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HDR at a glance
HDR
HDR raster formats became important in rendering and lighting workflows before consumer-facing HDR delivery stories matured in mainstream media formats.
PGX at a glance
PGX
These formats persist in engineering, compression research, and conversion-tool contexts where simple sample storage or adjunct technical representation is useful.
Format comparison
| Feature | HDR | PGX |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1989 | 2000 |
| Inventor | Greg Ward | ISO/IEC (JPEG 2000 committee) |
| 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 | Supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use HDR
- Your source file is already in HDR.
- Preserve source expectations before exporting to PGX.
- HDR is commonly used in image workflows.
When to use PGX
- Your target workflow expects PGX.
- Improve delivery compatibility with PGX.
- PGX is commonly used in image workflows.
FAQs
Why convert HDR to PGX?
Convert to PGX when a technical imaging or codec workflow expects grayscale component data in a simple specialist format.
It is useful for research, testing, and standards-oriented image processing.
What changes when converting HDR to PGX?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PGX removes HDR content.
What should I review after converting HDR to PGX?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.