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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.
PGM Raw at a glance
PGM Raw
The raw PGM branch reflects the practical evolution of Netpbm-style tool formats: keep the tiny header and easy parsing, but move the pixel raster into a binary form that is much more usable for real data sizes.
Format comparison
| Feature | WMF | PGM Raw |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
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| Created year | 1990 | 1988 |
| Inventor | Microsoft Corporation | Jef Poskanzer |
| Status | legacy | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
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| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Not supported |
When to use each format
When to use WMF
- Your source file is already in WMF.
- Preserve source expectations before exporting to PGM Raw.
- WMF is commonly used in vector workflows.
When to use PGM Raw
- Your target workflow expects PGM Raw.
- Improve delivery compatibility with PGM Raw.
- PGM Raw is commonly used in image workflows.
FAQs
Why convert WMF to PGM Raw?
Convert to PGM raw when a pipeline needs direct grayscale raster data for vision research, microscopy or scientific-image preprocessing, algorithm tests, or command-line tooling where minimal format overhead matters.
It is particularly useful as an intermediate format between automated processing steps.
What changes when converting WMF to PGM Raw?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PGM Raw removes vector scaling.
What should I review after converting WMF to PGM Raw?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.