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Xfig at a glance
Xfig
Xfig began in 1985 and accumulated decades of maintenance and export tooling, which made the .fig format a durable bridge between interactive diagram editing on Unix systems and downstream conversion to PostScript, PDF, and other outputs.
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 | Xfig | PGM Raw |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | scalable | depends |
| File size characteristics | small | medium |
| Compatibility | moderate | broad |
| Editability | high | moderate |
| Created year | 1985 | 1988 |
| Inventor | Supoj Sutanthavibul | Jef Poskanzer |
| Status | legacy | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | good | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | design | delivery |
| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Not supported |
When to use each format
When to use Xfig
- illustration
- diagramming
- brand asset delivery
- Preserves object-level editability for technical diagrams.
When to use PGM Raw
- capture ingest
- editing
- web or print delivery
- Minimal binary grayscale format that is easy to implement.
FAQs
Why convert Xfig to PGM Raw?
Choose PGM Raw as target 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.
What changes when converting Xfig 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 should I review after converting Xfig to PGM Raw?
After conversion, review these destination checks: Open converted output in Netpbm and verify behavior on real samples; Compare output against the expected depends quality profile; Little metadata or presentation support.
How can I keep quality stable in Xfig to PGM Raw conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Not designed for polished end-user delivery; Little metadata or presentation support; Validate destination compatibility before large-batch conversion.