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ARW at a glance
ARW
As Sony expanded from consumer electronics into serious camera bodies and sensors, ARW became part of the broader shift that put Sony raw support on the critical path for many photo applications.
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 | ARW | PGM Raw |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | raw | depends |
| File size characteristics | large | medium |
| Compatibility | limited | broad |
| Editability | high | moderate |
| Created year | 2006 | 1988 |
| Inventor | Sony | Jef Poskanzer |
| Status | proprietary | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | strong | moderate |
| Metadata handling | rich | moderate |
| Delivery profile | limited | strong |
| Workflow fit | source | delivery |
| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use ARW
- capture ingest
- editing
- web or print delivery
- Preserve capture-stage sensor information.
When to use PGM Raw
- capture ingest
- editing
- web or print delivery
- Minimal binary grayscale format that is easy to implement.
FAQs
Why convert ARW 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 ARW 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 ARW 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 ARW 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.