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CAP at a glance
CAP
Digital photography fragmented into many manufacturer-specific raw formats because camera makers optimized for their own sensors, metadata, and software ecosystems rather than for one shared public raw standard.
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 | CAP | PGM Raw |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2005 | 1988 |
| Inventor | Phase One | Jef Poskanzer |
| Status | proprietary | 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 | Supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use CAP
- Your source file is already in CAP.
- Preserve source expectations before exporting to PGM Raw.
- CAP is commonly used in image 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 CAP 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 CAP to PGM Raw?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PGM Raw removes camera raw data.
What should I review after converting CAP to PGM Raw?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.