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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.
JBIG2 at a glance
JBIG2
JBIG and JBIG2 belong to the branch of imaging standards aimed at scanned monochrome or mostly bitonal content rather than rich photographic colour imaging.
Format comparison
| Feature | PGM Raw | JBIG2 |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 2000 |
| Inventor | Jef Poskanzer | Joint Bi-level Image Experts Group |
| Status | active | active |
| 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 | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PGM Raw
- Your source file is already in PGM Raw.
- Preserve source expectations before exporting to JBIG2.
- PGM Raw is commonly used in image workflows.
When to use JBIG2
- Your target workflow expects JBIG2.
- Improve delivery compatibility with JBIG2.
- JBIG2 is commonly used in image workflows.
FAQs
Why convert PGM Raw to JBIG2?
Convert to JBIG2 when optimizing scanned monochrome documents, forms, or page archives for storage and distribution.
It is ideal for document-heavy imaging pipelines where file size matters and the source is mostly black-and-white content.
What changes when converting PGM Raw to JBIG2?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting PGM Raw to JBIG2?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.