vector exchange, EMF, SVG, or PDF are usually more practical.
What changes when converting PGM to WMF?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to WMF adds vector scaling.
What should I review after converting PGM to WMF?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.