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PFM Raw at a glance
PFM Raw
Convert to PFM raw when HDR rendering, tone-mapping, or scientific-imaging workflows need floating-point pixel values to survive intact between tools.
It is especially useful as an intermediate format for graphics research, physically based rendering, and analytical image-processing pipelines that operate on scene-referred data.
EPUB at a glance
EPUB
Convert to EPUB when you need a flexible, reflowable ebook for wide distribution, library use, independent publishing, or archival storage of structured long-form text.
It is the right target for novels, manuals, educational content, and narrative works intended for multiple reading apps and devices.
Choose EPUB when portability and reader adaptability matter more than exact fixed-page layout.
Format comparison
| Feature | PFM Raw | EPUB |
|---|---|---|
| File type | Image | Ebook |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | reflowable |
| File size characteristics | medium | small |
| Compatibility | broad | moderate |
| Editability | moderate | moderate |
| Created year | 1998 | 2007 |
| Inventor | PBRT / Paul Debevec community | IDPF / W3C |
| Status | active | active |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | reading |
When to use each format
When to use PFM Raw
- capture ingest
- editing
- web or print delivery
- Stores floating-point pixel data directly.
When to use EPUB
- ebook publishing
- reader distribution
- digital libraries
- Open ecosystem support across many reading platforms.
FAQs
Why convert PFM Raw to EPUB?
Convert to EPUB when you need a flexible, reflowable ebook for wide distribution, library use, independent publishing, or archival storage of structured long-form text.
It is the right target for novels, manuals, educational content, and narrative works intended for multiple reading apps and devices.
Choose EPUB when portability and reader adaptability matter more than exact fixed-page layout.
What changes when converting PFM Raw to EPUB?
This conversion changes how the format behaves in downstream tools and delivery environments.
Size profile changes from medium in PFM Raw to small in EPUB. Quality profile changes from depends in PFM Raw to reflowable in EPUB. Compatibility profile changes from broad in PFM Raw to moderate in EPUB. Workflow profile changes from delivery in PFM Raw to reading in EPUB.
What should I review after converting PFM Raw to EPUB?
Check the exported file for Reading-system differences can still affect rendering and navigation.; Fixed-layout or retailer-specific workflows may need other formats..